Chapter 1/2-living organisms

Question 1

what is movement

Answer 1

an action by an organism or part of an organism that causes a change in position or place.

Question 2

what is respiration

Answer 2

the chemical reactions that break down nutrient molecules in living cells to release energy for metabolism.

Question 3

what is sensitivity

Answer 3

the ability to detect or sense stimuli within the internal or external environment, and make appropriate responses.

Question 4

what is growth

Answer 4

a permanent increase in size and dry mass by an increase in cell number.

Question 5

reproduction

Answer 5

the process that makes more of the same organism. there is Sexual and asexual reproduction .

Question 6

excretion

Answer 6

the removal from organisms of toxic materials such as waste products from metabolism, and substances that are in excess.

Question 7

nutrition

Answer 7

the taking in of materials for energy, growth and development.

Question 8

species

Answer 8

organisms that are classified into different groups and are able to reproduce and make fertile offsprings.

Question 9

3 ways to show relatedness of organisms:

Answer 9

-morphology(visible feature)
-DNA base sequences
-study of structures within cells
-whether organisms can breed together to produce fertile offsprings.

Question 10

features of mammals

Answer 10

-warm blooded
-fur on skin
-four limbs
-visible ears

Question 11

features of reptiles

Answer 11

-scaly skin
-lay eggs with rubbery shells on land
-cold blooded

Question 12

features of birds

Answer 12

-have wings
-warm blooded
-lay eggs with hard shells on land
-feathers
-beak

Question 13

amphibians

Answer 13

-smooth,moist skin
-cold blooded
-lay eggs in water without shells
-

Question 14

fish

Answer 14

-cold blooded
-breathe through gills
-lay eggs without shells

Question 15

what is a root hair cell?

Answer 15

it absorbs mineral ions and water form the soil.

Question 16

xylem vessel

Answer 16

supports and conducts water through the plant.

Question 17

what is lignin?

Answer 17

it is in most plants cells to help them stay rigid

Question 18

palisade mesophyll cell

Answer 18

photosynthesis

Question 19

nucleus

Answer 19

contains the DNA ,which controls the cells activities

Question 20

cytoplasm.

Answer 20

a gel like substance, made of water and dissolved solutes,which supports the internal cell structures.

Question 21

ribosomes

Answer 21

site of protein synthesis

Question 22

chloroplast

Answer 22

contains green pigments of chlorophyll, to absorb light energy.
-conatins enzymes needed for photosynthesis,