Sexual reproduction occurs in the flower of flowering plants. Male gametes are produced in anthers of the flower and are found in pollen. Female gametes are produced in the flower’s ovary and are found in ovules.
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Answer:
4. Flowers
Explanation:
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Evaluate the model.select that do NOT accurately identify the structures labeled in the picture. Choose all that apply.
Answer:
C.)Genes,E are pairs of chromosomes that code for traits.
D.)Genes,G, are segments of chromosomes that carry traits
Explanation:
A student wanted to see if covering a leaf in foil would stop it from producing starch. Why should the student put the plant in a dark cupboard for 48 hours before returning it to the light and starting the experiment?
1. To make the results reliable
2. So that the plant would photosynthesise faster when returned to the light
3. So that any starch already in the leaf was used up by the plant
4. He did that simply
Answer:
4.) He did that simply
Explanation:
I'm just guessing it's 1 because the other answers don't seem reasonable
Answer:
Putting the plant in dark for 48 hours would stop the process of photosynthesis as light is required for it. Photosynthesis produces organic sugars which are stored in form of starch in plants. The absence of photosynthesis would lead to the consumption of all stored starch making the leaf starchless. The correct answer is option D.
Explanation:
How does an amoeba breathe
Answer:
Amoebas have a semirigid layer of ectoplasm which absorbs oxygen from the surrounding water and eliminates carbon dioxide in a form of respiration.
Explanation:
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Terrence likes to eat morel mushrooms, which are native to Georgia. How do the kingdoms to which humans and morels belong DIFFER? How are they SIMILAR?
Answer:
Mushrooms are in kingdom Fungi and humans are in kingdom Animalia
Explanation:
These two kingdoms are similar in that they are both in Domain Eukarya, meaning they have eukaryotic cells (have a nucleus, membrane bound organelles, are relatively large and organized). Both are also heterotrophic, meaning they eat other organisms to get energy. They are different in that fungi cells have cell walls made of chitin while animals do not have cell walls. Fungi tend to live pretty sedentary lives, and while that is true for some animals, that is not true of most. Fungi are also decomposers while animals are consumers.
What is the definition of the word Transformation
Answer:
significa el resultado de un proceso de cambio de forma. Sucede cuando una cosa, hecho o idea es convertida en otra.
Explanation:
1pt Place the following steps in the correct order:
1. Sperm nuclear envelope breaks down
2. Genomes blend to form a diploid cell
3. Decondensation occurs
4. Sperm head penetrates egg cytoplasm.
Answer:
The delivery of the paternal genome to the egg is a primary goal of fertilization. In preparation for this step, the nucleus of the developing spermatozoon undergoes extensive morphological and biochemical transformations during spermatogenesis to yield a tightly compacted sperm nucleus. These modifications are essentially reversed during fertilization. As a result, the incorporated sperm nucleus undergoes many steps in the egg cytoplasm as it develops into a male pronucleus. The sperm nucleus (1) loses its nuclear envelope, (2) undergoes nucleoprotein remodeling, (3) decondenses and increases in size, (4) becomes more spherical, (5) acquires a new nuclear envelope, and (6) becomes functionally competent to synthesize DNA and RNA. These changes are coordinate with meiotic processing of the maternal chromatin, and often result in behaviors asynchronous with the maternal chromatin. For example, in eggs fertilized during meiosis, the sperm nucleus decondenses while the maternal chromatin remains condensed. A model is presented that suggests some reasons why this puzzling behavior exists. Defects in any of the processes attending male pronuclear development often result in infertility. New assisted reproductive technologies have been developed that ensure delivery of the sperm nucleus to the egg cytoplasm so that a healthy embryo is produced. An emerging challenge is to further characterize the molecular mechanisms that control sperm nuclear transformations and link these to causes of human infertility. Further understanding of this basic process promises to revolutionize our understanding of the mystery of the beginning of new life.
Explanation:
The delivery of the paternal genome to the egg is a primary goal of fertilization. In preparation for this step, the nucleus of the developing spermatozoon undergoes extensive morphological and biochemical transformations during spermatogenesis to yield a tightly compacted sperm nucleus. These modifications are essentially reversed during fertilization. As a result, the incorporated sperm nucleus undergoes many steps in the egg cytoplasm as it develops into a male pronucleus.
why do you think there is so much life on our planet ?
Answer:
Earth's atmosphere and surrounding supports life.
Explanation:
The oxygen, nitrogen and carbon that's abundant on Earth promotes life.
Conduction can only occur between two objects when –
Answer:
Conduction can only occur between two objects when -
one object is less dense than the other. both objects are in physical contact with each other.
If a mutation helps an offspring survive and reproduce, the mutation can become an____ in future generations.
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Answer:
An adaptation
Explanation:
If the mutation has a positive effect on the fitness of the offspring, it is called an adaptation.
Plants take in carbon dioxide from the atmosphere.
Figure 2 shows part of the carbon cycle.
Describe how carbon from the atmosphere is cycled through living organisms.
