The cladogram above diagrams the evolutionary history of chordates. Which group of animals was the first land dweller? A) birds B) mammals C) lungfish D) amphibians

The body size of the individuals in a population of crabs starts decreasing. A geneticist believes that interbreeding with a smaller species may have happened. A marine biologist believes that the crabs may be undernourished.

What tone would you use to read a speech about the positive effects of biodiversity in Africa? a. persuasive c. scientific b. humorous d. none of the above

Think of an activity that involves work. write about how work is transferring energy and where the transferred energy goes.

Difference between a cast and a mold

What are two ways bacteria provide nutrients to humans?

Many people in the developing world who depend on rice in their diet suffer from diseases related to deficiencies of

Why does biology have to be a subject

Differential reproduction of genotypes leads to evolution via what process? inbreeding natural selection genetic rescue genetic drift mutational load

Why is carbon essential to all known life on Earth?

Why are only inherited traits involved in the process of evolution?