The absence of ________ leaves obligate anaerobes susceptible to killing by oxygen
A) carotenoids
B) superoxide dismutase
C) peroxidase
D) vitamin E
E) catalase
B
Bloom's Taxonomy: Comprehension
Section: Growth Requirements
Learning Outcome: 6.4
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In the early plant embryo, cells divide asymmetrically. Which structure does not result from divisions of the apical (terminal) cell?
A) the suspensor B) the cotyledons C) the hypocotyls D) the shoot
When interspecific interactions involve more than just two species, they are said to be ________
Fill in the blank(s) with correct word
Bacterial cells are placed into a 250 mL liquid growth medium in a closed laboratory flask. According to Malthusian theory, they will reproduce exponentially and then
A. continue reproducing arithmetically as long as there are no limitations on food supply. B. continue reproducing arithmetically until the food supply is used up, then they will cease to grow. C. continue reproducing geometrically as long as there are no limitations on food supply. D. continue reproducing geometrically until the food supply is used up, then they will cease to grow.
In which of the following ways does a root
differ from a shoot?
a. a root only has apical meristems -- a shoot could have both b. a root lacks an epidermis- a shoot does not lack an epidermis c. roots lengthen when cells above the apical meristem elongate- in shoots, cell elongation below the apical meristem causes the shoot to lengthen d. in a root the apical meristem at the tip never changes its position- in shoots the apical meristem does change its position as the stem elongates e. all of these are differences between roots and shoots