Human influenza viruses are usually derived from influenza viruses that infect
A. horses and sheep.
B. cattle and water buffalo.
C. a variety of primates.
D. birds and pigs.
E. chimpanzees and gorillas.
D. birds and pigs.
You might also like to view...
In the early twentieth century, ____ discovered that genes are carried on chromosomes
a. Thomas Hunt Morgan b. Francis Crick c. Gregor Mendel d. James Watson e. Thomas Huxley
Plant cells called ____ make up the bulk of the soft primary growth of roots, stems, leaves, flowers, and fruits
a. sclerenchyma b. tracheids c. collenchyma d. parenchyma e. vessel members
When a plant zygote first forms, it starts to develop and elongate after mitosis begins
a. True b. False
When you feel threatened, the
neurotransmitter, ___, is released from ___ neurons and your response is to fight or flee.
a. acetylcholine--sympathetic b. acetylcholine--parasympathetic c. norepinephrine--sympathetic d. serotonin--sympathetic e. serotonin--parasympathetic