Justify with the help of an example where a deliberate attempt by humans has led to the extinction of a particular species.

(a) What is adaptive radiation. (b) Explain with the help of suitable example where adaptive radiation has occurred to represent convergent evolution.

Study the four statement (i-iv) given below and select the two correct ones out of them (i) A lion eating a deer and a sparrow feeding or grains are ecologically similar in being consumers. (ii) Predator star fish Pisaster helps in maintaining species diversity of some invertebrates (iii) Predators ultimately lead to the extinction of prey species (iv) Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders The two correct statements are

Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?

What are exotic species? Explain with the help of two examples how the exotic species disturb the native species of an ecosystem.

Explain with the help of a suitable example the inheritance of a trait where two different dominant alleles of a trait express themselves simultaneously in the progeny. Name this kind of inheritance pattern.

(a) define electrie flux. Write its, S.I unit. " Gauses's law in electrostatis is true for any closed surface, no matter what its shape or size is. Justify this statement with the help of a suitable example. (b) Use Gauss's law to prove that the electric field inside a uniformly charged spherical shell is zero.

Can you think of situation where we deliberately went to make a species extinct? How would you justify it?

Mass extinction of species has occurred during

With the help of one example, explain the phenomena of co-dominance and multiple allelism in human population.

Read the below statements and select the appropriate option. a. Experimental removal of Pisaster resulted in the extinction of more than species of invertebrates. b. Nearly 20 percent of all insects are known to be phytophagous. c Predators help to maintain species diversity.