Mhc class ii will interact with a tcr and

question 20 options:

a)

cd8 on the surface of cytotoxic t-cells

b)

cd4 on the surface of cytotoxic t-cells

c)

cd4 on the surface of t-cells

d)

cd8 on the surface of t-cells

In eukaryotes, genetic information is passed to the next generation by processes that include mitosis or meiosis. which of the explanations identifies the correct process and supports the claim that heritable information is passed from one generation to another? a. mitosis, followed by cytokinesis, produces daughter cells that are genetically different from the parent cell, thus insuring variation within the population. b. during mitosis, dna replication occurs twice within the cell cycle to insure a full set of chromosomes within each of the daughter cells produced. c. in asexual reproduction, a single individual is the sole parent and passes copies of its genes to its offspring without the fusion of gametes. d. single-celled organisms can fuse their cells, reproducing asexually through mitosis to form new cells that are not identical to the parent cell.

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

What was the land like over 500 million years ago? what was under the sea?