- Which of the following organisms could be the primary source of energy for a food chain?
Your answer:
earthworm
ladybug
green algae
squirrel
- Which catagory best describes an animal that eats only plants?
Your answer:
herbivore
consumer
carnivore
producer
- Which of the following defines an omnivore?
Your answer:
A herbivore that eats only plants
A special kind of carnivore
A producer that eats meat
A consumer of plants and animals
- Which of the following describes what a food chain shows?
Your answer:
Which foods in a community grow the best
How energy travels in a community
How plants are linked to the Sun
How animals move about tin their community
- Suppose all the decomposers disappeared from a forest ecosystem. Which of the following would most likely result?
Your answer:
The forest floor would grow lush with new bushes and ferns.
The forest floor would be covered with dead plants and animals
The trees would grow straighter and taller
The trees and bushes would suddenly stop growing
- What occurs when decomposers feed on dead organisms?
Your answer:
The organisms begin to grow again
The decomposers give off oxygen
The decomposers become poisonous
The organisms break down into soil
- Which of the following makes up an ecosystem
Your answer:
The living and nonliving things in a particular place
All the nonliving things found on Earth
All the living things on Earth
The living things found in a particular place
- A cactus is planted in a temperate rainforest in northern California. Which of the following describes what will most likely happen in the rainforest ecosystem?
Your answer:
There will be little change because the cactus will probably not survive
The cactus will reproduce much more rapidly than normal and replace rainforest plants
The cactus will grow far taller than normal size to reach sunlight
The cactus will grow will and spread below the rainforest trees
- Which of these best determines how many of a particular species of carnivore can survive in one ecosystem?
Your answer:
The abundance of nonliving things for food and shelter that are available to that species
The number of predators of the species and the number of prey available to the species
The number of herbivores competing for food with the species
The total number of carnivores, including the species, living in the ecosystem
- If an environment suddenly changes from cool and wet to hot and dry, which of these will be threatened first?
Your answer:
Herbivores
Soil, rocks, and landforms
Producers
Predators
- Which of the following describes how a living organism can help in the pollination of one type of flowering plant?
Your answer:
Wind carries pollen from stamens of the plants to their pistols
Burrowing mammals dig up the plants and leave them to root in a new place
Bees fly from one flower to another flower of the same type, moving pollen from stamens to
Insect crawl from the stamens of the plant bringing pollen to pistils of another type of plant.
- Which statement about microorganisms is most correct?
Your answer:
Many do not cause diseases and are also helpful
Most, such as bacteria and viruses, cause diseases
Although they are not beneficial, most cause no harm
They are never helpful
- A main difference between helpful and harmful bacteria is that harmful bacteria
Your answer:
Damage or kill living body cells
Feed on oil and break up sewage
Cause some plants to make nitrogen
Live off already dead tissue
- A new species of plant, plant P , is brought to a field and planted. It grows faster and stronger than plant N, a similar native plant growing in the filed. The new plant P produces many more seeds than plant N. Which of these is the most likely outcome for plant N?
Your answer:
Will begin to grow faster and stronger
Will grow well under plant P
Will start to produce more seeds
Will begin to disappear
- Which of the following is a characteristic of most bacteria
Your answer:
Most bacteria cause diseases
Most bacteria harm plants
Most bacteria are decomposers
Most bacteria live on animals