Why are the male testes located in the scrotum outside the body?

The main function of organelles is

1. Which of the following is not a characteristic of life? A.) maintains homeostasis B.) composed of cells C.) composed of atoms D.) carries out metabolism

Jeff's father has Huntington disease, which is caused by a rare autosomal dominant allele (H). Two-thirds of people with the dominant Huntington allele show no symptoms by age 50, and Jeff is 50 and has no symptoms. Jeff's wife is is pregnant.

Which of the following molecules is most likely to passively diffuse across the plasma membrane? A. Hemoglobin B. DNA C. Sodium ion D. Carbon dioxide E. Glucose

What is the name of a tropical region that has a distinct wet and dry season A. tundra B. desert C. steppe D. savanna

Cells in multi-cellular organisms A) All look the same B) All have the same function C) Are often quite different from each other D) Are the same size in every part of the organism

Why is it necessary to cool a hot supersaturated solution slowly during a recrystallization?

Name the two energy-equivalent molecules that contain three phosphates as part of their structure. what makes these two molecules different? how many high energy phosphate bonds do they contain? nutrition

During what period of time has the sunbelt region of the u. s. grown most quickly?

The axial skeleton includes the A) vertebra, skull, and ribs B) hip bones, knees, and feet C) shoulder bones, elbows, and hands D) bones of the fingers and toes