Why do mosses need a moist environment to reproduce sexually?

Answers

Answer 1

Answer:

So the sperm can travel to the egg

Explanation:

Their flagellated sperm must swim through water to reach the egg. So mosses and liverworts are restricted to moist habitats.


Related Questions

You are running a marathon and observe that running increases your pulse rate. Using what you know about the scientific method complete the following:

1. Hypothesis: __________________________________________________________________

_____________________________________________________________________________

2. Independent variable: _________________________________________________________

3. Dependent variable: ___________________________________________________________

4. Controlled variables (at least 3): _________________________________________________

_______________________________________________________________________________

5. Control Treatment: ___________________________________________________________

6. Experimental Treatment: _______________________________________________

Answers

Answer:

hypothesis is A hypothesis (plural hypotheses) is a precise, testable statement of what the researcher(s) predict will be the outcome of the study.

Explanation:

independent variable is what u can change

dependent variable is the one u can measure

control variable is one u keep the same

control treatment In the design of experiments, treatments are applied to experimental units in a treatment group. In comparative experiments, members of a control group receive a standard treatment, a placebo, or no treatment at all. There may be more than one treatment group, more than one control group, or both

experimental treatment in research, the conditions applied to one or more groups that are expected to cause change in some outcome or dependent variable.

A basic solution will have
O a low hydrogen ion concentration and a high pH.
O a low hydrogen ion concentration and a low pH.
O a high hydrogen ion concentration and a low pH.
O a high hydrogen ion concentration and a high pH.

Answers

Answer:

a low hydrogen ion concentration and a high pH

How is it possible that all animal life depends on the chloroplast for energy

Answers

chloroplast contains chlorphyll . Chlorophyll is used in photosynthesis to produce glucose . (photosynthesis is a process where green plants manufacture simple sugar (glucose) from carbondioxide and water by using sunlight ) 6co2+6h2o=c6h12o6+6o2

if theres no chloroplast no glucose will be produced so animals will have no energy. chloroplast must be present in order of photosynthesis to take place and produce glucose , when plants produce glucose animals get the energy needed by feeding on plants (in simple words animals eat the sugar that plants have produced )

Which clue can be used to identify a chemical reaction as a combustion reaction? Oxygen is a product. A hydrocarbon reacts with oxygen. Water and carbon dioxide react. The reaction involves ions.

Answers

Answer:

A hydrocarbon reacts with oxygen

Explanation:

The clue that can be used to identify a chemical reaction as a combustion reaction from the options would be if a hydrocarbon reacts with oxygen.

Basically, a combustion reaction is a kind of reaction involving oxygen and another reactant with energy being released in the process. The energy is usually in the form of light and heat.

Thus, following the definition:

Oxygen is rather a reactant, and may not be a product in combustion reactionsWater reacting with carbon dioxide is not a combustion reactionReaction involving ions may not be a combustion reaction

The only reaction that may identify as a combustion reaction is, therefore, the one involving hydrocarbon and oxygen.

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Choose the answer that describes biological weathering.

A: lichen growing on rocks

B: salt crystallization forming tafoni

C: stone and boulders moved by water

D: acid in water acting on limestone

Answers

Answer:

A.  lichen growing on rocks

Explanation:

Lichen growing on rocks and types of bacteria produce chemicals that weather minerals 3 to 4 times faster than normal.

Plants' roots, mosses, and lichen which grow on rocks highly responsible for biological weathering, hence option a is correct.

What is biological weathering?

Rocks are biologically weathered by living things like lichens, mosses, and plant roots, among others.

When plants break apart rocks with their roots or root exudates, this is known as biological weathering. The delayed process might have a significant impact on how a landscape is formed.

Mosses and lichens are able to break down the rock on which they grow by producing various acids.

Therefore, lichens and non-vascular plants can speed up the weathering of the rock they grow on significantly, hence option a is correct.

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Based on the information in the graph, choose the statement that best describes the reaction it depicts. A. The reaction absorbs energy. B. The reaction releases energy. C. The reaction fails to proceed because of insufficient energy. D. The reaction fails to proceed because it does not involve an energy change.

