Which of the following is an r-species

"Birds and mammals attain greater body size in colder regions than warmer regions." - Choose the correct option.

A biologist studies the population of eats in a barn. He found that the average natality was 250, average mortality is 240, immigration is 20 and emigration to be 30. The  in population is

Pick out the correct statement regarding K-selected species

Death rate is also known as ___________

Assertion: Rapidly growing population has larger proportion of young individuals.
Reason: Natality is high in such a population.
Codes:
A. If both A and R are true and R is correct explanation for A
B. If both A and R are true but R is not the correct explanation for A
C. If A is true but R is false
D. If both A and R are false

(a) Bacteria in calcium
(b) Cross pollination by bees
(c) Sucker fish and shark
(d) Sea anemone and hermit crab

i) Birds visiting Vedanthangal show 'migrate' response.
ii) Fertility and Fecundity determine the mortality in a population.
iii) K selected species have long life expectancy.
iv) Degree of competition is high when animals have different sources of food.
a) i and iii
b) ii and iii
c) ii and iv
d) iv only

What is Zero Stress?

State Allen's rule.

What is Q₁₀ value? How it is calculated?

Camels are well adapted to xeric conditions, how?

Draw a sketch to show J and S shaped growth form of a population.

Define migration.

Differentiate between Tundra and Taiga Biomes.

Differentiate between r-selected species and k-selected species