Parasitism usually affects populations in a ________ manner.
A. random
B. inverse density-dependent
C. cyclic
D. density-independent
E. density-dependent
Answer: E
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Describe the process of how four different embryo sac cells become differentiated
What will be an ideal response?
Answer the following statements true (T) or false (F)
1.During development, bone becomes progressively more calcified and hardened. 2.An individual skeletal muscle is separated from others by the connective tissue sheath which wraps it. 3.The basic job of skeletal muscle is to pump blood through the body. 4.When a motor neuron stimulates a muscle fiber, the fiber contracts. 5.The membrane of a muscle cell makes a deeply indented set of B tubules where a motor neuron contacts it.
Leaves
a. intercept sunlight. b. of some species form toxins. c. actively orient relative to the sun to favor optimal position. d. come in simple and compound forms. e. fit all of these descriptions.
The ATP generated from cellular respiration is not sufficient to drive the Calvin cycle in plants, even if appropriate levels of NADPH and CO2 are present. Why not?
A. Cellular respiration and photosynthesis do not happen in the same cells in plants B. Breaking down sugar to provide the energy needed to synthesize sugar would be a futile cycle C. Plants do not undergo cellular respiration D. The Calvin cycle requires more ATP than can possibly be made from cellular respiration