Three students collected a live planarian from a lake. They used a medicine dropper and placed the specimen of planaria in a petri dish. Then they placed a small piece of black construction paper over half of the petri dish. The planarian reacted by moving away from the light. What can you conclude from the reaction of the planarian?
a) light has no effect on planaria
b) planaria react slowly to stimuli
c) planaria prefer light to darkness
d) planaria prefer darkness to light
Answer: d) planaria prefer darkness to light
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A. are actively pumped against their concentration gradient. B. spontaneously move down their concentration gradient. C. spontaneously move against their concentration gradient. D. are actively pumped down their concentration gradient. E. are in the resting potential state.
A rare, X-linked dominant condition in humans, congenital generalized hypertrichosis, is marked by excessive hair growth all over a person's body. Which of the following statements about this condition is INCORRECT?
What will be an ideal response?
What is the correct way to denote the scientific name of a microbe?
A. e. Coli B. E. Coli C. E. coli
Describe the pathway and process involved in a hormone being released and reaching a target cell.
What will be an ideal response?