Correctly order the steps involved cellular immunity:.
A. The Tc recognizes the infected host cell.
B. The Tc interacts with epitope presented by MHC-I on the dendritic cell.
C. The Tc secretes perforin and granzyme, causing apoptosis.
D. The helper T cell activates the Tc cell.
1. 1,2,4,3.
2. 4,2,1,3.
3. 2,4,1,3.
4. 2,1,3,4.

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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