Answer:
The seed plants are often divided arbitrarily into two groups: the gymnosperms and the angiosperms. The basis for this distinction is that angiosperms produce flowers, while the gymnosperms do not.
Explanation:
The seed plants are often divided arbitrarily into two groups: the gymnosperms and the angiosperms. The basis for this distinction is that angiosperms produce flowers, while the gymnosperms do not. This is poor form, since it defines the gymnosperms by the absence of a character, and not by any features that the organisms actually share. The gymnosperms do share a number of features, but, as should be obvious from the above cladogram, they are not more closely related to each other than to the angiosperms (Anthophyta). The features shared by gymnosperms were likely present in the early ancestors of the flowering plants as well. It should also be noted that the "progymnosperms" are represented by a box of a different color, in order to make it clear that they are not actually seed plants, but rather are included here because they are believed to be the closest relatives of the seed plants.
Systematics within the seed plants is poorly understood. Part of the problem is that most of the major groups have gone extinct, and several of the groups alive today consist primarily of plants with highly derived morphologies. The above cladogram is based largely on the work of Jim Doyle, a professor at UC Davis, and Michael Donoghue, currently at Harvard, and is therefore somewhat preliminary. It includes some questionable groupings not explicitly supported in their papers.
how many chromosomes do whales have
Answer:
i have been researching and i found they have 42 chromosomes. Blue whales have 44 and sperm whales have 46 i was getting different numbers for different whales
Explanation:
Hope i helped!
Plants have an added layer that animal cells do not. What is that added layer called?
Answer:
a cell wall
Explanation:
Pleas give me an answer if you actually really know the answer because everybody is giving different answers, pls
Answer:
plants
Explanation:
plants are green
Answer:
Some kind of organisms that chloroplasts are found in are green plants and algae, also photosynthetic tissues that are not green, such as red leaves, etc.
Explanation:
Hope it helps!
Two students are given cubic boxes, measuring 10 cm on a side. Robert puts a single glass marble with a
diameter of 10 cm in the box. Susan puts 1,000 1-cm glass marbles in her box.
1. Whose box has more empty space? Explain.
Answer:
Both boxes have the same amount of empty space
Explanation:
Given
Cube Box
[tex]Length = 10cm[/tex]
Robert:
1 glass marble
[tex]Diameter = 10cm[/tex]
Susan:
1000 glass marble
[tex]Diameter = 1cm[/tex]
Required
Whose box has more empty space?
First, we need to calculate the volume of the cubic box.
[tex]Volume = Length^3[/tex]
Substitute 10cm for Length
[tex]Volume = 10^3[/tex]
[tex]Volume = 1000cm^3[/tex]
Next, calculate the volume of Robert's glass
Volume is calculated as:
[tex]Volume = \frac{4}{3}\pi r^3[/tex] ---- Volume of a sphere
Where
r = radius
[tex]r = \frac{1}{2} * Diameter[/tex]
[tex]Diameter = 10cm[/tex] --- Given
Substitute 10 for diameter
[tex]r = \frac{1}{2} * 10cm[/tex]
[tex]r = 5cm[/tex]
So:
[tex]Volume = \frac{4}{3}\pi r^3[/tex]
[tex]Volume = \frac{4}{3} * \frac{22}{7} * 5^3[/tex]
[tex]Volume = \frac{4}{3} * \frac{22}{7} * 125[/tex]
[tex]Volume = 523.8cm^3[/tex]
Next, we determine the volume of Susan's 1000 glasses
Volume is calculated as:
[tex]Volume = \frac{4}{3}\pi r^3[/tex] ---- Volume of a sphere
Where
r = radius
[tex]r = \frac{1}{2} * Diameter[/tex]
[tex]Diameter = 1cm[/tex] --- Given
Substitute 1cm for diameter
[tex]r = \frac{1}{2} * 1cm[/tex]
[tex]r = 0.5cm[/tex]
Substitute 0.5cm for radius in [tex]Volume = \frac{4}{3}\pi r^3[/tex]
[tex]Volume = \frac{4}{3} * \frac{22}{7} * 0.5^3[/tex]
[tex]Volume = \frac{4}{3} * \frac{22}{7} * 0.125[/tex]
[tex]Volume = 0.5238[/tex]
But there are 1000 glasses.
