In which situation would you find parent-offspring conflict?
A. A goat weaning her two kids off milk
B. Fish mass spawning offspring upstream in a river
C. A male lion becomes head of the pride and kills cubs sired by his predecessor
D. Meerkats teaching their young to hunt
Ans: A. A goat weaning her two kids off milk
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In DNA the purines are
a. thymine and cytosine. b. adenine and cytosine. c. adenine and guanine. d. thymine and adenine. e. guanine and thymine.
Suppose the amount of water that has evaporated from the ocean has increased per unit of time. What can be expected to happen at points B and E in the accompanying diagram?
What will be an ideal response?
Which one of the following statements accurately reflects the nature of mature communities?
A) Mature communities have more consumers than producers, because the producers are so efficient. B) Mature communities develop very quickly. C) Succession begins once a mature community has been established. D) Mature communities are so well established that when disturbed, they quickly recover. E) Mature communities are the most efficient in terms of energy utilization and exhibit the greatest species diversity.
The family Staphylococcaceae respire using oxygen as the terminal electron acceptor, although some can reduce nitrate to nitrite.
Answer the following statement true (T) or false (F)