Answers

Answer:

The answer is B the reaction releases energy.

Explanation:

As per the graph, the reaction will release energy. The correct option is B.

What is exothermic reaction?

A heat-producing task is an exothermic process. This heat is conveyed to the external environment. Endothermic processes require heat to be supplied to the system from outside the system.

Exothermic reactions are heat-producing chemical reactions. When heat flows from the system to the surroundings, the heat flow q is negative. Exothermic reactions, therefore, have a negative enthalpy of reaction.

Thus, the correct option is B.

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What defines the carrying capacity of a particular species?please help

Answers

carrying capacity can be defined as a species' average population size in a particular habitat :)

Explanation:

avarage particular size in capacity

I need some help! What cell structure goes to what definition? The structures as well as the descriptions are below.

lysosome


vesicle


nucleus


Golgi apparatus


chloroplast


smooth endoplasmic reticulum


nucleolus


rough endoplasmic reticulum


ribosome


mitochondrion

1.
contains chlorophyll, site of photosynthesis

2.
contains chromosomes, directs cell’s activities

3.
contains hydrolytic enzymes

4.
membranous network that detoxifies and helps synthesize lipids

5.
membranous network that helps synthesize proteins

6.
modifies and stores the products of the ER

7.
site of cellular respiration and ATP production

8.
site of protein synthesis

9.
site of ribosomal RNA synthesis

10.
small membrane-bound sac within a cell

Answers

Answer:

1-chloroplast

2-Golgi apparatus.

Explanation:

Students in a science class were asked to investigate how missing or damaged
organelles affect cellular homeostasis for cells found in muscle tissues.
Which of the following questions should they ask to determine if these muscle cells
are functioning properly? (AKS 151)
At what rate do the chloroplasts of the cell need to capture enough sunlight to
meet the high energy needs of the cell?
At what rate do the ribosomes of the cell need to work to produce enough
glucose to meet the high energy needs of the cell?
At what rate do the mitochondria of the cell need to convert glucose to usable
energy molecules to meet the high energy needs of the cell?
At what rate does the cell wall need to break down its carbohydrate structure to
meet the high energy needs of the cell?

Answers

Answer:

At what rate do the mitochondria of the cell need to convert glucose to usable

energy molecules to meet the high energy needs of the cell?

Explanation:

Organelles are organ-like structures found in cells. The are responsible for the specific actions carried out by each cell. Each organelle has its own specific role to play. However, missing or damaged organelles can have effects on the cells.

Mitochondria are organelles found in cells of all eukaryotic living organisms e.g animal, plants as they are responsible for the synthesis of energy in form of ATP. Since the cells being investigated in this question is a MUSCLE CELL, which is only found in animals, then an appropriate organelle must be investigated.

The appropriate to be asked to know if muscles cells are functioning properly is: At what rate do the mitochondria of the cell need to convert glucose to usable energy molecules to meet the high energy needs of the cell?.

Note that, other options are incorrect because muscle cells do not have chloroplast and cell wall, while ribosomes are not site for glucose production.

In Oxygen molecule O2, stability is gained through sharing of​

Answers

Answer:

Trees and plants.

Explanation:

Trees give us oxygen and plants get rid of carbon dioxide and remake it as oxygen.

In the Oxygen molecule O2, stability is gained through sharing of​ two pairs of electrons with a single neighboring atom.

What is the sharing of electrons?

The sharing of electrons gives rise to the formation of covalent bonds between two atoms. Atoms will be covalently bonded in order to gain more stability. During the process of sharing electrons,  they are simultaneously attracted by the two atomic nuclei.

The stability of oxygen molecules is gained through the help of non-polar covalent bonds. This means that there is no difference in electronegativity of bonded atoms.

The valence shell of oxygen has six electrons, so they need two more electrons in order to fulfill its octet and maintain stability. The sharing and paring of electrons between two or more atoms construct a bond known as covalent bonds.

