The genotype is fixed at the moment of ____________________ and, barring mutation, is unchangingFill in the blank(s) with the appropriate word(s)


fertilization

Biology & Microbiology

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Living members of the lineage ____ are jawless vertebrates called lampreys, which are mostly parasitic as adults. They have shards of cartilage that partially cover the nerve cord, which may represent an early stage of the evolution of vertebrae.

a. Petromyzontoidea b. Placodermi c. Cephalochordata d. Urochordata e. Myxinoidea

Biology & Microbiology

Vasodilation occurs due the response of _____ to the activation of complement.

A. macrophages B. helper T cells C. basophils D. neutrophils

Biology & Microbiology

A doctor's office has run out of the latest flu vaccine, but many patients are asking for it. One of the nurses finds some vials from last year's batch in a refrigerator. Should they be used?

A. Yes, because the preservatives and refrigeration ensure that the vaccine is still fresh. B. No, because each year the technology to make a good vaccine improves. C. Maybe - the vaccine should be mixed in a test tube with the virus to see if it still inactivates it. D. No, because each year the vaccine is made against different subtypes of the flu virus.

Biology & Microbiology

Why might spinach be more nutritious than iceberg lettuce?

What will be an ideal response?

Biology & Microbiology