Evolution of a body cavity is important for several reasons. List three.
What will be an ideal response?
(1) Fluids moving within the body cavity serve as a circulatory system for circulation. (2) Fluid in the body cavity makes the animal's body turgid or rigid, permitting muscles to work against something for movement. (3) Organs can function within the body cavity while being cushioned by the fluid, so a body cavity promotes organ function.
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The barrier between the intracellular and extracellular fluid compartments in an animal or plant is the:
A. plasma membrane. B. walls of capillaries. C. nuclear membrane. D. membrane of the endoplasmic reticulum. E. membrane of the Golgi apparatus.
Chapter 12 includes a discussion of the various defense mechanisms utilized by plants. Onion
plants have developed several creative means of discouraging their consumption by herbivores. The cells of the edible portion of the onion contain several different substances:alliinase (an enzyme) and sulfur compounds derived from the soil. When the cells of the onion are ruptured (as when they are bitten into by an animal), the substances combine. From your knowledge of onions, how would the new substance created by this combination deter its future consumption?
What will be an ideal response?Blood pressure drives the first step in urine formation, called _____________________.
A. tubular reabsorption B. antidiaresis C. tubular secretion D. glomerular filtration E. aldosterone processing
Which of the following is a potential consequence if people stop using technology in the agriculture industry?
What will be an ideal response?