Answer:
A
Explanation:
Natural selection occurs when an environment makes organisms with certain traits more likely to survive and reproduce.
Asexual reproduction results in no genetic variation (meaning differences in traits, also called divserity). Genetic variation must be present for certain organisms to be better suited to their environment, because in its absence all organisms share the same traits. This rules out B, C, and D. I hope this helps :)
The answer is A The amino acid inactivates the repressor
4. A section of DNA that codes for a specific trait.
Answer: The given statement is true.
Explanation: Ionization energy is defined as the amount of energy required to remove an electron from the outermost shell of an isolated gaseous atom.
General equation of ionization energy is given by:

- If the outermost electron is loosely bound to the nucleus which means that the electron can be easily removed form an atom, it will require less amount of ionization energy.
- And if the outermost electron is tightly bound to the nucleus which means that the electron cannot be removed easily from an atom. And hence, it will require more ionization energy.
Hence, the given statement is true.
The most familiar non-vascular plants that contain simple conducting cells are Mosses. Most non vascular are bryophytes and are small in size, they lack vascular tissues and also lack true leaves, seeds, and flowers. Instead of roots, the have hair-like rhizoids that functions to anchor them to the ground and to absorb water and mineral salts from the soil. They are three types, mosses, hornworts and liverworts.