Which of the following statements about comets is true?
A.
Comets are mostly made up of rock. They are usually very hard to see, but as they approach the Sun the rock heats up and becomes much easier to see.
B.
Comets are mostly made up of rock. They are usually very easy to see but as they approach the Sun the rock condenses and becomes much harder to see.
C.
Comets are mostly made up of dust particles, frozen water and frozen gases. They are usually very easy to see but as they approach the Sun these particles condense and become much harder to see.
D.
Comets are mostly made up of dust particles, frozen water and frozen gases. They are usually very hard to see, but as they approach the Sun these particles heat up and become much easier to see.

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.

What happens during interphase? (1)the nucleus grows to its full size. (2)the cell grows to its full size. (3)the nucleus divides into two nuclei. (4)the cell divides into two cells.

Discuss cell surface transport in the structure of constituents