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Plant Responses

Study Slideshow

A plant stem that grows towards light is an example of a

positive gravitropism

positiv thigmotropism

negative thigmotropism

negative gravitropism

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When chlorophyll in leaves breaks down

the plant becomes very active

yellow and orange pigments become visible

photosynthesis begins

red pigments disappears

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To which three stimuli do plants respond?

touch, gravity and chlorophyll

water light and touch

touch, gravity and light

light, gravity, and soil conditions

15

Irises and lettuce flower when nights are shorter than a critical length. They can be describes as

short-day plants

long day plants

dormant plants

day- neutral plants

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Which of the following is thought to be the ancestor of land plants?

red algae

bacteria

ferns

green algae

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The sac inside a plant cell where water, food and wastes ate stored is the

chloroplast

vacuole

cutie

chlorophyll

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Organisms that produce their own food are called

heterotrophs

autotrops

herbiroves

autosomes

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Two structures found in plant cells but NOT in animal cells are

vacuole and nucleus

cell wall and chloroplasts

chloroplasts and cell membrane

call wall and call membrane

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A group of similar cells that perform a specific function is called

tissue

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The internal transporting system through which water, minerals and food move inside the plant is called

vascular tissue

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A.................. is a structure inside a plants cell in which food is made.

chloroplasts

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The process by which plants make food is called

photosynthesis

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A.............. is a waxy, waterproof layer that covers the leaves and stems of most plats

cuticle

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The sac inside a plant cell where water, wastes and food are stored is called an

vascular

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The green pigment called ............................ is necessary to the food-making process in plants.

chlorophyll

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The cell wall helps a plant retain water

cuticle

oxygen

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