A heterozygous fruit fly with normal wings and a gray body (VvBb) is crossed with homozygous flies with vestigial
wings and black bodies (vvbb). This type of cross is known as a:
a. monohybrid cross.
b. dihybrid cross
c. polytropic cross.
d. true breeding cross.
e. chromosomal cross
b
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Invertebrates have an adaptive immune system and an innate immune system
Indicate whether the statement is true or false.
Insulin affects the
a. secretion of saliva. b. storage of proteins. c. secretion of pancreatic juices. d. metabolism of sugar. e. utilization of fat reserves
During transcription of the trp operon, pairing of regions 2 and 3 in the leader peptide mRNA creates a(n) ________ signal
A) continuous B) termination C) antitermination D) induction E) repression
Which of the following is the main component of cell membranes?
A. phospholipids B. steroids C. cholesterol D. sucrose E. triglycerides