KC U3R4 “Partnerships in Nature.”

“Partnerships in Nature.”

PARTERNSHIP IN NATURE VIDEO

This passage describes different types of relationships that exist between organisms in nature. A symbiotic relationship is a partnership between organisms. Many symbiotic relationships are mutualistic. In a mutualistic
relationship, organisms help each other survive. A bird cleaning a large animal is an example of a mutualistic relationship. The bird gets a meal and the animal gets cleaned. In a commensal relationship, one partner benefits from the relationship, but the other is neither helped nor harmed. A bird building a nest in
a tree is a commensal relationship. The bird has protection and shelter, and the tree is neither helped nor harmed. In a parasitic relationship, one partner benefits from and hurts the other partner. A flea feeding on the blood of a dog is an example of a parasitic relationship.

Key Words

• commensal: a partnership in which one
partner is helped and one is unharmed
• mutualistic: a partnership that benefits both
partners
• nature: everything in the world not made or
controlled by humans
• parasites: organisms that live on or in other
organisms and harm them while getting food
from them
• protection: defense against harm
• symbiosis: relationships in nature

Academic Words

beneficial = good or useful
 ➡ Having a partner can be beneficial to organisms. They can help each other survive.

interact = talk to other people and work together with them 
➡ The partners interact with one another as they work together.

partnership = a relationship in which two or more people, organizations, etc., work together to achieve something
➡ The green sea anemone and the crab work together. They have a partnership.

role = the position or job that something or someone has in a particular situation or activity
➡ The sea anemone’s role is to protect the crab from predators.

Highlighted Words

organisms, living things
peck, strike or eat by making quick stabbing
motions with its head
ticks, tiny insects that live on other animals
and drink their blood
extracted, took
thorns, sharp needles that grow on some plants
hollow out, remove everything from inside
colonies, communities
insecticide, a chemical

that kills insects
tropical rainforest, forest near the equator
that gets a lot of rain
photosynthesis, process by which plants turn
sunlight into food

dense, thick
nutrients, chemicals in food
predators, organisms that live by eating

other organisms
suction cup, device that sticks to something

by creating a vacuum
burrow, dig

flesh, soft part of a body

Compound and Complex Sentences

A compound sentence is made up of two or more independent clauses.
These are complete sentences that can stand
alone. A complex sentence is made up of one
independent clause (a complete sentence) and
two or more dependent clauses (incomplete

sentences).

COMPOUND AND COMPLEX SENTENES GAMES