3.1 Species, Communities And Ecosystems

Question 1

organism reproduces sexually only with another of the same type, and hybrids between different types of species are rare.

Answer 1

Species

Question 2

When two members of the same species mate and produce offspring.

Answer 2

Interbreeding

Question 3

Occasionally members of different species breed together

Answer 3

Cross-breeding

Question 4

is a group of organisms of the same species that inhabit the same area at the same time.

Answer 4

Population

Question 5

which means self-feeding. They make their own carbon compounds from carbon dioxide and other simple substances.

Answer 5

Autotrophic

Question 6

which means feeding on others. They obtain their carbon compounds from other organisms.

Answer 6

Heterotrophic

Question 7

feed off other organisms. These other organisms are either still alive or have only been dead for a relatively short time. They ingest their food, digest and absorb the products of digestion.

Answer 7

Consumers(heterotrophs)

Question 8

Are heterotrophs that obtain organic nutrients from detritus by internal digestion

Answer 8

Detritivores

Question 9

secrete digestive enzymes into the dead organic matter and digest it externally. They then absorb the products of digestion. Ex. Bacteria and fungi

Answer 9

Saprotrophs (decomposers)

Question 10

Are formed by populations of diferent species living together and interacting with each other.

Answer 10

Community

Question 11

Is a community of organisms in an area and their interactions with their non-living environment, called also the abiotic environment.

Answer 11

Ecosystem

Question 12

Which chemical elements are needed to make carbohydrates, lipids, and other carbon compounds?

Answer 12

Carbon, hydrogen, nitrogen, phosphorus and oxygen

Question 13

There are three requirements for sustainability in ecosystems:

Answer 13

Nutrient availability
Detoxification of waste products
Energy availability