So, the volume of 1000 glasses is:
[tex]Volume = 0.5238 * 1000[/tex]
[tex]Volume = 523.8cm^3[/tex]
--------------------------------------------------------------------------------------------------------------
For Robert:
[tex]Volume = 523.8cm^3[/tex]
For Susan:
[tex]Volume = 523.8cm^3[/tex]
Since, they have the same volume.
Both boxes have the same amount of empty space
From the dimensions of glass marble for robert and susan, we can say that; none of the given boxes have more empty space.
We are told that the cubic boxes have a measure of 10 cm for its' sides.
Formula for volume of a cube is;
V = lwh
where;
l is length
w is width
h is height
Thus; V = 10 × 10 × 10
V = 1000 cm³
For Robert;
We are told that he puts a glass marble with a diameter of 10 cm in the box. The glass is usually spherical in shape and the volume of a sphere is;
V = ⁴/₃πr³
Thus;
V_rob = ⁴/₃π × (10/2)³
V_rob = 523.6 cm³
Volume left for rob = 1000 - 523.6
Volume of empty space left for rob = 476.4 cm³
For Susan;
V = ⁴/₃πr³
Thus;
V_sus = ⁴/₃π × (1/2)³ × 1000
V_sus = 523.6 cm³
Volume left for susan = 1000 - 523.6
Volume of empty space left for susan = 476.4 cm³
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what is glandular system
Answer:
the endocrine system is the collection of glands that produce hormones that regulates metabolism, growth and development, tissue function, sexual function, reproduction,sleep and mood,then other things.
Answer:
The endocrine system is the collection of glands that produce hormones that regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep, and mood, among other things.
Which type of cancer is the fastest growing? Explain your answer, using your relevant data.
What changes happen in cancerous cells?
Answer:
more pain
Explanation:
some cells will die and this disease cannot be
treated and you would feel more pain
and so dangrous
Considering the connections between Yellowstone’s wolves, aspen and willow trees, and elk; which one is the keystone species.
Answer:
The keystone species is the wolf.
Explanation:
Every species of organism is important to the ecosystem, so if just one species gets extinct for whatever reason there will be consequences for the other species. How big the consequences will be, depends on the species and on how big of an effect it has on the ecosystem. Some species have relatively small importance, while some have huge importance, and the ones that have huge importance are called keystone species.
The keystone species have such big importance to an ecosystem that with their presence everything is under control, but if they go extinct then the ecosystem suffers badly and changes dramatically. In this case, a keystone species is the wolf. The wolves control the elk population, which in turn means that there is no shortage of food for the elk and they don't damage the young trees. By not damaging the young trees, they grow, so there is a much larger area covered by forest. More forest means less erosion, the water of the streams is better controlled, and there is less meandering. If the wolves are out of the picture, as they were for some time, the picture is totally opposite.
What happens over time to rock that is stressed?
A The rock becomes gravel
D. The color of the rock changes.
C. The rock melta to liquid
D. The shape of the rock deforms
SUMMIT
Answer:
The rock becomes gravel
Explanation:
Answer:
The shape of the rock deforms
Explanation: i took a quiz on a.pex and it was right
Cell division is completed when which step is finished? (SE 5A) Select one: a. interphase b. telophase c. mitosis d. cytokinesis
Answer: Cytokinesis
Explanation: I am taking this same test right now and got it correct.
Cell division is completed when cytokinesis, which is the final step of mitosis, referring to cytoplasmic division, is completed. So the correct option is D.
What is mitosis?A kind of cell division known as mitosis occurs when a single cell (the mother) splits into two genetically identical daughter cells. Mitosis, when referring to the cell cycle, is the stage of cell division during which the DNA in the cell's nucleus is divided into two identical sets of chromosomes.
Mitosis is used in the vast majority of cell divisions that take place in your body. Mitosis fills an organism's body with cells during development and growth, and it substitutes old, tattered new cells over the course of an organism's existence. Mitotic divisions are a kind of reproduction for single-celled eukaryotes like yeast, resulting in the generation of new members of the population.
