Activation of B lymphocytes produces (antibody-mediated /cell-mediated/innate) immune responses.

Fill in the blank(s) with the appropriate word(s).


antibody-mediated

Biology & Microbiology

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Answer the following statements true (T) or false (F)

1. Hagfish are craniates but are not vertebrates. 2. A hagfish is a not a fish. 3. Lampreys' main body support is the notochord, not a vertebral column. 4. Sharks have cartilaginous skeletons because bone-forming ability had not yet evolved in vertebrates when they originated. 5. The swim bladder is an organ in primitive fish from which the lungs of terrestrial vertebrates developed.

Biology & Microbiology

Angiosperms have two types of xylem tubes, each composed of one cell type, either ____ or ____

a. vessel elements; companion cells b. sieve elements; companion cells c. sieve elements; tracheids d. vessel elements; sieve elements e. vessel elements; tracheids

Biology & Microbiology

In directional selection, both phenotypic extremes are equally selected against

Indicate whether the statement is true or false

Biology & Microbiology

The blastocoel is:

A) a fluid-filled cavity. B) the group of cells that form the archenteron. C) a fertilized egg. D) a hollow sphere of cells.

Biology & Microbiology