Which scenario describes an interaction between the system responsible for nutrient absorption and the system responsible for fighting illness?
a) food molecules are broken down at a faster rate to increase an organism's body temperature
b) hormones travel through the blood to alert cells to absorb glucose
c) the stomach responds to signs of a pathogen by forcing its contents back through the esophagus
d) all of the other answer choices
Ans: c) the stomach responds to signs of a pathogen by forcing its contents back through the esophagus
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A mutagen that inserts between the stacked bases of a DNA double helix, distorting the DNA to induce single-pair insertions or deletions is called a(n) ________ agent.
A. intercalating B. insertional C. distortional D. interspersing
Your friend has never gardened before. When none of the seeds he planted germinate, he asks you to suggest why. Which is the best explanation of what occurred?
A. The monocot seeds he used were only able to produce a single cotyledon each. B. The seeds were planted too deeply and used up their reserves before reaching the surface and sunlight. C. The suspensor failed to develop into an embryo within each seed. D. All seeds require fire in order to germinate. E. Seeds take more than one season to germinate.
A network of protein filaments called ____ lines and reinforces the inner surface of the nuclear envelope in animal
cells.
a. actins b. chromatins c. lamins d. tubulins e. lamellae
A ________ layer consists of diffuse unorganized polysaccharide material that lies outside the cell wall and is easily removed.
Fill in the blank(s) with the appropriate word(s).