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28 Cards in this Set

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All animal and plant cells have a:

Nucleus, cytoplasm and a cell membrane.

Plant cells also have a:

Cell wall, chloroplasts and a vacuole.

Gestation and infancy are the times of:

Fastest growth

All animals and plants are made of:

Cells

What's the function of the nucleus?

Contains DNA which controls the activities of the cell

What's the function of the cytoplasm?

Contains enzymes and other chemicals – it's the site of most cell processes and reactions

What's the function of the cell membrane?

Regulates the movement of material into and out of the cell

What's the function of the cell wall?

Supports the cell, made of cellulose

What's the function of the chloroplast

Absorbs light energy and uses it to produce sugars in photosynthesis.

What's the function of the large vacuole

Provides support by exerting pressure on the cell contents. Contains a solution of minerals and other nutrients.

Where are chloroplasts mainly found?

In leaf cells

Where does growth occur in a plant?

Mainly at shoot and root tips and in special growth zones like buds

Where does growth occur in animals?

New cells can be made by most tissues

How does growth occur in a plant?

Size increase often caused by increasing the size of cells by absorbing water into the vacuole

How does growth occur in an animal?

Size increase is brought about by increasing the number of cells

Cell specialisation in plants:

Most plant cells can differentiate into different cell types

Cell specialisation in animals:

Only stem cells can differentiate into different cell types. Other animal cell functions remain fixed.

Stem cells are undifferentiated cells found in [?], that have the ability to grow into different tissues

>Animals

Stem cells offer a possible cure for many diseases caused by:

Cell damage

Some people object to research using stem cells that have been taken from:

Embryos

Other sources of stem cells are:

Umbilical cords and bone marrow.

About how many weeks is human gestation?

40 weeks

mammals have different gestation times depending on:

Their size, the number of offspring and how independent they are when born.

Do large animals with a small number of independent offspring have the longest or shortest gestation.

Longest

To check that development is happening at normal rates, infants regularly have:

Their mass and head circumference measured.

What type of cells have a cell wall?

Plant cells

What types of cell have a cell membrane?

All cells

In plants where are the cells that can continue to divide and grow?

Root and stem tips