Is it possible to prevent mutations entirely? What will be an ideal response?
No, it is not. DNA polymerase is not perfect and as a result it introduces mistakes (mutations) each
time it copies a cell. However, you can reduce the number of mutations experienced by avoiding
undue exposure to ionizing radiation, UV radiation and chemical carcinogens.
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Which is an example of a clumped distribution of a population?
A. A tree species releases a poison to defend the soil around its roots, resulting in trees spaced evenly like a grid. B. Antelope travel in herds. C. Two male hummingbirds have a confrontation on the border between their territories. D. Multiple species join each other at the waterhole to drink.
The evolutionary relationships between the eukaryotic supergroups are depicted in the diagram.Which of the following pairs of protists would be most closely related due to both of them possessing plastids?
A. archaeplastids & rhizaria B. archaeplastids & stramenopiles C. amoebozoans & excavates D. rhizaria & amoebozoans
Angiosperms differ from other plants in that they
A. lack chlorophyll. B. have vascular tissue. C. produce spores abundantly. D. have flowers.
ZPA cells of the chick embryo produce which morphogen?
A) bicoid B) chicken wing factor C) sonic hedgehog D) sonic chicken