When the guard cells of a leaf shrink, how do the stomata change?

A) They open.
B) They close.
C) They perform photosynthesis.
D) They die.


B

Biology & Microbiology

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A team of researchers is studying the external structures on the dorsal (back) surface of a spider mite. The spider mite seems to be the habitat of an even smaller mite, which is approximately 0.05mm. While they can see the dorsal surface of the spider mite with their naked eye, they cannot see the mite clearly. The researchers are writing a grant to provide support for a microscope to use to

study these new mites. They need to purchase a microscope with a high magnification to observe the new mites on their habitat. Based on the information given, what type of microscope would you suggest? A. scanning electron microscope B. no microscope is powerful enough to see the smaller mite C. binocular compound light microscope D. transmission electron microscope

Biology & Microbiology

Most of the following homeostatic responses of animals are obligate. Select the exception

a. carbonic acid buffering system regulating pH of blood b. basking in the sun c. shivering when cold d. kidneys regulating the osmotic content of blood e. closing of capillaries near the skin in the cold

Biology & Microbiology

A condition called ____________________ results in individuals having both male and female sexual structures at

different times in their lives Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

The trait of medium-sized leaves in iris is determined by the genetic condition PP'. Plants with large leaves are PP, whereas plants with small leaves are P'P'. A cross is made between two plants each with medium-sized leaves

If they produce 80 seedlings, what would be the expected phenotypes, and in what numbers would they be expected? What is the term for this allelic relationship?

Biology & Microbiology