Most cells of higher plants have a cell wall outside the plasma membrane. What is the function of the cell wall?
What will be an ideal response?
Ans: The cell wall provides a rigid, protective shell for the cell. It is porous, allowing water and
small molecules to pass readily, but it is rigid enough to resist the swelling of the cell caused by the accumulation of water.
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To which class of neurotransmitters does substance P belong?
a. acetylcholine b. monoamines c. amino acids d. neuropeptides e. gaseous neurotransmitters
Which of the following is most true of sexual reproduction?
A) Sexual reproduction allows for more rapid population growth than does asexual reproduction. B) Only half of the offspring from sexually reproducing females are also females. C) Asexual reproduction produces offspring of greater genetic variety. D) Sexual reproduction is completed more rapidly than asexual reproduction. E) Asexual reproduction is better suited to environments with extremely varying conditions.
The oviducts are not attached to the ovaries.
Answer the following statement true (T) or false (F)
Which of the following statements is not true concerning the fluid transported by the system depicted
in Figure 44-1? a. It accumulates in a blood cavity called a hemocoel. b. It is also called hemolymph. c. It can be found in grasshoppers. d. It has hemoglobin as the oxygen transporting pigment. e. It fills spaces called sinuses.