Therefore, in the Oxygen molecule O2, stability is gained through sharing of​ two pairs of electrons with a single neighboring atom.

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5 On his voyage on the HMS Beagle, Darwin saw fossils of giant sloths whose bones resembled bones of living sloths, but were much larger in size. Darwin hypothesized that the fossil sloths were related to sloths alive today. This hypothesis was based on (1 Point)​

Answers

Answer:

A: observation and inferences

and on this one I am 100% sure it is right

Explanation:

Enzymes are biological catalysts. Enzymes are proteins that are found inside cells to
increase the rate of chemical reactions within each cell. Enzymes are denatured
(destroyed) by various environmental conditions. Amylase is an enzyme in the digestive
system that helps to break down complex carbohydrates into simple sugars.
HYPOTHESIS: Amylase works best in an environment with a pH level of 7. what is the independent and dependent variable sum1 please help!

Answers

Answer:

Explanation:

independent= pH as you will change the pH in order to test your hypothesis and see if it's true

dependent= how amylase works-needs to be measured so you can see how easily it does it function depending on the pH (dependent on the independent variable)

The independent variable is pH, you change it to test your hypothesis; The dependent variable is the activity of amylase enzyme depend on the pH value.

What are the properties of an enzyme ?

Enzymes are protein catalysts that speed up the rate of biochemical reactions

The  enzyme activity is pH-specific, catalyze both forward and reverse reaction but do not decide the direction of the biochemical pathway.

An enzyme have active site which bind to substrate  and form desired products.

Several factors influence the enzyme activity like heat, temperature and varying pH.

Enzyme show absolute, relative, group, stereo-specificities and regulatory function.

Physical properties include enzyme act as colloid, it become inactivated below boiling point of water.

Enzymes are  thermos-labile as it can withstand temperatures of 100 degrees.

The optimum temperature needed for enzymatic activity varies from 25 degrees Celsius to 45 degrees Celsius.

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Transpiration is the loss of water from the leaves of plants. The stomata of leaves must
open to allow carbon dioxide to enter the leaf for photosynthesis, but when they are open,
water vapor escapes into the atmosphere.
HYPOTHESIS: As the intensity of light is increased, the rate of transpiration will increase,
as measured in by the loss of mass of the plant.
what is the independent and dependent variable HELP

Answers

Answer:

Explanation:

dependant= loss of mass of the plant (not sure) as you're measuring it i guess? or it may be transpiration. which one are you actually measuring

independent=light of intensity as you're changing

According to the article, what are the problems with monoculture farming? Your answer should be written in sentences and not constructed as a list.

Answers

Answer:

In addition to overproduction, industrial monoculture predisposes farms to pest problems. To keep up with intensified production, farmers increased pesticide and fertilizer usage, crop density, and the number of crop cycles per season, but decreased crop diversity

Explanation:

Monocultures lack other plant and animal species that limit the transmission of disease and manage pests through predation, which increases the danger of disease and pest outbreaks.

What is monoculture farming?

One variety of crop is grown at a time on a particular field in a practice known as monoculture farming. A poly culture system, in contrast, presupposes that two or more crops are sown in a field at once.

Because monoculture farming has the potential to disrupt the natural soil balance, it is not sustainable.

The soil moisture is unstable in a typical monoculture situation. Due to the increased need for water to irrigate crops, water sources including rivers and reservoirs are being unevenly drained.

Therefore, monoculturing is not suitable.

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What are the 5 main steps in the formation of the Solar System?

Answers

Answer:

These steps should cover it all

Can i have brainley please

Explanation:

Step 1 of the formation of the solar system

the solar nebula collapses

Step 2 of the formation of the solar system

rotating protostellar disk

Step 3 of the formation of the solar system

center of nebula fusion begins, star is born

Step 4 of the formation of the solar system

Planeteseimals eventually planets form

The formation of clumps, its collapse, heating and rapid cooling, formation of planetesimals, and Oligarchic growth  are the five main steps of solar system formation.

What is a solar system?

The Solar System is composed of the Sun and the planets gravitational bound to the Sun.

