Which simple excretory system is present in the flatworm?
A. Malpighian tubules
B. nephron
C. protonephridia
D. nephridia
Answer: C
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Researchers who study molecular evolution often analyze DNA sequences using computer programs which identify homologous sequences
Indicate whether the statement is true or false
DNA is found in its condensed form known as a chromosome in which of the following stages of the
cell cycle?
a. prophase only b. prophase and metaphase c. interphase d. throughout the cell cycle e. throughout mitosis until late telophase
Which of the following allows a virus to attach to a host cell?
a. A viral receptor must be present on the host cell. b. The cell must be in the process of apoptosis. c. The virus uses its tail fibers to cling to the cell. d. The cell must be already engaged in endocytosis.
If a parent cell has 22 chromosomes, the daughter cells following meiosis II will have
a. 22 chromosomes. b. 44 chromosomes. c. 11 chromosomes. d. All of these are correct.