Chapter-1-Section-3-Notes-Filled

Name: _____________________________________________ Date: ___________ Hour: __________ Chapter 1, Section 3 Notes 1. What is a limiting factor?

2. The largest population that an environment can support at

A limiting factor is a resource

any given time is called the carrying capacity.

that is so scarce it limits the size of a population. 3. Describe the four main ways that organisms affect one another: 1) Competition: 2) Predators and Prey: Competition occurs when two or Predators eat the prey. more individuals or populations try to use the same resource (food, water, shelter, space, or sunlight). 3) Symbiosis: Symbiosis is a close, long-term

4) Coevolution: Coevolution occurs when a long-term

association between two or more species.

change takes place in two species because of their close interactions with one another.

4. How can competition occur? (2 situations) a) Between individuals

5. How is the use of resources related to competition? If resources are in limited supply,

within a population

an individual or population using it can decrease the amount available

b) Between populations

to other organisms.

6. How do adaptations help predators?

7. How do adaptations help prey?

Adaptations help predators to catch their prey.

Adaptations help prey to escape/avoid being eaten.

8. Describe and list an example for each of the following predator-prey adaptations. a) camouflage b) defensive chemicals Blending in with the background Chemicals used to defend a prey from a predator Example: Walking stick insect

Example: Bees put powerful acid into attackers.

9. Describe the three main types of symbiotic relationships. a) Mutualism:( + / + ) b) Commensalism:( + / 0 ) Both organisms benefit.

c) warning coloration Coloration that warns predators Example: Yellow jacket

c) Parasitism:( + / - )

One organism benefits

One organism benefits

one organism is not affected.

One organism is harmed

10. Circle the type of symbiotic relationship the following examples represent. a. A bee pollinating a flower mutualism / commensalism / parasitism b. Human head lice

mutualism / commensalism / parasitism

c. Cattle egrets and livestock

mutualism / commensalism / parasitism

Mr. Lee’s Symbiosis Rap 1. What example of mutualism does Mr. Lee give in his rap? A hippo with a birdie on its back.

2. What does the bird gets from the hippo? 3. What does the hippo get from the bird? A free ride and food

The bird eats the parasites, so he is free from parasites.

4. What three types of symbiosis does Mr. Lee discuss? mutualism, commensalism, parasitism

5. What example of commensalism does Mr. Lee give in his rap? A snake and a tree

6. What happens to the tree because

7. What does the snake get from the tree?

the snake is there? Nothing

The snake is able to camouflage itself with the tree for safety.

8. What example of parasitism does Mr. Lee give in his rap? Leeches, fleas, and ticks

9. What happens in a parasitic relationship? A parasite hurts (but usually does not kill) its host by living off of it.