A student lists statements about how a species adapts to the environment. One statement needs to be edited for accuracy. 1. Variation in a species occurs from predictable mutations.
2. Variation exists in the phenotypes of the species.
3. Physical characteristics influence an organism’s ability to utilize resources.
4. Physical characteristics affect an organism’s ability to reproduce.
Which statement should be edited, and what should the change be?
A. Statement 1—Variation in a species occurs from random mutations.
B. Statement 2—Variation exists in the genes of the species.
C. Statement 3—Physical characteristics influence an organism’s ability to find resources.
D. Statement 4—Behavioral characteristics affect an organism’s ability to reproduce.

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

the correct answer is d