Hills. Cty Semester 2 Review

A student set up an experiment to test the effect of different liquids on plant growth. He placed identical plants into individual test tubes containing sugar water, salt water, tap water, bottled water, and pond water. He took measurements of the plants’ height every day for three weeks and recorded the measurements.

What is the independent (testing) variable?

• the height of the plant

• the type of plant

• the temperature of the plant

• the amount of sunlight

Answer explanation

Photosynthesis is a process in which plants make food in the form of sugar. In this process, light energy is converted to chemical energy that is stored in the bonds of the sugar molecules.

What could a scientist do to verify that photosynthesis requires light energy?

• observe plants growing in a forest

• study fossils of extinct plants and compare them to modern plants

• observe differences in plants placed in darkness w/ plants in light

• observe the effecs of different kinds of fertilizers on different groups of plants

Look at the model and answer the following question.

Which part of the illustration depicts how photosynthesis supports cellular respiration in animals?

• the release of oxygen from the leaves

• the absorbtion of sunlight by the leaves

• the taking in of carbon dioxide by the leaves

• the release of water by the leaves

Ticks will feed on a deer’s blood and harm the deer. This is an example of....

• parasitism

• commensalism

• mutualism

A roan (RW) bull mated with a red (RR) cow. What is the probability or producing a white (WW) cow?

• 25%

• 50%

• 100%

• 0%

What is the name of the diagram that shows the energy available to each trophic level in an ecosystem?

• succession 

• cellular respiration

• energy pyramid

• biochemical cycle

A group of the same type of organisms living in the same place at the same time.

• threatened species
• populations
• community
• limiting factor

A cuckoo may lay its eggs in a warbler’s nest. The cuckoo’s young will knock the warbler’s eggs out of a nest and the warbler will raise the cuckoo’s young. What is this an example of?

• parasitism

• commensalism

• mutualism

The general name for a small structure within a cell that performs a specific job.

• Cell

• Organelle

• Nucleus

• Cytoplasm

What type of symbiosis?  Hummingbirds feed on nectar from flowers.  The flowers are pollinated by hummingbirds as they move from flower to flower.

• commensalism
• mutualism
• parasitism
• predation