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Flashcards in Key Terms Deck (298)
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1

What is the abdomen?

-The lower region of the body.
-Contains the digestive organs.

2

Define accurate.

Close to the true value.

3

What is acid rain?

-Rain that is acidic due to dissolved gases.
-Produced by burning fossil fuels.

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4

What is an active site?

The site on an enzyme where the reactants bind.

5

What is active transport?

The movement of substances against a concentration gradient using energy.

6

What is adaptation?

A feature that makes an organism well suited to the environment where it lives.

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7

What is adult cell cloning?

-Process in which the nucleus of an adult cell of one animal is fused with an empty egg from another animal.
-The embryo is placed inside the uterus of a third animal to develop.

8

What is aerobic respiration?

Breaking down food using oxygen to release energy.

9

What is agar?

The nutrient jelly on which many microorganisms are cultured.

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10

What are algal cells?

The cells of algae, single-celled
or simple multicellular organisms, which can photosynthesise but are not plants.

11

What is an allele?

A version of a particular gene.

12

What are alveoli?

Tiny air sacs in the lungs which increase the surface area for gaseous exchange.

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13

What are amino acids?

The building blocks of protein.

14

What is amylase?

The enzyme made in the
salivary glands and the pancreas which speeds up the breakdown of starch into simple
sugar.

15

What is anaerobic respiration?

Breaking down food without
oxygen to release energy for the cell.

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16

What is an anomalous result?

Result that does not match the pattern seen in the other data collected or is well outside the range of other repeat readings.
It should be retested and if necessary discarded.

17

What is an antibiotic?

A drug that destroys bacteria inside the body without damaging human cells.

18

What is an antigen?

-The unique protein on the surface of the cell.
-It is recognised by the immune system as self or non-self.

19

What is the aorta?

The main artery leaving the left ventricle carrying oxygenated blood to the body.

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20

What is an artery?

-A blood vessel which carries blood away from the heart.
-It usually carries oxygenated blood and has a pulse.

21

What is asexual budding?

-A form of asexual reproduction where a complete new individual forms as a bud on the parent organism.

22

Give two organisms that undergo asexual budding.

-Yeast
-Hydra

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23

What is asexual reproduction?

-Reproduction that involves only one individual with no fusing of gametes to produce the offspring.
-The offspring are identical to the parent.

24

What are the atria?

-The small upper chambers of the heart.
-The right atrium receives blood from the body and the left atrium receives blood from the lungs.

25

What is auxin?

A plant hormone that controls the responses of plants to light and gravity.

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26

What is bacteria?

-Single celled microorganisms that can reproduce very rapidly.
-Many bacteria are useful but some cause disease.

27

What is a bacterial colony?

Population of billions of bacteria grown in culture.

28

What is a biconcave disc?

-The shape of red blood cells.
-A disc which is dimpled inwards on both sides.

29

What is bile?

-Yellowy green liquid made in the liver and stored in the gallbladder.
-It is released into the small intestine and emulsifies fats.

30

What is biodiversity?

-The number and variety of different organisms found in a specific area.

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