A population of rabbits lives in a forest. The habitat features many small spaces for hiding. Over many generations, the average size of the rabbits gets smaller and smaller. What type of selection is this?

The disulfide bridges between subunits of cholera toxin (ctx) represents which level of protein organization?

Recently the classification system of life was changed to include not five but six kingdoms, as well as three domains. Earlier classification attempts were based on structural features, both current and fossilized.

Three sources of floodwaters are

All of the rocks are removed from a desert ecosystem what would happen to the population of rock dwelling lizards and intern the animals which eat them?

Which of the following can increase as a result of stratospheric ozone depletion and can contribute to the melting of glaciers? A. radioactive decay B. ozone accumulation C. the intrusion of magma D. incoming solar radiation

pigments that trap sunlight are called

What is the relationship between the five factors of soil development? A They all interact with one another to create soil. B Soil doesn't need any of these factors to develop. C Only time is important; the other factors don't need to be there.

Which provides the largest source of dissolved oxygen in the ocean

What are RNA used for?

What did frederick griffith want to learn about bacteria?