The main structure for gas exchange in plants is called the
A. mesophyll.
B. chloroplast.
C. stomata.
D. epidermis.
E. root.
C. stomata.
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All atoms tend to fill their outer energy levels with the maximum number of electrons, usually eight. Depending on whether atoms satisfy the octet rule will predict:
A. the chemical behavior of the atoms. B. whether they will be found in nature. C. whether they will dissolve in water. D. their radioactive energy.
What are plasmids?
a. They are circular strands of DNA found in bacteria. b. They are vectors of diseases. c. They are a type of virus. d. They are genetic clones of bacterial chromosomes.
Removing a nucleosome from DNA to expose a promoter is an example of ____
a. induction b. dedifferentiation c. post-transcriptional regulation d. gene silencing e. chromatin remodeling
The most dangerous outcome of a Taenia solium infection occurs when
A. larvae cross the placenta. B. eggs are ingested. C. larvae enter the body through intact skin. D. cysticerci are ingested. E. the host immune system fails to react against it.