About how much time did it take for the ancestors of modern giraffes to evolve the long necks of modern giraffes?

A. a year

B. many decades

C. hundreds of years

D. millions of years

Why do cells produce more atp under aerobic conditions than under anaerobic conditions?

Which of these structures is found in the stomach but nowhere else in the alimentary canal? A. an oblique muscle layer B. a lining of columnar epithelium C. a circular muscle layer D. mucus-forming cells

Draw conclusions: how well did the punnett squares predict the offspring percentages for each parent pair?

How are the two bacterial kingdoms different from the four other kingdoms

Which of the following statements is correct? The earth is cooled by terrestrial radiation. The earth's temperature is not affected by solar radiation. The earth is heated by terrestrial radiation.

Process in which homologous chromosomes exchange portions of their chromatids during meiosis ancwer

Select the best answer for the question 14. If you read a nutrition label from your favorite package of cookies and it says that each cookie contains 180 Calories, how many calories (lowercase) does it contain? O A. 180,000 cal O B. 1,800 cal O C.

What is defined as all of the living and non-living components of a particular geographic area?

How to communicate with an adolescent about taking a urine smailpe?

Why might a scientist conduct an experiment in the lab, and then repeat the experiment in the field?