Unit Test: Ecology (4.2 and 4.6) Flashcards Preview

Pb Science > Unit Test: Ecology (4.2 and 4.6) > Flashcards

Flashcards in Unit Test: Ecology (4.2 and 4.6) Deck (15):
1

Using a specific example (perhaps the species you presented on) explain the negative impact of introducing a non-native species into an environment. 4

After Zebra mussels were introduced, it gave a negative impact to its new environment.

They harmed the environment, the economy or even, human health.

It doesn't have any natural predators so they are growing out of control, pushing and endangering native species

Today they cost governments billions and billions of tax payer's money

2

Why are introduced species so often detrimental to their new environment? 2

Introduced species can be so detrimental to their new environment because they can push native species on the brink of extinction. And taking out native species can cause unequalness.

An example of that would be: Animals that were once prey can now be in abundance which can destroy the environment where the prey can eat all what they want.

3

Describe the difference between consumers and producers 2

Producers synthesize food for the entire ecosystem through the process of photosynthesis. Plants with the help of carbon dioxide and sunlight, synthesize food. This process is called photosynthesis.

Consumers: They cannot synthesize food on their own, so they depend on producers for their food.

4

What are consumers? 3

They cannot produce their own food

Get their energy from what it eats

Fall into 1 or 3 levels: Primary, Secondary or Tertiary

5

What are Primary consumers? 2

Consumers that eat plants

Ex: Herbivores

6

What are Secondary consumers? 2

Consumers that eat small animals

Ex: Small carnivores

7

What are Tertiary consumers? 2

Consumers that eat larger animal's, "top" of the food chain

Ex. Large carnivores

8

What are the 5 "kinds" of Consumers/Heterotrophs?

Herbivore

Carnivore

Omnivore

Decomposer

Detrivore/Saprotroph

9

What is a Herbivore?

An organism that eats only plants

Ex. Caterpillars

10

What is a Carnivore?

An organism that eats only animals

Ex. Sharks, Lion, Wolf

11

What is a Omnivore?

An organism that eats both plants and animals

Ex. Human beings, Crabs, Hummingbirds, Crows, Badgers, Rats, Ring-tailed lemur, Crickets, Wasps

12

What is a Decomposer?

An organism that consumes any remaining dead plant and animal matter

Ex. Fungi (Mushrooms), Bacteria, Earthworms, Clams, Lobsters, Flat worms

13

What is a Detrivore/Saprotroph?

An organism that eats the bodies of smaller dead animals, dead plant matter and animal dung

Ex. Millipedes, Woodlice, Dung flies, Slugs, Many terrestrial worms, Sea stars, Sea cucumbers, Fiddler crabs

14

Describe why food chains/webs have finite numbers of levels

Food chains/webs have finite numbers of levels because when an organism (higher in the food chain) eats another organism (lower in the food chain) the amount of energy transferred to the next trophic level is between 5-20%.

Most stored energy is lost. Mostly from waste and some from heat.

15

Who are producers?

Producers synthesize food for the entire ecosystem through the process of photosynthesis. Plants with the help of carbon dioxide and sunlight, synthesize food. This process is called photosynthesis.