In each of these scenarios, ensuring that each daughter cell receives a flawless, complete set of chromosomes is the "objective" of mitosis. In general, cells with too few or too many chromosomes don't function effectively; they may die off or potentially spread cancer. Thus, during mitosis, cells don't just randomly split their DNA into two heaps for the two daughter cells. Instead, they divided up their duplicate chromosomes in a methodical order.
Therefore the correct option is D.
Read more about mitosis, here
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what causes a seismic waves
Answer:
Seismic waves are the waves of energy caused by the sudden breaking of rock within the earth or an explosion. They are the energy that travels through the earth and is recorded on seismographs. Earthquakes radiate seismic energy as both body and surface waves.
Explanation:
Answer:
caused by the sudden breaking of rock within the earth of an explosion.
Explanation:
dont judge me if im wrong
What is the definition of erosion in rock biology?
Answer:
Erosion is the process where rocks are broken down by natural forces such as wind or water. There are two main types of erosion: chemical and physical.What significance does the temperate zone have on commercial fishing?
a. the zone's clear water makes it easier to catch fish
b. mostly consists of large fish that are more commercially viable
c. greater abundance of commercial species
d. very few mammalian species that compete for the fish
Answer:
I believe C. greater abundance of commercial species is your answer. hope this helps and have a nice day!
Answer:
It is C!
Explanation:
PLATO
Reasoning: Write a three sentence statement that connects your evidence to your claim
about living organisms.
Answer:
Living organisms such as birds, animals, plants and microorganisms form the biotic component while land, air and water form the abiotic components. Biotic and abiotic components interact with each other resulting in transfer and replenishment of energy and nutrients.
Explanation:
Pls help me with this question
B. Explain the steps used to separate chalk powder, rice grains and stones
Answer:
chalk powder can be seaprated by dissolving with water
rice grains remain
stones by hand
Answer:
chalk with the machine and rest all with hands
Explanation:
How is the process of photosynthesis essential to sustaining life on Earth?
Answer:
Photosynthesis is important to living organisms because it is the number one source of oxygen in the atmosphere. Without photosynthesis, the carbon cycle could not occur, oxygen-requiring life would not survive and plants would die.
... The importance of photosynthesis in our life is the oxygen it produces.
Answer:
without the process of photosynthesis, plant would not be able to provide glucose (the food they consume) and in turn, they would die. Plants also produce )2 as a byproduct of photosynthesis which humans depend on so they we breathe.
Explanation:
Why are water striders able to "walk on water"?
Answer:
Water striders can walk on top of water due to a combination of several factors. Water striders use the high surface tension of water and large hydrophobic legs to help them stay above water. Water striders use this surface tension to their advantage through their highly adapted legs and distributed weight.
Hope this helps :)
A researcher is studying a cornfield that has been recently abandoned by a farmer. By the end of one
year, wild grasses begin to grow in the field.
Identify whether this is an example of primary succession or secondary succession.
Answer:
ummm
Explanation:
HELP PLEASE!! NEED ANSWER REALLY QUICK!
Answer:
b
Explanation:
Effects of hurricanes
Answer:
Storm surge, tornadoes, heavy rainfall, high winds, riptide, and death are the most major effects of hurricanes. While a hurricane is approaching the coast, the sea level increases swiftly. Since the sea level rises, the amount of water can cause many deaths from drowning.
Explanation:
mark BRAINLIST
thx
Answer: They Produce strong winds and storm surge flooding,heavy rain fall that can result house and buildings flooding,and rip currents and it can also cause Tornadoes.
Which one of the following organisms IS EATEN BY AN OMNIVORE in this food web?
If you don’t know the answer please don’t guess bc this is ixl and it’ll start me over.
Answer:
the cytoplankton
Explanation:
Compare the nervous system of the shrimp to that of a vertebrate.
Answer: The majority of animals on our planet, about 95 percent, do not possess a true backbone and are called invertebrates. It's common knowledge that vertebrates like humans have a complex nervous system that reacts to stimuli, but much less is known about invertebrates like shrimp and insects. While it's somewhat different from that of vertebrates, shrimp do have a central nervous system comprised of four main parts.
