Which layer of soil is least likely to be penetrated by plant roots?

a.

O (organic matter)

b.

A (topsoil)

c.

B (subsoil)

d.

C (parent rock)

Should we not assume that just as the eye, hand, the foot, and in general each part of the body clearly has its own proper function, so man too has some function over and above the function of his parts?

During pregnancy, which hormone is responsible for stimulating maturation of the breast for lactation?

Which of the following organisms is NOT part of a trophic level? a. decomposers b. consumers c. sunlight d. producers

Which best describes a group of organisms that is considered a species

Which of the statements is false? A. As food passes through the liver, it is mixed with bile, which breaks large clusters of fats into smaller droplets. B. Lipases in the small intestine break lipids into glycerol and free fatty acids. C.

When dna fragments are separated by gel electrophoresis, the longest fragments move fastest?

The network of neurons surrounding the central core of the brain that includes the hypothalamus, amygdala, and hippocampus is the

How does water pollution seem to be affecting diversity in some streams

A scientist studying algae growth in a coral reef observed that the presence of a certain type of zooplankton inhibited the algae growth. The scientist hypothesized that the zooplanton was eating the algae.

What is the purpose of soap (lysis agent) in the extraction of DNA?