On hot, dry days, guard cells often close microscopic openings in plant leaves, conserving water. this is an example of
a. environmental factors causing gene mutation
in plants
b. finite resources acting as selecting agents for
evolution
c. a feedback mechanism for maintaining homeostasis
d. differentiation in plants as a result of stimuli
Answers: 1
Biology, 22.06.2019 09:00
Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm
Answers: 1
Biology, 22.06.2019 21:30
When one dna molecule is copied to make two dna molecules, the new dna contains a) 25% of the parent dna. b) 50% of the parent dna. c) 75% of the parent dna. d) 100% of the parent dna. e) none of the parent dna.
Answers: 2
Biology, 22.06.2019 22:10
Red blood cells are responsible for transporting oxygen in the blood. people with sickle cell anemia were born with a defective gene that results in sickle-shaped red blood cells. individuals with the disease often suffer pain in their extremities due to the build-up of these cells causing blockages in the blood vessels. the shape of the blood cells also reduces the amount of oxygen transported in the blood.
Answers: 1
On hot, dry days, guard cells often close microscopic openings in plant leaves, conserving water. th...
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