An independent individual that possesses the characteristics of life is called a(n)
a. cell.
b. organism.
c. organ.
d. tissue.
e. atom.
B; Some students may be tempted to select choice a (cell) because there are many unicellular organisms. However, this would not be the best answer because in a multicellular organism, each individual cell is not independent.
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In addition to the clonal deletion of self-reactive T cells that occurs during embryonic development, autoreactivity of T cells and B cells is also inhibited by T ________ cells.
What will be an ideal response?
Microbes are energetically powerful!
What will be an ideal response?
A population with an S-shaped growth curve is said to exhibit _____________ growth.
a. logistic b. density-dependent c. exponential
Fertilization typically occurs in the ____.
A. ovary B. oviduct C. uterus D. cervix E. vagina