2.5: Investigating ecosystems (2024)

Name the tool for identification of unfamiliar organisms. 

A limitation of the dichotomous key is that it tends to examine physical characteristics rather than behaviour. True or False .

• Ture

• False

Ecosystems can be broadly divided into three types – marine, freshwater, and Name the third one

Estuaries are classified as marine ecosystems. True or False .

• Ture

• False

Measurements should be repeated to increase reliability of data.  True or False .

• Ture

• False

Salinity can be measured using electrical conductivity or by the density of the water. True or False .

• Ture

• False

The Lincoln Index in a direct way of estimating the abundance of an animal population. True or False

• Ture

• False

The Lincoln Index in a direct way of estimating the abundance of an animal population. True or False . if it's false give reason

Species richness is the number of species in a community whereas species diversity is the number of species and their relative abundance in each area or sample. True or False .

• Ture

• False

Methods for estimating the biomass and energy of trophic levels in a community include measurement of dry mass, controlled combustion, and extrapolation from samples. True or False .

• Ture

• False