The Solar System went through five stages of creation and initial evolution:

The establishment of dense clumps within a massive molecular cloud.The clumps crumble by gravitational force to establish a protostar; angular momentum conservation outcomes in a protoplanetary disc.The sudden heating and cooling of dust results in the formation of Ca-Al-rich refractory aggregates (CAIs) and spatters of silicate melt.Planetesimals form from dust, CAIs, and chondrules.Oligarchic development into planet embryos and planets.

Thus, above mentioned are the five steps in formation of solar system.

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What two factors keep Earth in orbit around the sun and the moon in orbit around Earth? A:gravity and distance B:Mass and distance C:force and speed D:gravity and force

Answers

Mass and Distance. If the moon had a larger mass or was farther then it would fall out of Earths orbit. Same for Earth. The mass and distance affect where the planet falls into orbit

Answer:

gravity and inertia Gravity keeps Earth, along with the other planets in line, as inertia keeps them moving creating an orbit.  

its C hope it help

What relationship does Organism Y have with the other organisms in figure 1?

1. It is the herbivore that feeds on autotrophs.

2. It is the producer that provides the food base.

3. It recycles nutrients by breaking down organic matter.

Answers

I think it’s number 2. The plant can feed the other organisms

How is tonicity affected by solutes?

Answers

Unlike osmotic pressure, tonicity is influenced only by solutes that cannot cross the membrane, as only these exert an effective osmotic pressure. Solutes able to freely cross the membrane do not affect tonicity because they will always equilibrate with equal concentrations on both sides of the membrane without net solvent movement.

Where are there typically more ecological hotspots?

Answers

Answer:

There are currently 36 recognized biodiversity hotspots. These are Earth's most biologically rich—yet threatened—terrestrial regions. To qualify as a biodiversity hotspot, an area must meet two strict criteria: Contain at least 1,500 species of vascular plants found nowhere else on Earth (known as "endemic" species). The Andes Mountains Tropical Hotspot is the world's most diverse hotspot. About one-sixth of all plant species in the world live in this region. The New Zealand archipelago is another hotspot.

Explanation:

1) Which of the following types of heterotrophs eat other animals?
A. omnivores
B. herbivores
C. carnivores

Answers

Answer:

A & C (Omnivores and Carnivores) eat other animals.

Answer:

A and c

Explanation:

heterotrophs eat other animals?

. omnivores and carnivores

A 7.2 × 10–5 C charge has an electric potential energy of 1.08 × 10–2 J. The electric potential, to the nearest whole number, is V.

Answers

Answer:

150.

Explanation:

On edge

The electric potential, to the nearest whole number is 150 V.

What is the electric potential energy?

The electric potential energy denoted by U is proportional to the charge and inversely proportional to the distance between the point where its is brought from infinity to the charge.

U = kQ₁Q₂/r

For identical charge,

U =kQ²/r................(1)

and the electric potential is given by

V = kQ /r................(2)

Dividing both the equations, we get

U/V  = Q

Substitute charge Q =  7.2 × 10⁻⁵ C, Electric potential energy U = 1.08 × 10⁻² J, then the electric potential will be

V  = 1.08 × 10⁻² /   7.2 × 10⁻⁵

V = 150 Volts

Thus, the electric potential is 150 Volts.

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Shannon wants to see if the amount of time she studies will affect her grades. She normally studies for 30 minutes a night but decides to double her study time to one hour per night. Over the next three weeks, Shannon sees her science grade raise 10%
A. Independent Variable=
B. Dependent Variable=
C. Control=

Answers

Answer:

it is an independent variable as it can be changed by studying and also a dependent variable as you can measure her results and see its increase or decrease

Explanation:

hope this helps

could u pls help me with my latest questions pls pls pls pls pls

The variables in the given situation would be as follows:

A). Independent Variable: Amount of time given on study

B). Dependent Variable: Grade in Science

C). Control: Additional Study of 30 minutes

In an experiment or research, an independent variable is described as a variable that remains unaffected by the change in other but rather a manipulation or change in it can affect the other variables. Dependent variables are the variables that receive a direct effect of change in the other variable and therefore, it is the variable that the researcher aims to measure or study.While control helps in making the comparison of the results with or without it. Thus, the given variables are classified in this situation as mentioned above.

