The word eukaryotic refers specifically to a cell containing
(a) photosynthetic membranes.
(b) a true nucleus.
(c) a cell wall.
(d) none of the above.
(b) a true nucleus.
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It’s your turn to clean out the refrigerator in the lab break room again, which is definitely your favorite way to spend a Friday afternoon. While you are contemplating moldy peaches, and your own disappointment at the lack of a limerick, you glance at the pantry door, from which has appeared a stream of ants carrying bits of cereal and crackers. You follow the ants out the door, down the hall, to a supply closet, where you find they’ve established a colony in a case of printer paper. If these were just any ants, you’d put in a ticket for an exterminator and go home, but alas!; they’re endangered Cube Farm Ants, which means the pantry and supply closet are now wildlife preserves. The thought of all the paperwork you’re going to have to fill out almost ruins your entire
weekend, until you realize you are standing in the middle of a fantastic pun – what is it? a. biodiversity hotspot b. closet species c. wildlife corridor d. ecological niche
What is the annual precipitation of the Arctic tundra?
a. Less than 25 centimeters b. Between 130 - 200 centimeters c. Between 25 - 100 centimeters d. Less than 10 centimeters e. Between 25 - 60 centimeters
A fruit, such as a strawberry, that develops from tissues of the receptacle as well as the ovary would be
considered a(n)
a. aggregate fruit. b. accessory fruit. c. multiple fruit. d. simple fruit. e. compound fruit.
In prokaryotes new mutations accumulate quickly in populations, while in eukaryotes new mutations accumulate much more slowly. The primary reasons for this are
A) Prokaryotes have short generation times and large population sizes. B) Prokaryotes have random mutations while eukaryotes can target genes for mutations; thus mutations may not accumulate as quickly in eukaryotes but they are more useful to the organism. C) The DNA in prokaryotes is not as stable as eukaryotic DNA and is thus more likely to mutate. D) Prokaryote mutations are less effective than eukaryote mutations in providing variation for evolution.