(please help!) Chimpanzees, chickens, cows, and human beings all share a gene for an insulin hormone. What does this suggest? (1 point) a. This suggests that none of these species share a common ancestor.

b. This suggests that all of these species share a common ancestor.

c. This suggests that two of these species share a common ancestor.

d. This suggests that three of these species share a common ancestor.

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.

1. the geologists have established a set of principals that can can be used o determine the relative ages of rock. this principal is applied to sedimentary and volcanic rocks. the rocks exposed to wall of grand canyon has layers and by studying the number of horizontal layers in the rock(strata) the relative age can be determined. the layer first formed will appear at the bottom and the the layer of strata last formed appear at the top. by using this information the approximate age of rocks can be determined.

2. carbon dating is used to find the relative age of rock in numbers which means for the rocks that has age between 1-70,000 years.

3. for the rocks of age range between 1,000 - billion of years potassium-argon dating is used.

e2020 answer: spores

pteridophytes

bryophytes

nonvascular

vascular