Question

In a community, the dominant species is.....

1) the species that crates many niches.

2) the species with the highest total biomass in the community.

3) the most efficient competitor.

4) the most reproductively successful species.

The proportion of chemical energy in assimilated food that is converted to a consumer's own new biomass is known as which of the following?

1) respiration

2) primary production

3) standing crop

4) production ethnicity

Species richness increase.....

1) in communities experiencing frequent disturbance events.

2) on small islands as the distance from the mainland decreases.

3) as we travel northward from the North Pole to the equator.

Answer 1

1) In an ecological community the dominant species is the one which occupy a great biomass. So it is quite simple to answer this question.  

In a community,a dominant species is,the species with the highest total biomass in the community. So the correct option is option -2 .

2) Primary production is usually occurs in plants . The plants are capable to synthesise their own food material by using inorganic chemicals ,chlo chlorop,water in presence of sunlight.This process is also known as photosynthesis. So the correct option for this question is option -2 , primary production.

We can write the sentence like ,the proportion of chemical energy in assimilated food that is converted to consumers own new biomass is known as primary production.

3) species richness means the number of species present in a particular area .

Longitudinal gradient mainly in increases the species richness because the higher solar radiation increases the productivity .which leads to the increase in biological diversity.

So the correct option is option - 3) as we travel from northward to North pole to equator..