Which of the following organisms exhibits meroblastic cleavage?
a. echinoderms
b. amphibians
c. mollusks
d. annelids
e. birds
E
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Even though plants cells photosynthesize, they still use their mitochondria for oxidation of pyruvate. This will occur in _____
A) photosynthetic cells in the light, while photosynthesis occurs concurrently B) nonphotosynthesizing cells only C) cells that are storing glucose only D) all cells all the time E) photosynthesizing cells in the light and in other tissues in the dark
Which animal from the list below relies the most on instinctive behavior?
A. jellyfish B. trout C. bear D. robin
Sulfa antibiotics damage bacteria by affecting a certain bacterial enzyme. The sulfa antibiotic looks similar to a substrate normally required by the bacterial cells to live
The sulfa antibiotic occupies the active site of the required enzyme and blocks entry of its normal substrate. This prevents the bacteria from making nucleotides that are required for their reproduction and survival. Based on this information, the action of sulfa antibiotics is an example of A) activation energy. B) denaturing of proteins. C) electron carriers. D) competitive inhibition.
Changes to an organism's DNA can cause unexpected traits to be expressed in its offspring. DNA in an individual's gametes will most likely be altered before being passed to offspring if exposed to
A. x-rays B. loud sounds C. magnetic fields D. extreme temperatures