How do plant and animal viruses differ in their mode of entry into host cells?
What will be an ideal response?
Animal viruses enter host cells through binding host membrane proteins. Plant viruses enter a plant through a physical wound in the plant (e.g. caused by insects, pruning, etc).
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DNA replication occurs during the __________ of the cell cycle
a. S phase b. G1 phase c. G2 phase d. interphase
The purpose of the clinical microbiology laboratory is to maintain cultures of microorganisms.
Answer the following statement true (T) or false (F)
The production of pollen, seeds, and flowers attributed to the widespread distribution of angiosperms. Why is the production of pollen an advantage?
A. It allows fertilization in the absence of water. B. It allows fertilization in moist areas. C. It promotes pollination. D. It is necessary for sexual reproduction. E. It protects and nourishes the embryo.
The first jawless fishes evolved by about ____ million years ago
a. 120 b. 270 c. 380 d. 480 e. 650