Imagine that you are studying a new species. As you examine the circulatory system, you note that the diameter of the vessels grows smaller and smaller as you move farther from the heart, but the blood is always contained within vessels. If you want to place this new species into a group whose membership is solely based on whether the animals included share this described type of circulatory system, which animals would be included in this group? Check all that apply.
_____ all mollusks
_____ frogs
_____ fish
_____ housefly
_____ all mollusks
__X__ frogs
__X__ fish
_____ housefly
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The E-site
A. is found on the RNA polymerase enzyme. B. is responsible for the release of the tRNA. C. is found on the 35S polysome. D. is the aminoacyl site. E. is responsible for the release of the tRNA AND is the aminoacyl site.
Which group of gymnosperms resembling small palms produce pollen and gametophytes on separate male and female plants, are usually pollinated by beetles?
A. Ginkgos B. Gnetophytes C. Ferns D. Cycads E. Ephedras
During operant conditioning, the stimulus-response connection is weakened by repeated punishment.
Answer the following statement true (T) or false (F)
When animal cells are grown in a petri dish, they typically stop dividing once they have formed a single, unbroken layer on the bottom of the dish. This arrest of division is an example of
A) mitosis S phase. B) density-dependent inhibition. C) lack of nutrients.