Chemical messages originate from

a. DNA

b. E. R.

What effect does Earth's spherical shape have on the amount of sunlight that reaches the equator? A. The latitudes near the equator receive direct sunlight, which causes a high-pressure system. B. C.

Anemia includes a lack of WBC's

Water and dissolved mineral nutrients enter the plants vascular tissue extracellularly through the

Because plants do not have skeletons, what accounts for their rigidity?

Strawberry plant clones

Which scientist disproved the ideas of spontaneous generation

Many fault lines are obvious at the surface. How can the epicenter of an earthquake be located miles away from the fault line?

The harmless scarlet kingsnake has scales in a coloration and pattern resembling the scales of the dangerous coral snake. The scarlet kingsnake is using to avoid predation

Charles Darwin came up with the system we use to name and classify organisms. True False

8. Cystic fibrosis is caused by a recessive allele. The frequency of this allele is 0.1 in a population of 2,500. a. What is the frequency of the dominant allele? b. How many people in this population will have cystic fibrosis? c.