What distinguishes a free-living flatworm from other organisms?
A) A tubular gut
B) Eyespots
C) A cuticle
D) A coelom
E) Hooks
B
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If a cell was to stop dividing, in which part of
the cell cycle would it stop?
a. G1 b. S c. G2 d. telophase e. prophase
In its youth, a pet parrot was owned by someone who kept the wings clipped and never allowed it to fly. Later in life, the new owner let the feathers grow and let the parrot fly around the house. But the parrot kept knocking over lamps and crashing into walls. "Wow," said the owner, "I guess parrots are just too clumsy to fly around a house without destroying everything." What is an alternative explanation?
A. In nature, parrots have much more room to fly, and do not have to navigate around delicate home decor. B. Since the parrot was not able to practice flying during the critical period for flight development, the brain circuits for accurate flying were not able to develop. C. The parrot just needs more practice flying -- although it did not get to fly when young, this should not affect later ability. D. The critical period for flying development in the brain has just now begun with the bird's first attempt. In a few weeks the critical period will end, so it must practice during this time. Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about behaviors in an adult parrot based on how it was raised? What other information is related to the question? Choose Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection on Process: Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In what way does caffeine affect the urinary system?
A. Caffeine increases the actions of ADH causing the proximal convoluted tubule to reabsorb less water which leads to an increased amount of urine formation. B. Caffeine blocks the actions of ADH causing the glomerular capsule to reabsorb less water which leads to an increased amount of urine formation. C. Caffeine blocks the actions of ADH causing the distal convoluted tubule and collecting duct to reabsorb urine formation. D. Caffeine increases the actions of ADH causing the distal convoluted tubule to reabsorb less water which leads to an increased amount of urine formation. E. Caffeine blocks the actions of ADH causing the proximal convoluted tubule to reabsorb more water which leads to a decreased amount of urine formation.
Neither Wallace nor Darwin discussed genes when describing natural selection. Why?
What will be an ideal response?