Answer: c
Explanation: Plants and animals need nitrogen to make proteins but they cannot take it in from the air. Because nitrogen is unreactive as a gas, it has to be transformed into a new molecule. When bacteria in the soil takes nitrogen from the air, it becomes nitrates. Finally, it can move through the food chain in this form.
Answer:
option D
Explanation:
Negative feedback is a mechanism in which function of a cell or an organ is decreased. It lessened the output of a system and maintain system function which is known as homeostasis. It is a regulatory mechanism of normal physiology. Some of examples are
blood sugar level regulation, regulation of blood pressure, thermoregulation and many more.
I think that b is the correct
Answer:
<em>The correct option is B) The genes that a person has</em>
Explanation:
Genotype can be described as the genes which are present in a person. The alleles which make up the genes of a person are referred to as the genotype of a person. Hence, option B best describes a person's genotype. The genotype of a person encodes for the different genes which make the mRNA in an organism. These mRNA then make particular proteins in that organism.
In contrast, phenotype depicts the traits which are attributed to a person.
