Which is a characteristic of all annelids?
a. They have a visceral mass.
b. They have a segmented body.
c. They move with a muscular foot.
d. They surround their body with a mantle.
e. They have an open circulatory system.
b
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Within this community, which would be the fittest organisms?
a. The weeds with herbicide resistance because they survive when herbicides are sprayed. b. The weeds without herbicide resistance because they are producing the most surviving offspring. c. Any organism that reproduces is considered fit in the evolutionary sense. d. If herbicide resistance arose due to a mutation, this species would be considered less fit
How is Geobacter able to generate energy for fuel cells?
What will be an ideal response?
What structure functions in gas, nutrient, and waste exchange between the fetal and maternal blood?
In a forest, trees that grow taller receive more sunlight and end up producing more viable seeds. Shorter trees of the same species receive less sunlight and produce few viable seeds. Over time, what type of selection will take place?
A. disruptive selection B. directional selection C. stabilizing selection D. sexual selection E. artificial selection