Ecology

Question 0

What is deforestation?

Answer 0

The clearing of forests.

Question 1

How do we conserve fishing grounds?

Answer 1

• Use environmentally friendly fishing gear instead of gigantic drift nets / cyanide fishing
• Regulating catch size and fishing period
• Laws to protect endangered species
• Raising endangered species in hatcheries and releasing them into fishing grounds where fish populations are decreasing.

Question 2

What is eutrophication?

Answer 2

It is a result of increased dissolved nutrients in closed water bodies as a result of agricultural run-off/untreated sewage

Question 3

What is biodiversity?

Answer 3

It is the number of species in a particular habitat.

It shows the range of types of organisms found there.

Question 4

What is habitat?

Answer 4

Place where organism lives

Question 5

What is community?

Answer 5

All the populations of organisms living and interacting with one another in a particular habitat

Question 6

What is ecosystem?

Answer 6

Made up of a community of living organisms (biotic factors) and its abiotic environment

Question 7

What is biome?

Answer 7

A group of ecosystems of the same type, sharing the same characteristics

Question 8

How are wastes excreted from our bodies?

Answer 8

Carbon dioxide via lungs

Water and salts via skin and kidneys

Question 9

Similarities and Differences btw zooplankton and phytoplankton

Answer 9

1) phytoplankton producer, zooplankton consumer
2) phytoplankton autotrophic, zooplankton heterotrophic
3) Both are microscopic organisms

Question 10

How is energy lost in an organism?

Answer 10

1) heat during respiration
2) Uneaten body parts
3) movement
4) cell reproduction
5) waste products excreted
6) undigested matter egested

Question 11

What are the 6 most commonly known abiotic factors?

Answer 11

1) light intensity
2) temperature
3) water and food availability
4) oxygen content
5) salinity of soil and water
6) pH of soil and water

Question 12

How to explain why concentration of toxin increases as we move along food chain? (~3m)

Answer 12

Bioaccumulation; the toxins are not biodegradable/ not excreted/ removed from the body; Due to inefficiency of transfer of energy, organisms on higher trophic levels feed on large numbers of those in lower trophic levels; Chemicals pass from one trophic level to the next and accumulates;

Question 13

What is population?

Answer 13

A group of organisms of the same species living in the same habitat.