Answer:
d.Different sets of genes.
Explanation:
A cell normally only expresses a percentage of its genes and various cell types are created by the expression of distinct gene sets. In addition, in response to changes in their environment, cells can alter the pattern of genes they express, such as signaling from neighboring cells.
Answer:true
Explanation:
Because we already used the oxygen from the blood to breathe (i think)
The answer is A. They have a hydrocarbon backbone that can be chemically altered.
Aerobic Respiration
*Oxygen is present when this form of respiration takes places
*In this form of Respiration gases are exchanged
*it can be easily found in the cytoplasm and mitochondria
*glucose breaks down into carbon dioxide and water
*all higher organisms such as mammals have this type of respiration.
Anaerobic Respiration
*Oxygen absent
*Gases aren't exchanged
*found only in the cytoplasm
*Glucose breaks down into ethyl alcohol, carbon dioxide and energy
*bacteria and yeast use this type
