Answer:
It is called the S-A node, or rather sinus node.
Answer: The correct options are C and E.
Explanation: When the rattlesnake population increases, the population of grasshopper and prairie dog are also decreases.
Both grasshopper and prairie dog are herbivores and eaten by rattlesnake. When rattlesnake population increases they feed on grasshopper and prairie dog and decrease occurs in their population.
Answer: natural selection
ATMOSPHERE LAYERS: Troposphere, Stratosphere, Mesosphere and Thermosphere
hope this helped :) pls give brainiest
Answer:
<h2>an organism in which both copies of a given gene have the same allel is homozygous. </h2>
