Book 2, Chapter 2, Lessons 2.1-2.3 Flashcards Preview

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Flashcards in Book 2, Chapter 2, Lessons 2.1-2.3 Deck (22):
1

Virus

A tiny, no living particle that enters and then reproduces inside a living cell

2

Host

An organism that a parasite lives with, in, or on, and provides a source of energy or a suitable environment for the parasite to live

3

Parasite

The organism that benefits by living, with, on or in a host in a parasitism interaction

4

Vaccine

A substance used in vaccination that consists of pathogens that have been weakened or killed but can still trigger the body to produce chemicals that destroy the pathogens

5

Bacteria

Single-celled organisms that lack a nucleus;prokaryotes

6

Cytoplasm

The thick fluid region of a cell located inside the cell membrane (in prokaryotes) or between the cell membrane and nucleus (in eukaryotes).

7

Ribosome

A small grain-shaped organelle in the cytoplasm of a cell that produces proteins.

8

Flagellum

A long, whiplike structure that helps a cell to move.

9

Cellular Respiration

The process that releases energy by breaking down glucose and other food molecules in the presence of oxygen.

10

Binary Fission

A form of asexual reproduction in which one cell divides, forming two identical cells.

11

Conjugation

A form of sexual reproduction in which a unicellular organism transfers some of its genetic material to another unicellular organism.

12

Endospore

A structure produced by prokaryotes, such as bacteria, in unfavorable conditions; a thick wall encloses the DNA and some of the cytoplasm.

13

Pasteurization

A process of heating food to a temperature that is high enough to kill most harmful bacteria without changing the taste of the food

14

Decomposer

An organism that gets energy by breaking down wastes and dead organisms, and returns raw materials to the soil and water.

15

Protist

A eukaryotic organism that cannot be classified an an animal, plant, or fungus

16

Protozoan

A unicellular, animal-like protist

17

Pseudopod

A "false foot" or temporary bulge of cytoplasm used for feeding and movement in some protozoans

18

Contractile vacuole

The cell structure that collects extra water from the cytoplasm and then expels it from the cell.

19

Cilia

Tiny, hairlike projections on the outside of cells that move in a wavelike manner

20

Algae

Plantlike protists.

21

Pigment

A colored chemical compound that absorbs light. 2. A colored substance used to color other materials

22

Spore

In bacteria, protists, and fungi, a thick-walled, tiny cell capable of surviving unfavorable conditions and then growing into a new organism.