Answer:
There are four categories for air masses: arctic, tropical, polar and equatorial. Arctic air masses form in the Arctic region and are very cold.
Answer:
The answer is A. Fertilized ovules
Answer:
B)attach specifically to host cell receptors
Explanation:
Viral spikes are one of the envelope proteins. These proteins are coded for by viral genes. Viral spikes project from the envelope surface. They are also called peplomers. One of the functions of these spikes is to specifically interact with the receptors present on the surface of the host cell to mediate the attachment of the virus to the host cell surface. Viral spikes and the host cell surface receptors are complementary to allow their specific binding. For example, the spike protein of the SARS-coronavirus bind specifically to the human host cell receptor ACE2.
The answer is a generalist, able to be flexible in major dimensions of its niche. In addition, as coyotes extended their variety they also extended their set menu. As soon as omnivores restricted by the grassland fauna of rabbits, mice, and insects they now resourcefully consume the whole thing from small mammals and birds to livestock and animals, bounties and vegetables, meat and trash. Their environment has also extended to contain a collection of natural and social altered environments as well as the woodlands, the savannahs and the swamplands, the parks and the golf courses, the suburban backyards, and the urban expansions.
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A
