Biology Pearson Study Guide

Homeostasis is a living organism's

ability to maintain constant internal conditions even when environmental conditions change.

True or False? After the first meiotic division, the cells are diploid, because the chromosomes are duplicated

False

True or False? In mitosis, the DNA is replicated once, while in meiosis it is replicated twice.

False

True or False? The daughter cells after the first division of mitosis and meiosis are identical.

False

True or False? The daughter cells will become diploid when the second meiotic cell division occurs

False

Increases genetic variation

Both crossing over and independent assortment

result(s) in chromosomes that have alleles from both the mother and the father.

Crossing over

Occur(s) because of the way chromosomes line up on the metaphase plate at metaphase I.

Independent assortment

True or False? After the first meiotic division, the cells are haploid because they have only one chromosome of each original homologous pair.

True

True or False? After the second meiotic division, the cells are haploid as they have only one of each homologous chromosome pair.

True

Which of the following can be found in bacteria, but not viruses?

a cell membrane

Which of the following is NOT a characteristic of living things? -creating energy -having DNA as a genetic code -being capable of reproduction -responding to stimuli -exhibiting complex organization

creating energy

Viruses are -not alive because they can only carry out photosynthesis and not cellular respiration. -alive because they mutate and change over time through evolution. -alive because they often contain DNA. -not alive because they are not made of cells and require a host cell for reproduction.

not alive because they are not made of cells and require a host cell for reproduction

Ensure(s) that the daughter cells are genetically identical to each other and to the parent cell.

Neither crossing over nor independent assortment