Food Webs and Dinosaurs Flashcards
When did they first appear in the fossil record?
250-300 mya
What does the term dinosaur mean and refer to?
Terrible Lizard, and refers to a small group of organisms.
What are dinosaurs who only eat plants called?
Herbivores
What are dinosaurs who only eat meat called?
Carnivores
What are dinosaurs who eat both meat and plants called?
Omnivores
What is a food chain?
A sequence of who eats who in a biological community to obtain nutrition
What does the food chain start with?
Normally the sun
What is the primary producer in a food chain?
A plant that uses photosynthesis as nutrition.
What are the organisms that eat the primary producers called?
Primary consumers
What are the animals that eat the primary consumers called?
Secondary consumers
These animals are then eaten by even larger consumers, called what?
Tertiary consumers
What are tertiary consumers eaten by?
Quaternary consumers, or the top predator.
Which section of the food chain has no enemies?
The top predator.
In the dinosaur world what would have been the top predator?
T-Rex
What do the arrows in a food chain show?
The flow of energy
How much energy is lost at each step and why?
90%, and because of having to carry out the seven life processes.
What is the trophic level of an organism?
The position it holds in a food chain
What is a network of many food chains called
A food web
The number of organisms at each trophic level tends to decrease, why?
Because there is not enough energy to support large number of these higher consumers.
What could be the primary producer in a pyramid of numbers that isn’t shaped like a pyramid?
Oak trees
