Science Benchmark Review Part 2 (Jones) Question Preview (ID: 42098)


Review Of Discovery Ed Science Benchmark. TEACHERS: click here for quick copy question ID numbers.

Most fossils are found in:
a) sedimentary rock
b) loose sediments
c) metamorphic rock
d) igneous rock

Turtles, alligators, and crocodiles are thought to be related to dinosaurs. What is the main source of evidence that scientists use to show this relationship and how these organisms may have changed over time?
a) direct observation
b) hair and skin samples
c) photographs of dinosaurs
d) fossil records

Based on the fossil record, scientists believe there have been several mass extinctions in the history of the Earth. Because of these mass extinctions, which of the following do scientists believe to be true?
a) All species that ever lived still exist today.
b) About 5% of the organisms that ever lived are extinct.
c) About 50% of the organisms that ever lived are extinct.
d) About 98% of the species that ever lived are extinct.

Some harmful bacteria have become able to resist antibiotics because ___.
a) the bacteria adapted to survive the antibiotic.
b) the antibiotic became weaker over time.
c) the environment made the antibiotic not work any more.
d) the number of bacteria is greater than the antibiotic can kill.

The front leg of a cat, front flipper of a dolphin, and wing of a bat have the same structure and order of bones. These structures do not look alike and are not used in the same way, but the bones are similar. What might scientists say about them?
a) They may share a common ancestor.
b) They all live in an aquatic environment.
c) They have completely different ancestors.
d) They all have the ability to fly.

A certain species of rodent eats only one type of plant. A disease attacks those plants and wipes them out. Which of the following best explains what might happen next?
a) The number of this type of rodent will not be affected.
b) The number of this type of rodents will decrease to a point near extinction.
c) The number of this type of rodent will increase and overpopulate.
d) The number of this type of rodent will double in size.

Proteins carry out all the following cell functions except:
a) transporting materials.
b) cell communication.
c) energy storage.
d) speeding up chemical reactions.

What is the relationship between genetics and lifestyle choices in human growth and development?
a) Genetics cannot impact lifestyle choices and lifestyle choices cannot impact genetics.
b) Genetics influences some lifestyle choices, but lifestyle cannot impact genetics.
c) Genetics cannot impact lifestyle choices, but some lifestyle choices influence expression of genes.
d) Genetics influences some lifestyle choices and some lifestyle choices influence expression of genes.

Suppose a particular predator in an area eats rabbits. If hunters kill off all of those predators, the rabbit population will increase, resulting in more ___ among the rabbits for food and space.
a) competition
b) extinction
c) symbiosis
d) cooperation

What are some goals of agricultural engineering?
a) to increase food production
b) to boost nutrient content
c) to extend the average human life span by preventing malnutrition
d) all of the above

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