Which term below is LEAST like the others?
A. species
B. subspecies
C. variety
D. clone
A. species
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Embryonic development is orchestrated by a cascading series of genes, the expression of many of which are controlled in time and space by transcription factors and effector molecules of various kinds
But what controls the expression of the first regulatory genes to be transcribed in the newly fertilized zygote?
Deforestation:a
retards soil erosion. b. releases carbon dioxide that may contribute to global warming. c. has no effect on the extinction of biological species. d. promotes the preservation of tropical birds. e. is only a threat to tropical rain forests.
The cell organelle that synthesizes carbohydrates and secretes cell products is the:
While you are riding the ski lift up to the top of the mountain on a very cold day, you start to shiver involuntarily. You know that the shivering is your body?s attempt to help regulate your body temperature and is an example of what type of mechanism?
A. energy utilization B. evolutionary adaptation C. sensitivity D. homeostasis