Answer:
because their parents genes are different
Explanation:
because we all come from different people. we have different genes.
The correct answer is C - carbon dioxide.
The distribution of gases in the earth's atmosphere is as follows:
1. Nitrogen - 78 %
2. Oxygen - 21 %
3. Argon - 0.93 %
4. Carbon dioxide - 0.038%
Nitrogen, oxygen and argon are permanent gases whose percentage in the atmosphere does not change from day to day.
Gases such as carbon dioxide, nitrous oxides, methane, and ozone are known as trace gases which make up 0.1% of the atmosphere.
Answer:
e) all of the above are methods of hormone action
Explanation:
Hormones are the chemicals that are secreted by endocrine glands mostly. They serve to regulate physiological processes. Most of the lipid-soluble hormones such as steroid hormones enter the target cell to bind to their cytosolic or nuclear receptors and alter the expression of genes. These hormones stimulate the expression of some genes and inhibit that of others.
Binding of hormones to the cell surface receptors associated with ion channels regulates their opening and closing and thereby affects the membrane permeability. Likewise, the active hormone receptor complexes regulate the electrical signaling pathways of muscles and neurons.
Answer:
the answer is A
Explanation:
the cell membrane is like a shield to the cell.
Answer:
The correct answer is option (E) that has three types of neurons: sensory neurons, interneurons, and motor neurons.
Explanation:
Nervous system consist of nerve cells which are responsible for carrying messages from one part of the body to another.
There are three types of neurons present in nervous system i. e. sensory neurons, interneurons, and motor neurons. Sensory neurons carry impulse from body parts to the brain, motor neurons carry instructions from brain to body parts and interneurons make a connection between sensory and motor neurons.
