Biology Honors

Sandworms live on the seafloor. They absorb oxygen and excrete wastes through their skin. Which characteristic will best help the worm carry out these functions?

large surface area compared to body volume

Which of these best describes a species?

organisms that can breed and produce fertile offspring

Which example represents chemotaxis?

A bacterium swims towards higher concentrations of glucose.

A section of DNA has these bases: TAG CAG TAC Which mRNA sequence is produced from this DNA section?

AUC GUC AUG

Which is true of the earliest classification system?

All organisms were classified as either plants or animals.

Scientists have discovered a prokaryotic organism that thrives in hot water around 90°C (194°F) and does not need sunlight or oxygen to live. Into which kingdom would the scientists classify this organism?

Archaebacteria

How can cells from the same organism have such different shapes and functions?

During differentiation, different parts of the DNA in each type of cell are activated, resulting in the different structure and function of the cells.

Which of the following is active transport?

Endocytosis

Why does evolution by means of natural selection act at the population level and not at the individual level?

Individuals cannot change inheritable traits.

Why are many farmers encouraged to plant different types of crops on the same land throughout the year?

It helps to preserve the quality of the soil.

What adaptation do land plants for reproduction?

Pollen

During hibernation, mammals remain dormant for months at a time. Which process allows them to survive during hibernation?

Their body temperature decreases to conserve energy

What activity most contributes to the depletion of the ozone layer?

release of CFCs

When worker bees return to the hive, they perform a sequence of movements called a waggle dance to show other members of the colony where food is located. Which type of behavior does this best illustrate?

social behavior

What determines the function of a specialized cell?

the active genes in the cell

Which characteristic of mitochondria and chloroplasts led scientists to believe that the two organelles evolved through the symbiotic relationship between two prokaryotic organisms?

the development of bilayer membranes

What carries the instructions for making amino acids in a protein?

the sequence of nitrogen bases on the mRNA