Life Processes and MRS GREN

30 Question-and-Answer flashcards summarizing key points on the seven life processes (MRS GREN), movement in animals and plants, respiration, sensitivity, growth, reproduction, excretion, nutrition, photosynthesis, and dietary categories.

Which acronym helps remember the seven life processes common to all living things?

MRS GREN

What are the seven life processes represented by MRS GREN?

Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition

According to MRS GREN, when is something considered non-living?

When it cannot perform all seven life processes

Why do animals move?

To find food, water, and shelter, escape predators, and reproduce

Do plants move?

Yes; they move slowly compared with animals

Toward what do plant shoots generally move and why?

Toward sunlight to maximize photosynthesis

Toward what do plant roots move?

Toward water and the pull of gravity

What is respiration?

The process that releases energy from food inside cells

Write the word equation for aerobic respiration in humans.

Glucose + Oxygen → Energy + Carbon dioxide + Water

Which gas is required for respiration?

Oxygen

Name the two waste products of respiration.

Carbon dioxide and water

What chemical test confirms the presence of carbon dioxide gas?

It turns limewater milky

Does respiration mean breathing?

No; respiration is a chemical process in cells, not simply breathing

What is sensitivity?

The ability to detect and respond to changes in surroundings

What are the five human senses?

Sight, hearing, touch, taste, and smell

Give two animals that can hear ultrasound.

Dogs and bats

How does growth differ between animals and plants?

Animals stop growing at adulthood; plants grow throughout life

Why is reproduction essential for a species?

Without it, the species would disappear once existing individuals die

Give one example of an animal that lays eggs and one that gives live birth.

Birds lay eggs; mammals (e.g., humans) give live birth

What do mammal mothers provide to their offspring after birth?

Milk (they suckle their young)

How can pollen be transferred between flowers in plants?

By wind, insects, or birds

What is excretion?

Removal of waste products that could harm the organism

How is carbon dioxide removed from the human body?

It is exhaled in the breath

What could happen if carbon dioxide were not removed from the body?

It would poison the body and eventually kill the organism

What is nutrition?

Obtaining food to keep an organism healthy

Animals that eat only plants are called what?

Herbivores

What do we call animals that eat only other animals?

Carnivores

What are animals called if they eat both plants and animals?

Omnivores

What process allows green plants to make their own food?

Photosynthesis

Which gas is taken in by green plants for photosynthesis?

Carbon dioxide