C4 photosynthesis is an adaptation to hot, dry conditions in which:
A. oxygen is stored in the root
B. light energy is stored in chloroplasts
C. CO2 is fixed and stored in the leaf
D. water is stored in the stem
Answer: C
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In some specialized cells of eukaryotes, a very high level of gene expression can be achieved when DNA is copied repeatedly without cell division for example, some insect larvae maximize production of salivary proteins by means of this process:
a. activators binding to enhancers. b. polytene chromosomes. c. transport protein binding. d. expression of micro RNA. e. post translational modifications.
If the carrying capacity of species 2 was actually 50, what would the competitive outcome be?
A) Both species coexist. B) Species 1 wins. C) Species 2 wins. D) Both species go extinct.
The heart of a microarray is a small piece of ____________________ on which single-stranded fragments of DNA are
attached at a spot called a field. Fill in the blank(s) with the appropriate word(s).
Answer the following questions true (T) or false (F)
1. Ciliates often have two kinds of nuclei that have different functions. 2. In fungi, aseptate hyphae are coenocytic by definition. 3. Algae can have different types of photosynthetic pigments that allow them to photosynthesize at various depths in water.