In higher animals, including humans, meiosis results in the production of
a. egg cells (ova).
b. gametes.
c. sperm cells.
d. all of the above.
d
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Protective membranes called meninges surround the spinal cord as well as the _________
Fill in the blank(s) with the appropriate word(s)
A student designed an experiment to see if plants grow better when watered with a sugar solution. He divided the plants into six groups, measured the initial height of each plant, and calculated the average height for each group. Once a week for two months, he watered the plants in each group using a different sugar solution for each plant group. At the end of two months, he measured the final height of each plant and calculated the average height for each group. The student’s data are shown in the table below.
Which of these statements explains why the plants in Groups E and F died? A. The high sugar content caused too much water to move out of the root cells. B. The high sugar content caused too much water to move into the root cells. C. The high sugar content prevented the plant from capturing energy. D. The high sugar content clogged the pores in the cell membranes
Which one of the following rows correctly identifies a monocot?
A. Row 1
B. Row 2
C. Row 3
D. Row 4
Rhodopsin in the vertebrate retinal photoreceptor cells results in a change in the second messenger _______, leading to the opening of ion channels in the plasma membrane and the production of a nerve impulse.
a. Ca2+ b. cAMP c. cGMP d. IP3