A vein is a blood vessel that always carries

a. blood toward the heart.
b. blood away from the heart.
c. oxygen-rich blood.
d. oxygen-poor blood.


c

Biology & Microbiology

You might also like to view...

Evidence that sleep has an inherited component is that

A) MZ twins share more sleep characteristics than do DZ twins. B) siblings often go to sleep and wake up at the same time. C) people with insomnia have the same chromosome abnormality. D) DZ twins share more sleep characteristics than do MZ twins.

Biology & Microbiology

Glucose is absorbed through the membranes of the

small intestine primarily by a. osmosis. b. bulk flow. c. transport proteins. d. endocytosis. e. facilitated diffusion.

Biology & Microbiology

Based on your understanding of mitosis, explain the function of this process, where it takes place, and the result of doing this type of cell division?

What will be an ideal response?

Biology & Microbiology

Assume that the ancestor of this phylogeny had vascular tissue and chlorophyll. If this is true, which answer lists all key traits of a ginkgo?

A. Tree and seeds B. Needles, tree, and seeds C. Vascular tissue, needles, tree, and chlorophyll D. Seeds, tree, vascular tissue, and chlorophyll

Biology & Microbiology