Answer:
tundra is 1,700,
Explanation:
The biodiversity of the tundras is low: 1,700 species of flora and only 48 land mammals can be found, although thousands of insects and birds migrate there each year for the marshes. There are few species with large populations.
The answer is letter D.
A group of white blood cells that has of small and large lymphocytes.
The small lymphocytes bear variable cell-surface receptors for antigen and are
responsible for adaptive immune responses. There are two main group of small
lymphocyte—B lymphocytes (B cells) and T lymphocytes (T cells). Large granular
lymphocytes are natural killer (NK) cells, lymphocytes of innate immunity.
Answer:
Proteins.
Explanation:
They are called membrane proteins.
Answer:
Cardiovascular system
Explanation:
Cardiovascular means relating to the heart and blood vessels. Even though blood system sounds like an appropriate name, the circulatory system studies more than just blood, it studies the heat and blood vessels as well.
