A feedback system controls the menstrual cycle. How does a female resp

when the luteinizing hormone level drops sharply?

O A. Her progesterone level drops sharply.

B. She ovulates.

C. She menstruates.

D. Her estrogen level drops sharply.

Small, unchanged substance enter and leave the cell membrane through the process of

1. How are small scale endothermic and exothermic reactions beneficial to humans in environments where there are limited amounts of resources? If so, how?

A human sperm cell has Select one: a. 23 paired genes. b. 23 unpaired chromosomes. c. 46 paired chromosomes. d. 46 unpaired genes. straighterline

What is the main function of Ribosome, and Nucleus?

What adaptation leave posses for maximum absorption of light

Which biome receives 200 to 400 cm of rain per year? A) deciduous forest B) temperate rain forest C) taiga D) grassland

Which of the following statements violates the cell theory? A) Mitosis produces new cells identical to the parent cell that divided to make them. B) Viruses are not considered to be living organisms, because they are smaller than a cell.

One scientist discovered a new theory on the evolution of the universe. What is the next step for the scientist to take?

Darwin and the theory of evolution a. True b. False worksheet

The cross-section, or diameter, of the hair shaft is much larger in coarse hair than in which of the following? A. Fine hair B. Gray hair C. Curly hair D. Blonde hair