About one-third of all animal and plant species are concentrated on ________ of Earth's land
A) 20%
B) 10%
C) 5%
D) 1.5%
Answer: D
You might also like to view...
Which soil horizon has no organic matter or
weathered rock? a. A b. B c. C d. D e. E
Which event in the sequence of photosynthesis occurs before all the others in the list?
a. Energy carrier molecules ATP and NADPH are created b. Water is broken apart to donate an electron inside the thylakoid space c. Photons of light stimulate pigments within the thylakoid membrane inside of a chloroplast d. Electrons are transported down an electron transport chain e. Carbon dioxide is converted into sugar.
Which of the following best describes the hypoglycemic effect of insulin?
A) Insulin allows entry of glucose into most body cells. B) Insulin encourages catabolism of glycogen into glucose. C) Insulin encourages synthesis of glucose from lactic acid and noncarbohydrate molecules. D) Insulin encourages release of glucose into the blood by liver cells.
G protein-coupled receptors are the largest family of cell surface receptors. Each receptor passes through the plasma membrane how many times?
A. Seven times B. Three times C. Once D. Five times