D) differences between species and their ancestors
This is because of the adaptive mechanism and mutations the organisms have to respond to. <span>Adaptation processes occur to help species survive and thrive in the ecological balance of life. Structural adaptations are physical features of an organism that adapted through time. An example of this are the bills of a bird and the fur of bears that they generally need for their survival; birds for hunting, and bears to protect them from low climate areas.</span>
Answer:
control group
Explanation:
The control group is exposed to the same conditions as the experimental group, except for the variable being tested.
Answer:
The effect of protein disulfide isomerase on insulin signifies that the active conformation of insulin is not the most thermodynamically favored form. The main reason behind this is that the protein disulfide isomerase seems to decline the free energy, that is, it makes them more steady form predominant.
In the case of insulin, the prevalence of the stable form results in its inactivation. Thus, it signifies that the active form is not thermodynamically stable.
Answer:
boiling, freezing, refridgeration, and fertilizer.
Explanation:
the first three have to do with temperature, which tends to kill bacteria. Pesticides kill bacteria by poisoning them
The major function of the contractile vacuole of amoeba is osmoregulation. The solute concentration found in the cell of amoeba's cytoplasm is more than the solute concentration in the freshwater that surround the external part of the organism, thus, water enter the cell through osmosis. The contractile vacuole collect the excess water and expel it through an opening in the cell membrane. By doing this, the contractile vacuole maintains the water balance in amoeba. This how the contractile vacuole normally operate.
In a situation where amoeba is placed in seawater, then water from the cell cytoplasm will rush out of amoeba cell, because of the higher salt content of the surrounding medium. The contractile vacuole will respond to the situation by increasing its contraction and pumping water out the cell in an accelerated manner, this will lead to the shrinking of the cell.
