23. Fossils are rare because:

a. Only certain parts of organisms can fossilize

b. Very few organisms have died

c. They are only found in North America

d. Fossils are very common, silly

C. the absorptive cells that line the wall of the intestine are called

How does earths solid inner core affect seismic waves

Anthocyanin is a pigment that gives flowers and leaves purple colors. The M gene codes for a transcription factor (Myb) that promotes expression of an enzyme that produces anthocyanin.

What is unique about visible light in the electromagnetic spectrum? A. It has the lowest wavelength. B. It has the highest energy. C. It is the only portion of the spectrum we can see.

Do you believe a Fungus is more closely related to the plant or animal kingdom? What evidence proves this?

Two species of crickets are indistinguishable (identical) to one another except for their mating songs, which have noticeably different pitches. Thus, the crickets will not mate.

How have human activities affected the phosphorus cycle?

Many animals such as goats, deer, and cattle have horns or antlers. What purpose do these structures serve? Question 7 options: They are used for ornamentation and for attracting a mate.

Which of the following is not a characteristic shared by all chordates? fins hollow nerve chord pharyngeal pouches notochord

Alicia is not sure of the difference between a food web and a food chain. write a paragraph for alicia that explains the difference between a food web and food chain.