bio midterm

scientists have studied plant and animal cells under a microscope. Which of the following statements have they observed to be true? Select all that apply.

• Both plant and animal cells have a nucleus and nucleolus.

• Plant cells have chloroplasts while animal cells do not.

• Both plant and animal cells have mitochondria.

• Some plant cells have cilia and flagella.

• Plant cells contain plastids while animal cells do not.

Offspring that are genetically unique are the result of _________.

• sexual reproduction

• mitotic reproduction

• asexual reproduction

• vegetative reproduction

Toby is observing his dog and a houseplant. Which characteristics of life do they share in common? Select all that apply.

• Made of cells

• move

• show sensitivity

• maintain homeostasis

• grow

Which of these shows the correct sequence of events in the cell cycle?

• M, G2, G1, S

• G1, S, G2, M

• S, G2, M, G1

• M, G1, G2, S

A frog has a diploid number of 26 chromosomes. How many possible distributions of chromosomes can occur in the homologous pairs of a frog’s gametes?

• 26

• 2

• 8192

• 278

Which of these describes a macromolecule?

• Large molecules made of smaller subunits

• Molecules with a polar head and nonpolar tails

• A molecule composed of hydrogen, carbon, and oxygen

• A molecule that catalyzes a reaction in living organisms

What type of carbon based molecule is the first to be broken down by the body's cells to provide a source of energy?

• Fat

• Protein

• Amino Acid

• Carbohydrates

Select all that apply. A DNA molecule was evaluated under an electron microscope for its makeup. What is the scientist most likely to find if it is indeed a DNA molecule?

• thymine

• cytosine

• deoxyribose

• uracil

• a phosphate group

Which phrase best describes the process of meiosis?

• occurs in body cells

• produces haploid gametes

• results in genetically identical cells

• only in halploid cells

In order to find the best nesting sites and fewest predators, a group of arctic gulls moves further and further north. The birds only begin breeding once they reach their isolated nesting grounds. Over a long time, how would you expect their appearance to change with respect to the original gull population?

• They will look the same, with no change

• They will look similar, with little change

• They will look different, with few changes

• They will look completely different and be unrecognizable