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Select all answers that reflect contributions molecular approaches have made to modern taxonomy. Check All That Apply revealed that ssu rRNA is highly conserved so can be used for classificationrevealed that ssu rRNA is highly conserved so can be used for classification have led to the development of a new taxonomic system divided into domainshave led to the development of a new taxonomic system divided into domains have not changed the overall tree of lifehave not changed the overall tree of life revealed that archaea are more closely related to prokaryotic than eukaryotic cells

Answers

Answer:

- revealed that rRNA is highly conserved so can be used for classification

- have led to the development of a new taxonomic system divided into domains

Explanation:

The ribosomal RNA (rRNA) genes are widely used in evolutionary, phylogenetic, and phylogeographic studies as molecular markers because they represent nuclear genes that are highly conserved between species. However, it is important to highlight that rRNA genes form arrays at specific chromosomal sites, thereby they often exhibit pseudogenes that may interfere with their use as molecular markers (i.e., they produce multiple bands in the electrophoresis gel). In 1977, Carl Woese showed that Archaea is an evolutionary lineage separated from Bacteria by using molecular evidence based on an rRNA molecular marker (16S rRNA). Thus, Woese indicated that Eukarya, Bacteria and Archaea represent three different domains that arose separately from an evolutionary ancestor named 'progenote'.

All of the following movements can occur across the intervertebral joints of the vertebral column except:______
a) extension.
b) lateral flexion.
c) flexion.
d) dorsiflexion.

Answers

Answer:

D) dorsiflexion

Explanation:

extension, lateral flexion, flexion can occur across intervertebral joints of the vertebral column. Dorsiflexion is the odd one out.

Dorsiflexion is the act of bringing the toes closer to the shin, it is also referred to as the backward bending of an individual's foot or hand. when someone is walking on the heels of their ankle, their ankle can be described to be in dorsiflexion. therefore option d answers the question.

PLEASE HELP MEH!!!!

A patient’s blood is tested for growth hormone which has a molecular mass of 848.952 g/mol. The test results show a normal concentration of 4 . 0 × 10 − 6 g/L. How many moles of growth hormone are in 1 L of blood?

Answers

30 g molecular concrete

Explain how the bacteria and animals around the hydrothermal vents showed scientists that life was much more adaptable than they had believed.

Answers

Explanation:  

Well, its extremely hot in the hydrothermal vents. Scientists simply believed it would be impossible for anything to survive due to the heat. Bacteria and micro-organisms were able to adapt to growing there, though. So in short words, they survived extreme conditions teaching scientists that life was quite adaptable.

Weird fun fact: In Switzerland it is illegal to own just one guinea pig. Felt the need to mention that ^ Sorry, I know it has nothing to do with the question but i felt it was worth speaking of.

Which eukaryotic kingdoms could be made up of multicellular organisms

Answers

Answer:

the inside

Explanation:

Researchers propose a model to explain variation in phytoplankton cell sizes in a marine environment. They base their model on the idea that smaller cells absorb nutrients more efficiently. The researchers predict that the mean diameter of phytoplankton cells will change by 50 micrometers for every 5-kilometer increase in distance from the shore because of a gradual decrease in nutrient availability. To test their model, the researchers determine that the phytoplankton cells found closest to shore have a mean diameter of 900 micrometers. Based on the model, what will be the mean diameter of the phytoplankton cells that are found 25 kilometers from shore?

Answers

The mean diameter of  phytoplankton cell is 650 micrometers at a distance of 25 kilometers from the sea shore.

The mean diameter of  phytoplankton cell is 650 micrometers because at every 5 kilometers, decrease occur in the diameter of phytoplankton cell about 50 micrometers and we know that the the diameter of phytoplankton cell is 900 micrometers so for 25 kilometers there is 250 micrometers decrease occur in the diameter of phytoplankton cell.

