Life Systems/Ecosystems JLab

The various organized structures present in the cytoplasm are called organelles. Which of the following organelles is responsible for the release of energy to support cell activities?

• vacuole

• mitochondrion

• nuclelus

• endoplasmic reticulum

Animals and plants get their food in different ways. Animals usually ingest their food, while plants must produce their own food. The process through which plants produce their food is called

• respiration

• pollination

• photosynthesis

• germination

Many ideas concerning cells have been proven and incorporated into the cell theory. Which of the following is not part of the cell theory?

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

• All cells reproduce through meiosis.

• All functions may be carried out by cells.

• All cells come from other cells.

Which of the following traits of a corn plant is least influenced by the environment?

• Root structure

• Number of ears produced

• Height

• Color of kernels

Most of the water in the air comes from

• transpiration

• evaporation

• precipitation

• condensation

Which of these best describes the niche of a lion?

• parasite

• producer

• prey

• predator

Which biome is most suitable for raising crops such as corn, wheat, and oats?

• A desert

• A grassland

• A tropical rain forest

• A taiga

In this plant cell, which cellular structure is responsible for storing food, water, and wastes?

• Vacuole

• Nucleus

• Cytoplasm

• Cell Membrane

When animals hibernate, their heart rate and respiration decrease and they lose consciousness. Why do some animals hibernate?

• To increase their body fat during cold periods

• To give their fur time to grow longer and thicker

• To rest after a summer of high activity

• To conserve energy usage during the winter

Asexual reproduction involves only one parent. The offspring of this type of reproduction have -

• One-half of the DNA of the parent

• DNA that is different from the parent

• DNA identical to the DNA of the parent

• DNA that is incomplete