There are over 2000 kinds of edible insects in the world, and they are becoming an increasingly popular source of protein. One cup of cricket flour contains over 28 grams of protein. The building blocks of the protein in cricket flour are*

Which list contains only abiotic conditions that might be found in a pond ecosystem?*

Protein synthesis is accomplished primarily by the interaction of which two cell structures?*

Identical twins were separated at birth and raised by two different families. Years later, one twin was a physically fit member of the cross-country team, and the other twin was overweight with slightly higher-than-normal blood pressure. The differences in these twins could be explained by the fact that*

The diagram below represents various factors in an area.

The diagram best represents*

Traits are passed from parents to offspring. These traits are determined by*

In which cell structure is energy extracted from nutrients?*

The diagram below represents a food web in a pond ecosystem.

Two carnivores in the food web are*

Dodder plants consist of tangled masses of yellow, leafless vines and contain few chloroplasts. The vines twist around and grow into the stems of other plants and absorb water and nutrients from them. Which statement best describes this relationship?*

Two kittens in a litter are genetically different from each other and from their parents. These genetic differences are most directly due to*

A genetic change that occurs in a body cell of a mouse will not contribute to the evolution of the species because*

Scientists who have examined the fossil record have noted that some species have changed very little over long periods of geologic time. The lack of change in such organisms is most likely because*

Doctors often use certain medications to treat infections. A few people have a reaction to some of these medications, such as itching, swelling, or trouble breathing. This is an example of*

Organisms that live on land rarely compete for*

Orcas are endangered whales. Only about 80 individuals remain off the coast of Washington State. Salmon are a source of food for orcas. Some individuals are proposing that four dams in Washington State be removed so that habitat areas for salmon will be increased. Those opposed to the dam removals say that the dams provide low-cost hydroelectric power and positively influence the local economy.

This situation is an example of*