Antibodies are
A. forms of vaccines
B. type of cells that protect the body
C. viruses that cause diseases
D. foreign substances that stimulate an immune response
E. proteins that protect the body
Ans: E. proteins that protect the body
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Which statement describes a difference between human male and female somatic cells?
a. Male somatic cells contain only paternal chromosomes; female somatic cells contain only maternal chromosomes. b. Male somatic cells contain 46 chromosomes; female somatic cells contain 44 chromosomes. c. Male somatic cells contain 44 chromosomes; female somatic cells contain 46 chromosomes. d. Male somatic cells contain two X chromosomes; female somatic cells contain an X chromosome and a Y chromosome. e. Male somatic cells contain 22 pairs of homologous chromosomes; female somatic cells contain 23 pairs of homologous chromosomes.
It is discovered that a chromosome from the cells of a particular organism is made up of a strand of DNA that is 500 base pairs long. If 30% of the DNA molecule is determined to be made up of adenine, how many of the bases would you expect to be guanine?
What will be an ideal response?
A killing frost is an example of a density-independent factor. Indicate whether the statement is true or false
What carries instructions for making proteins from the nucleus into the cytoplasm?
a. ATP b. ribosomes c. DNA d. Rough ER e. mRNA