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3 years ago

10

What are sudden large declines in biodiversity in the fossil record called? A. mass evolution B. mass decline C. mass increase D

. mass extinction

1 answer:

svetoff [14.1K]3 years ago

8 0

The answer would most likely be D. Mass Extinction

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Ecological succession that occurs in an area where no ecosystem existed before (such as bare rock with no soil) is called:

Brilliant_brown [7]

D<span>. </span>Primary succession<span> / </span>secondary succession<span> e. Genetic drift / </span>primary succession<span>. </span>d<span>. ... A predictable series of </span>environmental<span> changes </span>occur<span> in an </span>ecosystem<span> after a ... An </span>area<span> of </span>bare rock<span> outcrop is colonized by small lichens and mosses for ... Weed seeds will </span>not<span> disperse over a large enough </span>area<span> to colonize a prairie. a.</span>

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2 years ago

A scientist notices that the level of toxic chemicals in an algae plant is 400 ppm.

olchik [2.2K]

Answer:

C

Explanation:

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2 years ago

The fact that some people enjoy skydiving while others regard it as terrifying, shows that

Nostrana [21]

C.stressors are activities that can cause danger

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2 years ago

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One of the grand challenges in biology is understanding how the first cells formed on Earth. Since all cells are bound by a cell

coldgirl [10]

<h2>Answer is option "A"</h2>

Explanation:

Oils and fats, which in science are called lipids, are known as amphipathic molecules. These molecules have two distinct ends to them: a water-loving (hydrophilic) side and a water-fearing (hydrophobic) side. While the hydrophilic sides of a lipid will associate with the water in a solution, the hydrophobic sides of the lipid all cluster together to 'hide' from the water. Lipids therefore cluster together and form spheres where the hydrophobic sides are in the center away from the water while the hydrophilic sides are on the outside, associating with the water.
The ability of the atoms within a group to form hydrogen bonds with the water molecules around them makes them hydrophilic. Oxygen and nitrogen atoms readily form hydrogen bonds with water molecules, so any organic molecules that have oxygen or nitrogen atoms bound to their carbon skeletons will be hydrophilic.
For example, if we take the molecule for cholesterol, we see the OH group on the left is hydrophilic and will form hydrogen bonds with water, while the ring structures, which only consist of hydrogen and carbon atoms, are hydrophobic and will not associate with the water.
There are many different kinds of lipids with different functions. Lets start by examining phospholipids, which compose the cell membranes of animals. They form lipid bilayers, with one set of hydrophilic heads facing the exterior of the cell membrane and the other set facing the interior (as you can see on the diagram on screen). The hydrophobic portions of the lipid bilayer - the lipid tails - face towards one another, which allows them to hide away from the water inside and outside of the cell.
So,the right answer is option A "amphipathic molecules".

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3 years ago

Why insects are the most diverse animals that live in all habitats?

enyata [817]

Insects has a broad range of species and they are able to easily adapt according to their surroundings, hence increasing their survivability rate

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3 years ago