Science 7 End of Course Assessment

The structure of DNA can best be described as a __________.

• single helix

• duo helix

• double helix

• triple helix

A student is testing how different amounts of heat affect lizard movement. What error has the student made while conducting the experiment? The first cage has one lizard, second one has two lizards, and the third one has 3 lizards.

• The experiment is missing a dependent variable .

• The experiment is missing an independent variable.

• The experiment has more than one control.

• The experiment has more than

  one independent variable.

The three components of The Cell Theory are the following (MARK ALL 3 ANSWERS):

• All living things are composed of one or more cells.

• All cells come from existing cells.

• A cell is the basic structural and functional unit of living organisms

• All cells contain a nucleus and cell membrane

All human beings have different fingerprints even though they are the same species. What type of influence causes this diversity among the same species?

• Mutations with DNA

• Environmental changes

• Natural Selection

• Genetic Variation

If a plant survives in the tundra it must possess an adaptation of tolerance to

• severe thunderstorm activity

• increased amounts of minerals in the soil

• more precipitation than normal

• really low temperatures

Over the past few weeks, Briana has been conducting an experiment to see what type of bread grows the most mold within a given period of time. She's chosen 6 different types of bread, and as time passed, she's measured the areas of each mold patch that's grown on the respective bread slices. What is her independent variable?

• Time (weeks passed)

• Bread Type

• Amount of Mold Growth

• Area of bread slices

Harmful algal blooms, dead zones, and fish kills are the results of a process called eutrophication — which occurs when the environment becomes enriched with nutrients, increasing the amount of plant and algae growth to water. What is one cause of Eutrophication?

• Decreased amounts of nitrogen used by plants.

• Industrial wastes being dumped in the water

• Lowered amounts of pollution from the atmosphere.

• Extreme heat that causes drought.

Which example below correctly lists a food chain from producer to third order consumer?

• grass, mouse, raccoon, wolf

• owl, salamander, grasshopper, shrub

• fern, snake, squirrel, eagle

• plankton, seal, polar bear, fish

Which of these correctly identifies the cell organelle with its function in the cell?

• Mitochondria: Releases energy from the breakdown of nutrients

• Chloroplast: Carries proteins to different areas of the cell

• Endoplasmic Reticulum: Controls protein production in the cell

• Cell Wall: Allows materials to enter and leave the cell

What is an example of cooperation within a species?

• A Cape May Warbler feeds at the top of a pine tree while the Yellow-Rumbed Warbler feeds at the bottom.

• A coyote stalks and attacks a rabbit to ensure that its nutritional needs are met.

• A chipmunk collects all of the acorns in an area of the forest without leaving any for a squirrel to gather.

• A chimpanzee raises the young of the deceased chimpanzee instead of reproducing.