TCI Unit 1 Lesson 2 - Plant Structures for Protection

In order to survive, plants that live in _____ places have structures to slow the loss of water.

• wet

• dry

• windy

• high

Spines, thorns, and prickles are all structures that

• help plants kill insects for food.

• provide protection against animals.

• poison animals that try to eat them.

• prevent plants from taking in too much water.

What is the name of the tough outer covering of the stems of trees and many bushes?

• bark

• seed

• leaf

• branch

Caterpillars avoid ______ leaves because they are hard to eat

• thick

• small

• green

• slippery

Many conifers produce resin, which is a

• stiff, thin leaf that is very sharp.

• light-weight seed that animals spread.

• bad-tasting fruit that animals avoid.

• sticky substance that traps insects biting into the plant.

Olivia observes a pine tree. The picture shows what she observes. What does Olivia observe, and what is its function?

• Some pine trees have thin outer bark to prevent water loss.

• Some pine trees produce sticky resin to protect themselves from insects.

• Some pine trees have stems covered by prickles to protect themselves from animals.

• Some pine trees produce poisonous substances in their roots to protect themselves from other plants.

Match the following

In order to protect against _______, plants may use _______

• bark

• water loss

• prickles

• fires

• resin

• animals

• hairy leaves

• insects biting into it

The plant shown in the picture is called Lamb's Ear. The leaves are covered in a thick layer of hair similar to cotton balls. Based on the evidence in the photograph, how do the leaves on Lamb's Ear protect the plant?

• The leaves are prickly, so they help keep animals from eating it.

• The leaves are fuzzy, so they help keep animals from chewing it.

• The leaves store water, so they help protect the plant in dry places.

• The leaves have waxy surfaces, so they help protect the plant in windy places.

Sam is investigating four kinds of plants. He records some information about the plants in a chart. Sam claims that one of the plants he investigated has structures that help protect the plant from being killed by fire. Which of the following statements is evidence to support Sam's claim?

• Holly bushes have leaves with a waxy surface.

• Apple trees have stems that are covered in bark.

• Raspberry bushes have leaves with a rough surface.

• African violets have stems and leaves that are covered in hairs.