In the lungs, oxygen diffuses into the bloodstream, and carbon dioxide diffuses out through _[blank]_.

veins

alveoli

arteries

kidneys

Explain how blocked coronary vessels can lead to a myocardial infarction, a heart attack.

Compare primary and secondary succession. What is the distinction between them? Primary succession is the sequence of species that become established early in a newly colonized area, and secondary succession is the sequence of species that move in

A Punnett square A) computes the probable genotype of future offspring. B) identifies the gene locus where allelic variations are possible. C) directly examines a fetus for genetic abnormalities.

Why do plant cells need chloroplasts? Explain.

Does a fly have external plates that support and protect

Describe how the population of the Earth increase if the number of children being born is less?

What is defined as all of the living and non-living components of a particular geographic area?

Most reptiles and all birds are, meaning that their young develop in fertilized eggs laid outside the mother's body. in contrast, most mammals are, meaning that their young develop inside the mother's body.

What is heamoglobin

In the following experiment, what is the independent variable? Dr. Honeydew would like to test the effect of chlorine on Beaker's hair color. To test this he pours heavily chlorinated pool water on the right side of Beakers head.