What is the function of heart valves?

They return blood to the heart.

They force blood to flow out of the heart.

They regulate the heart rhythm.

They prevent blood from flowing backwards.

In which structure atp or adp is more energy stored

What do the large optic lobes of a frog brain suggest?

The action potential in a cardiac contractile cell causes

Which are possible outcomes of a mutation in a gene that codes for a transcription factor? The ability of the transcription factor to bind to DNA may be destroyed. The ability of the transcription factor to bind to DNA may be reduced.

Name the biome that has cold winters, warm summers, moderate seasonal precipitation, fertile soils and occasional wildfires.

The size of a maternal (mother) or paternal (father) chromosome dictates which side of the cell equator it will gravitate towards during metaphase I. True False

What kind of doctor is neil shubin

How do cells become specialized for different functions?

Organisms do not adapt as a result of competition for resources. true or false

How do most cancers arise? question 1 choices choice a., from a single mutations arising simultaneously in a cluster of cells choice b., from a series of mutations that arise in the descendants of a single somatic cell choice c.