Which of the following organisms is likely to have the least complicated form of cell division?
a. a shelf mushroom
b. a flowering oak tree
c. a disease-causing bacterim
d. a grizzly bear
Answer: c. a disease-causing bacterim
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How does the phenomenon of horizontal gene transfer muddle the concept of monophyletic groups?
A. Horizontal gene transfer makes it impossible to distinguish monophyletic groups. B. Monophyletic groups are based on the concept that a particular group of species descended from a common ancestor. When horizontal gene transfer occurs, not all of the genes in a species were inherited from the common ancestor. C. Since horizontal gene transfer includes transfer from one group of species to another group with a common ancestor, there is no muddling of the concept of monophyletics. D. All of these are correct.
The site of gravity reception in roots is the:a
root apical meristem. b. periderm. c. root epidermis. d. root cap. e. root hair
What do scientists utilize A. tumefaciens for?
What will be an ideal response?
What is the function of the kinins released when mast cells degranulate?
A) activation of the complement system B) increased vascular permeability C) smooth muscle contraction D) increased production of tears and saliva E) chemotactic factors