Definitions from week 3 & 4

Question 1

What is the meaning of Chlorophyll?

Answer 1

a green pigment, present in all green plants and in cyanobacteria, which is responsible for the absorption of light to provide energy for photosynthesis.

Question 2

What is the meaning of Chloroplast?

Answer 2

a plastid in green plant cells which contains chlorophyll and in which photosynthesis takes place.

Plastid: small organelles in the cytoplasm of plant cells

Question 3

What is the meaning of Thylakoid?

Answer 3

flattened sacs inside a chloroplast, bounded by pigmented membranes on which the light reactions of photosynthesis take place, and arranged in stacks or grana.

Question 4

What is the meaning of Light dependent reaction?

Answer 4

the series of biochemical reactions in photosynthesis requiring light energy that is captured by light-absorbing pigments (such as chlorophyll) to be converted into chemical energy

Question 5

What is the meaning of Calvin cycle?

Answer 5

The Calvin cycle is a process that plants and algae use to turn carbon dioxide from the air into sugar

Question 6

What is the meaning of Stroma?

Answer 6

the supportive tissue, consisting of connective tissues and blood vessels.

Question 7

What is the meaning of Environment?

Answer 7

he surroundings or conditions in which a person, animal, or plant lives or operates.

Question 8

What is the meaning of Level of organization?

Answer 8

Levels of organization are structures in nature

Question 9

What is the meaning of Energy?

Answer 9

energy is defined as the ability to do work

Question 10

What is the meaning of Ecosystem?

Answer 10

Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts.

Question 11

What is the meaning of Ecology?

Answer 11

the relations of organisms to one another and to their physical surroundings.

Question 12

What is the meaning of Biological magnification?

Answer 12

the accumulation of a chemical by an organism from water and food exposure that results in a concentration that is greater than would have resulted from water exposure only and thus greater than expected from equilibrium.

Accumulation: gradual gathering of something
Equilibrium: a state in which influences are balanced

Question 13

What is the meaning of Biotic?

Answer 13

relating to or resulting from living organisms.

Question 14

What is the meaning of Abiotic?

Answer 14

physical rather than biological; not derived from living organisms.

Question 15

What is the meaning of Pyramid?

Answer 15

An ecological pyramid is a graphical representation of the relationship between different organisms in an ecosystem.

Question 16

What is the meaning of Food chain?

Answer 16

a series of organisms each dependent on the next as a source of food.

Question 17

What is the meaning Food web?

Answer 17

interdependent food chains.

Question 18

What is the meaning of Relationships in the ecosystem?

Answer 18

The interaction between organisms in similar

Question 19

what is the meaning of Photosynthesis?

Answer 19

the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.

Question 20

what is the meaning of Competition?

Answer 20

the activity or condition of striving to gain or win something by defeating or establishing superiority over others.

Question 21

what is the meaning of Symbiosis?

Answer 21

interaction between two different organisms living in close physical association, typically to the advantage of both.

Question 22

what is the meaning of Predator?

Answer 22

an animal that naturally preys on others

Question 23

what is the meaning of Prey?

Answer 23

an animal that is hunted and killed by another for food.

Question 24

what is the meaning of Carrying capacity?

Answer 24

a species’ average population size in a particular habitat.

Question 25

what is the meaning of Density - dependent factors?

Answer 25

Density-dependent factors include disease, competition, and predation. Density-dependant factors can have either a positive or a negative correlation to population size. With a positive relationship, these limiting factors increase with the size of the population and limit growth as population size increases.

Question 26

what is the meaning of Density - independent factors?

Answer 26

Density-independent factor, also called limiting factor, in ecology, any force that affects the size of a population of living things regardless of the density of the population

Question 27

what is the meaning of Limiting factor?

Answer 27

A limiting factor is anything that constrains a population’s size and slows or stops it from growing.

Question 28

what is the meaning of Exponential growth model?

Answer 28

An exponential growth model describes what happens when you keep multiplying by the same number over and over again

Question 29

what is the meaning of Logistic growth model?

Answer 29

Logistic growth is population increase that happens in a manner that starts slowly, as there are few individuals, then increases in speed as numbers increase, but then decreases to a halt as numbers get high enough that resources are depleted and cannot support further growth