Food Chains
What is an organism that makes its own glucose called?
Where do all food chains get their energy from at the beginning?
The sun
What process uses light energy to make glucose?
Photosynthesis
What process converts glucose into usable energy in the form of ATP?
Cellular Respiration
What is ecological succession?
The process by which one species/community replaces another over time in an ecosystem.
In a food chain, what is the difference between a predator and its prey?
A predator does the hunting and the prey is the one being hunted.
What is the correct sequence for the flow of energy in a typical ecosystem?
A. Heterotrophs → Autotrophs → Sun
B. Sun → Autotrophs → Heterotrophs
C. Autotrophs → Sun → Heterotrophs
D. Heterotrophs → Sun → Autotrophs
B. Sun → Autotrophs → Heterotrophs
What organisms go through photosynethesis?
Plants & Algae
What organisms go through cellular respiration?
EVERYTHING
What is the major difference between primary and secondary succession?
Primary succession begins on bare rock with no soil, while secondary succession begins in an area where soil remains after a disturbance.
In this food chain, identify the producer, primary and secondary consumer.
Grass Rabbit Fox
Rabbit= Primary Consumer
Fox= Secondary Consumer
In an energy pyramid, why does each level only keep 10% of the energy?
Most of the energy gets lost as heat.
In the photosynthesis equation, which are the reactants?
Carbon Dioxide, Water & Light
In the cellular respiration equation, which are the products?
Water, Carbon Dioxide & 38 ATP
A glacier retreats and exposes a large area of bare rock. Would this area experience primary or secondary succession? Why?
Primary succession, because the area begins with bare rock and no soil.
A new species of a large predatory bird enters an ecosystem. The bird only eats mice. What would most likely happen to the snake population if snakes also eat mice?
The predatory bird and the snakes would have to compete for the mice.
A producer contains 10,000 J of energy. Using the 10% rule, approximately how much energy would be available to the primary consumers?
1,000 J
Complete the equation
6CO₂ + 6H₂O + light energy → ______ + ______
C₆H₁₂O₆ + 6O₂
Complete the equation.
C₆H₁₂O₆ + 6O₂ → ______ + ______ + ______
6CO₂ + 6H₂O + 38 ATP
What are pioneer species and in what type of succession are they seen? Give an example.
Pioneer species are organisms that are able to live on and help break down bare rock. Examples are lichens and mosses
An ecosystem contains:
Grass → Mouse → Snake → Hawk
If the mouse population suddenly decreases, which organisms would be affected and why?
Grass would increase and the snake population would decrease.
What order do the types of energy go in?
A. Glucose → ATP → Light
B. Light → ATP → Glucose
C. Light → Glucose → ATP
D. ATP → Light → Glucose
C. Light → Glucose → ATP
A plant has plenty of water and carbon dioxide but receives very little light. Based on the photosynthesis equation, what would happen to its ability to produce glucose?
The ability to produce glucose would decrease but light energy is required.
Photosynthesis:
6CO₂ + 6H₂O + light → C₆H₁₂O₆ + 6O₂
Cellular respiration:
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + ATP
How are the products of one process related to the reactants of the other?
The products of photosynthesis are the reactants in cellular respiration and vice versa.
Why do mosses or bushes eventually get replaced by big trees and what type of community does this lead towards?
Mosses and bushes lose the fight for light and this leads to a climax community.