Life Science Terms
Food Chains & Food Webs
Ecosystem Fun
Cells
MRS GREN
100

A living or once living part of the environment.

Biotic

100

What term describes the importance of having many different species within an ecosystem?

Biodiversity 

100

Organisms that go through photosynthesis are called...

Producers 

100

What is it called when two species must fight over the same resources?

Competition 

100

What does the N specifically stand for in MRS GREN? Only the exact response will be accepted.

Nutrition

200

Nonliving parts of an environment.

Abiotic

200

What term describes the maximum population size of a species that a population can sustain over time?

Carrying Capacity 

200

What type of organism is a vulture (specifically)? 

Scavenger 

200

Organisms have specialized structures to help them survive and...

Reproduce 

200

What do the two R's stand for in MRS GREN.

Reproduction and Respiration

300

All the living and nonliving things that interact with each other in an environment.

Ecosystem 

300

What is the one resource that can impact carrying capacity that is not listed here. 

Food, Water, Shelter

Space 

300

When an organism dies, we rely on what type of organisms to break it down? 

Decomposers 

300

What term states that all living things are made up of at least one cell?

Cell Theory 

300

A baby turning into an adult over the course of many years represents what part of MRS GREN?

Growth 

400

The study of how living and nonliving things interact.

Ecology

400

What is the name of a species that help to hold an ecosystem together? 

Keystone Specieis

400

Species that eat species that go through photosynthesis are called? 

Primary Consumers / Consumers 

400

What cell do animals and plants both have, but it is way bigger in plants? 

Vacuoles

400

Sweating represents what part of MRS GREN?

Excretion 

500

A place where an organism makes its home. It meets all the environmental conditions an organism needs to survive.

Habitat

500
What direction do arrows point in a food web/food chain? 

The direction of energy flow

500

How many atoms are in the reactants of photosynthesis?

36

500

Genetics impact growth, but changes in the ______ can also impact how much an individual grows. 

Environment 

500
Quickly moving away from a hot fire represents what part of MRS GREN?
Sensitivity 
M
e
n
u