Answer:
Carbon enters the atmosphere as carbon dioxide from respiration and combustion. Carbon dioxide is absorbed by producers to make glucose in photosynthesis. ... Decomposers break down the dead organisms and return the carbon in their bodies to the atmosphere as carbon dioxide by respiration.
Explanation:
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Which of the following will result from the bottleneck effect?
A. Increase genetic diversity
B. Decrease genetic diversity
C. Adaptation of species
D. Reproductive Isolation
Answer:
B. Decrease genetic diversity
Explanation:
Answer:
Explanation:
decrease in genetic diversity because only some species will reproduce adequately due to the bottleneck effect
The change in leaf color on these trees is one way the trees maintain what
If a device is removed from one loop in a parallel circuit, the other devices are not affected and can still flow through them.
Answer:
yes it still can flow through i hope that helped you
Explanation:
Answer:
Yes
Explanation:
1. Name the protists fitting each of the following descriptions.
Write down only the correct name next to the relevant question number.
1.1 A protozoan which moves using its pseudopodia.
1.2 A protozoan which moves using its flagellum.
1.3 A filamentous green alga.
1.4 A unicellular green alga.
1.5 Microscopic protists which appear as symmetrical, human-made, and
glass-like ornaments.
1.6 Protists that look like fungi.
(6)
Answer:
1.1 Amoeba
1.2 Paramecium
1.3 Citations
1.4 Single algae cells
A protozoa that moves using its pseudopodia is an amoeba, one using its flagellum is Euglena and a filamentous green alga is Spirogyra. Chlamydomonas is a unicellular green alga. Microscopic protists that are symmetrical, man-made and appear as glass-like ornaments are diatoms while a protist that looks like a fungus is a mold.
What are Protists?A protist is a type of eukaryotic organism which is not an animal, plant, or fungus sharing a common ancestor. These are to the exclusion of other eukaryotes which means protists do not form a natural group or clade.
Protists are a group of diverse eukaryotic mainly unicellular microscopic organisms which share certain morphological and physiological characteristics with animals or plants or both.
Several protists showing different functions like an amoeba pushes out its cell membranes to form pseudopods. Euglena belongs to the class of protozoans known as flagellates. Spirogyra has a slender bright green color with a spiral shaped pigment that holds chlorophyll. Chlamydomonas is found in ponds, ditches and moist soil. Diatoms have a silky jewel-like covering. A mold is a protist which is a fungus.
Thus, a protozoa that moves using its pseudopodia is an amoeba, one using its flagellum is Euglena and a filamentous green alga is Spirogyra. Chlamydomonas is a unicellular green alga. Microscopic protists that are symmetrical, man-made and appear as glass-like ornaments are diatoms while a protist that looks like a fungus is a mold.
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Which of the following terms would Bb
represent in an organism?
A. phenotype
B. genotype
C. genetics
Seafloor spreading happens mostly under the sea except in
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Answer:
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Part C-Answer true or false:
a. If a plant cell is placed in a salt solution, the central vacuole will shrink
b. If a red blood cell is placed in distilled water, it will shrink
c. If a plant cell is placed in distilled water, the cell membrane will move away from the cell wall
d. If a red blood cell is placed in a salt solution, the salt will enter the cells, giving them a strange appearance
which is not characteristic of mammals
(A) hair covering
(B) 3 chambered heart
(C) produce milk
(D) produce sweat
Answer:(C) produce milk
Explanation:
Answer:
I guess it is (B) 3 chambered heart
What characteristics do mutations have? select all that apply.
omission of information
always harmful
addition of information
mistakes in copying
occasionally beneficial
Answer:
all of above
Explanation:
The Punnett square predicts the ratio of genotypes in the offspring, based on the genotypes of the parents. The Punnett square below examines the chance of offspring having freckles, which is a dominant trait.
A Punnett square is shown. The columns are labeled Upper F and f. The rows are labeled Upper F and f. Clockwise from upper left the boxes contain: Upper F Upper F, Upper F f, Upper F f, f f.
Based on the Punnett square, what is the probability that the offspring will have freckles?
25 percent
50 percent
75 percent
100 percent
Answer:
75%
Explanation:
Three of the boxes contain an Upper case F, therefore 75% of the boxes have an Upper case F. It's like quarters, if you have 4 quarters you have 100 cents, if you have 3 you have 75 cents, if you have 2 you have 50 cents, and if you have 1 you have 25 cents.
Answer:
C.) 75 percent
Explanation:
Why is it so important for us to decrease our use of fossil fuels?
A. The combustion of fossil fuels are causing a hole in the Ozone layer
B. The combustion of fossil fuels leads to an increase in atmospheric CO2 which leads to global climate change
C. The combustion of fossil fuels help us meet our energy demands, so it is not that important that we switch to alternatives.
D. Fossil Fuels do not harm the environment, but we are running out of them so we need alternatives.
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Answer: it
Explanation: I know
Answer:
B.
