If one were to inject cytoplasm containing Bicoid into the middle of a Drosophila egg immediately prior to fertilization, the embryo would
A. develop normally.
B. try to form posterior structures in the middle of its body.
C. try to form anterior structures in the middle of its body.
D. not develop at all.
Answer: C
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During the follicular phase of the menstrual cycle, a number of events occur which are listed below. Select the answer that places the events in the correct chronological order
Events: 1. the lining of the uterus thickens 2. granulosa cells secrete estradiol 3. FSH acts on granulosa cells 4. LH levels surge rapidly then decline 5. ovulation occurs A. 3, 2, 1, 4, 5 B. 3, 1, 2, 4, 5 C. 1, 2, 3, 4, 5 D. 2, 4, 3, 1, 5 E. 4, 3, 2, 1, 5
Virulence may be measured experimentally at the host level by the ________, which measures the number of pathogens that kills 50% of an experimental group of hosts within a specified amount of time.
Fill in the blank(s) with the appropriate word(s).
In humans, skin color is controlled by several genes. Thus, skin color is a(n) ____ characteristic.?
a. dominant
b. co-dominant
c. epistatic
d. pleiotropic
e. recessive
Steroid hormones bind with G-protein linked receptors in plasma membranes of target cells
____________________ Indicate whether the statement is true or false.