In a hydrangea plant, the color blue (B) is dominant to the color white (b). What is the probability that offspring will be blue?
a. 75%
b. 50%
c. 25%
d. 100%
a. 75%
In a hydrangea plant, the color blue (B) is dominant to the color white (b). There is a 75% probability that offspring will be blue.
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Biosphere 2 was an attempt by scientists to build a completely closed ecosystem in Arizona. It failed
because of the
a. decreased level of oxygen through respiration by soil microorganisms. b. contamination of food by soil microorganisms. c. disease outbreak caused by soil microorganisms. d. increased level of carbon dioxide produced by photosynthetic microorganisms. e. inability of soil microorganisms to recycle nitrogen.
T cells will begin to secrete cytokines when
bound to which of the following?
a. a MHC-antigen complex b. a receptor-antigen complex c. an antigen directly bound to the surface of a transport vesicle d. an antigen directly bound to the surface of a macrophage only e. another T cell only
The _____ is a long tube, about 6 meters or 20 feet in length, coiled into a small crescent-shaped region on the top and side of the testis.
A. epididymis B. urethra C. seminiferous tubule D. seminal vesicle
Neutrophils fight bacteria without phagocytosis by producing (MACs/NETs/PAMPs).
Fill in the blank(s) with the appropriate word(s).