Explanation:
Fossil fuels definitely harm the environment, and their supply is depleting. So that takes out answers C and D, leaving A and B. The main cause of ozone depletion and the ozone hole is manufactured chemicals being released into the air. While CO2 from fossil fuels does have an effect on worsening the hole, it has a much higher effect on global climate change.
a negative ion made of oxygen and hydrogen
Primary source of energy
Used for movement cell defense, cell structure, communication, and cell regulation
Composes the outside of the cell membrane
Carries hereditary information
Pair each structure with its function:
*Nucleic acid
*Protein
*Lipid
*Carbohydrate
*Water
Answer:
Despite differences in structure and function, all living cells in multicellular organisms have a surrounding cell membrane. Just as the outer layer of your skin separates your body from its environment, the cell membrane (also known as the plasma membrane) separates the inner contents of a cell from its exterior environment. This cell membrane provides a protective barrier around the cell and regulates which materials can pass in or out.
Structure and Composition of the Cell Membrane
The cell membrane is an extremely pliable structure composed primarily of two layers of phospholipids (a “bilayer”). Cholesterol and various proteins are also embedded within the membrane giving the membrane a variety of functions described below.
A single phospholipid molecule has a phosphate group on one end, called the “head,” and two side-by-side chains of fatty acids that make up the lipid “tails” (Figure 3.1.1). The lipid tails of one layer face the lipid tails of the other layer, meeting at the interface of the two layers. The phospholipid heads face outward, one layer exposed to the interior of the cell and one layer exposed to the exterior (Figure 3.1.1).
This diagram shows the structure of a phospholipid. The hydrophilic head group is shown as a pink sphere and the two tails are shown as yellow rectangles. This diagram shows a phospholipid bilayer. Two sets of phospholipids are arranged such that the hydrophobic tails are facing each other and the hydrophilic heads are facing the extracellular environment.
Figure 3.1.1 – Phospholipid Structure and Bilayer: A phospholipid molecule consists of a polar phosphate “head,” which is hydrophilic and a non-polar lipid “tail,” which is hydrophobic. Unsaturated fatty acids result in kinks in the hydrophobic tails. The phospholipid bilayer consists of two adjacent sheets of phospholipids, arranged tail to tail. The hydrophobic tails associate with one another, forming the interior of the membrane. The polar heads contact the fluid inside and outside of the cell.
The phosphate group is negatively charged, making the head polar and hydrophilic—or “water loving.” A hydrophilic molecule (or region of a molecule) is one that is attracted to water. The phosphate heads are thus attracted to the water molecules of both the extracellular and intracellular environments. The lipid tails, on the other hand, are uncharged, or nonpolar, and are hydrophobic—or “water fearing.” A hydrophobic molecule (or region of a molecule) repels and is repelled by water. Phospholipids are thus amphipathic molecules. An amphipathic molecule is one that contains both a hydrophilic and a hydrophobic region. In fact, soap works to remove oil and grease stains because it has amphipathic properties. The hydrophilic portion can dissolve in the wash water while the hydrophobic portion can trap grease in stains that then can be washed away. A similar process occurs in your digestive system when bile salts (made from cholesterol, phospholipids and salt) help to break up ingested lipids.
What is artificial selection? How is the development of different dog breeds an illustration of artificial selection?
Answer:
Artificial selection is process in which humans select the traits in animals and plants and use animal breeding or plant breeding to produce the animal or plants with desired traits.
Different dog breeds is very good example of artificial selection because with the help of artificial selection humans can drastically alter the appearance of dogs. With artificial selection human can develop Great Dane from the tiny Chihuahua.
Answer:
When humans breed animals for a specific trait.
Explanation:
Ap Ex
At what age is a child likely to learn to sit up without support? (2 points)
One day
Ob
One month
ос
Five months
Od
Nine months
Answer:
I think the answer is Five months
Explanation:
Answer:c
Explanation:
five months
cells are classified as either prokaryotic or eukaryotic according to differences in their structure. However these cells also share several traits.
Answer:
ya coz there are some difference between them , they aren't completely different .
Explanation:
White tailed deer begin their reproductive cycle in the fall. Rising testosterone levels in
male white tailed deer cause them to start their breeding season around the same
time. Offspring are born the following spring and summer.
What is the most likely explanation for the white-tailed deer having a seasonal
breeding cycle instead of a monthly breeding cycle?
The explanation for the white-tailed deer having a seasonal breeding cycle should be that deer provide birth in the spring and summer.
What is seasonal breeding?It is considered to be animal species so it should be successfully mated at the time of specific times of the year. It permits the optimization of survival of young because of factors like food, water availability, etc
So, here deer provide birth in the spring and summer for avoiding the pregnancy at the time of hot summer months.
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Which of the following are products of cellular respiration?
Question 8 options:
sugar and carbon dioxide
sugar and oxygen
adenosine diphosphate and oxygen
adenosine triphosphate and carbon dioxide
Answer: adenosine triphosphate and carbon dioxide
Explanation:
Changes in weather are caused by the movement and interaction of _______ ______________. What should I fill the blanks in with?
Answer:
Air masses
Explanation:
An air mass is a volume of air defined by its temperature and water vapor content. Air masses adapt to the characteristics of the surface below them.