Genetic variation leads to genetic diversity in populations and is the raw material for evolution. Biological systems have multiple processes, such as reproduction, that affect genetic variation
They are evolutionarily conserved and shared by various organisms. Which statement best represents the connection between reproduction and evolution? A) Plants that use sexual reproduction are rare since this type of reproduction in plants does not contribute to genetic diversity.
B) In order to increase genetic diversity for evolution in sexually reproducing organisms, mutations must occur in the zygote after fertilization.
C) Since prokaryotic organisms reproduce asexually, there is no mechanism for them to add genetic diversity for evolution.
D) Sexual reproduction increases genetic variation because random mutations can be shuffled between organisms.
D
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Unique features of the planctomycetes include ________.
A. a membrane-bound nuclear region B. resistance to ionizing radiation C. their size: some are as large as protozoa D. twitching fimbriae that are required for motility
Answer the following statements true (T) or false (F)
1. Valley fever is another name for cryptococcosis. 2. The yeast form of Histoplasma capsulatum is quite distinctive because of its large capsule. 3. Both histoplasmosis and cryptococcosis may be acquired by inhalation of dried bat droppings (guano). 4. Molds in the genus Mucor are commonly referred to as bread molds. 5. If a patient is infected with a dimorphic fungus, it is likely that fungal hyphae would be seen in the infected tissues.
After mitosis, the chromosome number of a descendant cell is _____ the parent cell's
a. the same as b. one half of c. rearranged compared to d. doubled compared to e. less than
Why is it unlikely that we will find fossils of
every extinct species?
a. Most dead organisms are eaten by scavengers. b. Organic remains decompose. c. Not all species have hard parts like bones or teeth. d. Most fossils are buried too deep for us to find. e. More than one of these is correct