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Flashcards in Biology Deck (89)
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1

what is the cell theory?

All living organisms are made of one or more cells. Basic organizational unit of life. All cells come from pre-existing cells.

2

What is the cell membrane?

Separates the inside of the cell from the external environment; controls flow of materials into and out of the cell

3

What is prophase?

is the stage during which the sister chromatids condense and the chromosomes become visable.

4

What is mitosis?

The process of cell division during which the duplicated contents of the cell's nucleus divide into two equal parts

5

How many stages of mitosis are there and what are they?

There are four: Prophase, metaphase, anaphase and telophase

6

What states that all living organisms are made up of one or more cells?

Cell theory

7

What is an unspecialized cell that gives rise to specific specilaized cells in plants?

Meristematic cell

8

What is cytokinesis

Following mitosis, cytokinesis must occur: this is the seperation of the two nuclei and cell contents into two daughter cells. In plant cells, a cell plate forms during cytokinesis that helps form the cell wall. Not a stage of mitosis but is a significant event that signifies the end of mitosis and the start of a new cell cycle.

9

The body system that is responsible for removing liquid waste from the body

Excretory system

10

It is shelf-like; supports the nasal cavity and allows air to be warmed and moistened

Turbinate bones

11

The event that marks the end or mitosis, but is not a stage of mitosis,

Cytokinesis

12

A segment of DNA that controls protein production and traits

Gene

13

High blood pressure

Hypertension

14

The process through which plants produce their own food

photosynthesis

15

The process used by all living things to provide energy from the breakdown of sugar

Cellular respiration

16

Healthy Cells

usually don't reproduce when isolated from their other tissue cells. This is because they communicate cell to cell. They adhere to each other well and communicate to work together. They keep and balance between cell destruction and cell growth

17

what is metaphase?

is the stage of mitosis in which chromosomes are aligned across the center of the cell

18

What is Anaphase?

is the stage of mitosis in which the centromere splits apart and the chromatids are pulled to opposite sides of the cell by spindle fibres

19

What is telophase?

is the stage of mitosis during which two daughter nuclei are formed

20

What are the four reasons cells undergo mitosis?

growth
repair
replacement
reproduction

21

What is cytokinesis

Following mitosis, cytokinesis must occur: this is the seperation of the two nuclei and cell contents into two daughter cells. In plant cells, a cell plate forms during cytokinesis that helps form the cell wall.

22

TRUE OR FALSE
In osmosis, solute particles in areas of higher concentration move to where solute particles are in lower concentration

false

23

TRUE OR FALSE
The centre of a chromosome holding the two chromatids together is called the centriole

false

24

TRUE OR FALSE
Interphase is the stage of the cell cycle that takes the most time

True

25

TRUE OR FALSE
Cancer cells divide more frequently than normal cells.

True

26

TRUE OR FALSE
Xylem is living tissue that transports water and minerals

False

27

TRUE OR FALSE
The palisade layer of the leaf is more active in photosynthesis

True

28

TRUE OR FALSE
Both the frog and the human have two atria in their hearts.

True

29

TRUE OR FALSE
The systematic circuit pumps blood to the lungs while the pulmonary circuit pumps blood to the rest of the body

False

30

What is the chloroplasts?

Traps energy from the sun to make glucose(Plant only)