Bacterial conjugation involves
A. new progeny cells with genes from two parent bacterial cells.
B. the take-up of naked DNA fragments from a lysed donor cell by a recipient cell.
C. a donor cell that transfers a copy of a plasmid to a recipient cell through a pilus.
D. bacteriophage carrying donor DNA to the recipient cell.
Answer: C
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A) HIV B) HLA C) antibody D) erythrocyte
If tall (D) is dominant to dwarf (d), and two homozygous varieties DD and dd are crossed, then what
kind of offspring will be produced? a. all intermediate forms b. all tall c. all dwarf d. 1/2 tall, 1/2 dwarf e. 3/4 tall, 1/4 dwarf
An autosomal dominant condition that causes a person to grow no taller than about 4 feet 4 inches is
a. Marfan syndrome. b. Tay-Sachs disease. c. Huntington disease. d. achondroplasia. e. phenylketonuria.
Net primary productivity refers to all the energy in the plants and animals in a food chain at any particular time
Indicate whether the statement is true or false