Explanation:
The nervous system is a highly specialized organ found in vertebrates.
The nervous system
The nervous system is a complicated system in the body of a vertebrate that is made up of the peripheral nervous system, which includes cranial nerves, spinal nerves, involuntary nerves, etc., and the central nervous system, which includes the brain and spinal cord.Neurons in the nervous system primarily relay signals to the various bodily parts.Somatic and visceral components are part of the peripheral nervous system.The two halves of the vertebrate nervous system are the grey matter and the white matter.The central nervous system and the peripheral nervous system make up the nervous system.The spinal cord and the brain, which regulate all bodily functions, make up the central nervous system.The cranial and spinal nerves, on the other hand, are part of the peripheral nervous system, which links the central nervous system to the rest of the body.Nerves carry electrical impulses from the skin and other sensory organs to the brain, which interprets the stimuli and delivers a reaction to the muscles and glands of the body.learn more about it
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What are weather balloons?
Locations with instruments that measure weather conditions in specific land areas
Numerical equations based on weather-related factors that forecast weather
Objects that carry instruments into the stratosphere to measure atmospheric conditions
Structures that orbit Earth in the exosphere to capture images and collect data
Answer:
What are weather balloons?
Objects that carry instruments into the stratosphere to measure atmospheric condition.
Answer:
c i think i hope u get a good test score
Explanation:
What is DNA replication? Highlight your answer.
A. Conservative
B. Non-conservative
C. Semi-conservative
D. None of the above
Answer:
C
Explanation:
how can drip irrigation be useful in farming
Answer: It helps control the water better and more efficiently. It also helps to save water
Explanation:
A garden supply company has an advertisement selling beneficial bacteria. They claim that the bacteria will help gardeners grow better gardens because of better soil. What can some bacteria do for soil?
increase clay content
provide water
slow down weathering
improve fertility
Answer:
D. improve fertility
Explanation:
A garden supply company has an advertisement selling beneficial bacteria. They claim that the bacteria will help gardeners grow better gardens because of better soil.
This claim is simply based on the premise or fact that some bacterias can improve fertility of the soil.
Some species of bacterias are living microorganisms that are capable of decomposing organic matter into nitrogen, carbon and other nutrients, which are then released into the soil in a plant available form when in excess and this cycle continues with reproduction of new bacterias.
Some examples of these bacterias are Klebsiella, Anabaenopsis, Beijerinckia, Azotobacter, Clostridium, Anabaena, Nostoc, Bacillus etc.
Outline THREE adaptations of terrestrial plants for their survival in their habitat.
Answer:
Stomata for gas exchange, water resistant waxy cuticles on leaves and specialized cells for support.
Explanation:
Plants have undergone several modifications for life on land. These include the development of several mechanisms:
a waxy, thick water-repellent cuticle- the thick cuticle provides a barrier to water loss from plant tissues in the leaf. stomata- these moderate the evaporation of water, an important commodity to land dwelling terrestrial organisms. They also regulate gas change cells to provide strength and rigidity- plant cells are specialized cells that contain lignin and cellulose, these are rigid provide good support against gravitational forces, Without them the stem would break and the cells would readily lose waterWhich idea explains Darwin’s observations about Galapagos Islands finches?
A) biological species concept
B) ecological species concept
C) endangered species extinction
D) sympatric speciation
Answer:
I think the answer is A) biological species concept
find the kinetic energy of a ball of mass 200 grams moving at a speed of 20m/s
Answer is 40J...............
Approximately 50 million acres of tropical rainforest are cleared each year. Which effect most likely would result from the clearing of these forests?
a. A decrease in soil erosion
b. An improvement in water quality
c. A decrease in biodiversity
d. An improvement in air quality
Answer:
A.
Explanation:
The effect most likely would result from the clearing of these forest is A decrease in soil erosion.
What is reforestation and why is it important?
Reforestation is of great importance in combating climate change. In the increase of water resources, in the reduction of damages in agriculture related to floods, in the increase of the sustainable stock of legal wood, in the sequestration of CO2 and reduction of the greenhouse effect.
Reforestation consists of repopulating deforested areas to recover forests that were destroyed in the recent past.
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What is noise pollution?