Where are the stem cells that replace old blood cells located in adults?

Structures in plant leaves open and close to maintain homeostasis are called

Different mating times, either seasonal or diurnal versus nocturnal, are examples of what type of a. a. isolation? b. temporal isolation c. geographic isolation d. habitat isolation e. depression isolation f. mechanical isolation

What bonds to guanine (G) in DNA?

What are rocks made up of

The centromere joins the sister chromatids in the middle during the

The minimum amount of energy the body uses at complete rest is known as the energy balance. resting metabolic rate. metabolic balance. basal metabolic rate.

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.