So this 250 micrometers are substracted from 900 micrometers we get 650 micrometers. So we can say that the mean diameter of  phytoplankton cell is 650 micrometers at 25 kilometers distance from the sea shore.

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In red shift the wavelengths of light become ?

Answers

What subject is hypos? *this

4. If a galaxy is moving towards us, what would happen to the wavelengths of light that we see? How
would that change what we see?

Answers

Answer:

Redshift and blueshift describe how light shifts toward shorter or longer wavelengths as objects in space (such as stars or galaxies) move closer or farther away from us. ... When an object moves away from us, the light is shifted to the red end of the spectrum, as its wavelengths get longer.

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Levin Furniture buys a living room set with a $4,000 list price and a 55% trade discount. Freight (FOB shipping point) of $50 is not part of the list price. What is the delivered price (including freight) of the living room set, assuming a cash discount of 2/10, n/30, ROG? The invoice had an April 8 date. Levin received the goods on April 19 and paid the invoice on April 25. the l.c.m of 5ab and 3ab The Kingdoms James Baldwin There was once a king of Prussia whose name was Frederick William. On a fine morning in June he went out alone to walk in the green woods. He was tired of the noise of the city, and he was glad to get away from it. So, as he walked among the trees, he often stopped to listen to the singing birds, or to look at the wild flowers that grew on every side. Now and then he stooped to pluck a violet, or a primrose, or a yellow buttercup. Soon his hands were full of pretty blossoms. After a while he came to a little meadow in the midst of the wood. Some children were playing there. They were running here and there, and gathering the cowslips that were blooming among the grass. It made the king glad to see the happy children, and hear their merry voices. He stood still for some time, and watched them as they played. Then he called them around him, and all sat down together in the pleasant shade. The children did not know who the strange gentleman was; but they liked his kind face and gentle manners. "Now, my little folks," said the king, "I want to ask you some questions, and the child who gives the best answer shall have a prize." Then he held up an orange so that all the children could see. "You know that we all live in the kingdom of Prussia," he said; "but tell me, to what kingdom does this orange belong?" The children were puzzled. They looked at one another, and sat very still for a little while. Then a brave, bright boy spoke up and said,-- "It belongs to the vegetable kingdom, sir." "Why so, my lad?" asked the king. "It is the fruit of a plant, and all plants belong to that kingdom," said the boy. The king was pleased. "You are quite right," he said; "and you shall have the orange for your prize." He tossed it gayly to the boy. "Catch it if you can!" he said. Then he took a yellow gold piece from his pocket, and held it up so that it glittered in the sunlight. "Now to what kingdom does this belong?" he asked. Another bright boy answered quickly, "To the mineral kingdom, sir! All metals belong to that kingdom." "That is a good answer," said the king. "The gold piece is your prize." The children were delighted. With eager faces they waited to hear what the stranger would say next. "I will ask you only one more question," said the king, "and it is an easy one." Then he stood up, and said, "Tell me, my little folks, to what kingdom do I belong?" The bright boys were puzzled now. Some thought of saying, "To the kingdom of Prussia." Some wanted to say, "To the animal kingdom." But they were a little afraid, and all kept still. At last a tiny blue-eyed child looked up into the king's smiling face, and said in her simple way,-- "I think to the kingdom of heaven." King Frederick William stooped down and lifted the little maiden in his arms. Tears were in his eyes as he kissed her, and said, "So be it, my child! So be it." The little girl who gives the final answer causes the king to feel A) struck by her charm. B) moved by her innocence. C) alarmed by her insight. D) mystified by her identity. 100000000000 to the 10th power what is 660 increased by 1 followed by a further one How fast must the space shuttle go to cover 20,000 meters in 4.0 seconds? ___ use a period within parentheses that is inside a sentence. often sometimesneveralwaysrarely -16 = -5x + x please help Solve 3(x - 1) + 2 = 5x + 6, Answer is a decimal round to the hundredth (2 digits) or use / for fraction bar. Someone help FAST ! Its talking about integers. 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