Many scientists believe dinosaurs became extinct due to:
It’s widely acknowledged that the Earth was a cold, dark place after a giant meteor, measuring roughly six miles across, struck Mexico about 66 million years ago, which many believe triggered what is known as the end-Cretaceous mass extinction.
<span>The organism enables itself to adapt to the environment's harsh conditions.
Adaptation is the unique trait that animals and plants have in order to survive through the evolution of time. Some animals that live in cold ranges around the world are an example of this adaptive trait. Alpine animals that are found in mountain ranges are exposed to the very cold temperature and the ultraviolet wavelengths of the sun. Most alpine animals have extra layers of fat and fur to protect them from the harsh environment. They also have shorter limbs (e.g. legs, ears, tail) to prevent heat loss. </span>
The answer to this question would have to be D) A car is red.
*Genetic determinism of sexes
*Two types are known.
I. Drosophila met at mammals , insects and some plants.
a) Chromosomes have notation:
Masculine ⇒ xy
Feminine⇒xx
II. Abraxas met at amphibians,reptiles,birds and fish.
a) Chromosomes have notation:
Masculine⇒xx
Feminine⇒xy
So we know that to transport materials in or out of the cell, we need to have access to both the inside and outside of the cell. This would require that the protein be a transmembrane protein that reaches both the inside and the outside of the cell.
So in this case, let's look at pore proteins. These are proteins that cross a membrane and act as a pore for the materials that need to cross the membrane.
One example of a pore protein is an aquaporin. These proteins aid in the transport of water into or out of a cell.
Therefore, the answer to your question is: A) Pore proteins.