The meiosis that produces the microspores is
indicated by
a. A.
b. B.
c. C.
d. D.
e. E.
Answer: b
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In four o'clock plants, reciprocal crosses are performed with a green plant and a white plant. How will the offspring of the reciprocal crosses look?
A) The offspring of both crosses will be green. B) The offspring will be white if the egg came from the white plant and green if the egg came from the green plant. C) The offspring will be white if the sperm came from the white plant and green if the sperm came from the green plant. D) The offspring of both crosses will be variegated.
Curtis and McIntosh created a scale of an environmental gradient based on changes in physical characteristics or community composition along that gradient. What term did they apply to this index?
A) the climax index B) the continuum index C) the successional index D) the tolerance index
A patient arrives at a hospital. Doctors take samples and send them to the lab. The lab does 2 test on the samples. I. after gram stain, they found purple bacteria and II. microscopic examination found rod morphology the infecting organism in the patient has
a. mycelia acid b. peptidoglycan c. teichoic acids d. B and C e. A and C
What is the difference between a tissue and an organ system?
A) An organ system includes tissues. B) Tissues are not composed of cells, but organ systems are composed of cells. C) Tissues are composed of organ systems. D) A tissue cannot exist unless it is part of an organ system, but an organ system can exist independently of tissues.