Zoology - Organisms and Populations Question with Solution | TestHub
Which of the following statement/s is/are WRONG?
I. Mammals from colder climates generally have shorter ears and limbs to minimise heat loss.
II. The UV component of the spectrum is harmful to many organisms.
III. The tiger census in our national parks and tiger reserves is often based on actual headcounts.
IV. Some desert plants likeOpuntia, have no leaves - they are reduced to spines.
V. In brood parasitism, the parasitic bird lays its eggs in the nest of its host and does not allow the host incubate them.
Options:
Answer:
Solution:
Mammals from colder climates generally have shorter ears and limbs to minimise heat loss. This is called the Allen’s rule.
Exposure to higher concentration of UV rays can lead to mutation resulting in skin cancer. It can also cause permanent damage to the eyes by destroying the retinal cells. UV rays have been found to cause mutational changes in the immune cells and reducing the immune system.
In our country, every year, the tiger census is carried out based on their pug marks and fecal pellets of the tigers to determine the number of tigers in our country.
Some desert plants likeOpuntia have adapted to survive in the extreme conditions by modifying their leaves to spine that reduces transpiration. Also, the stem is modified in thick flattened green structure that can perform photosynthesis.
Brood parasitism in birds is a fascinating example of parasitism in which the parasitic bird lays its eggs in the nest of its host and lets the host incubate them. During the course of evolution, the eggs of the parasitic bird have evolved to resemble the host’s egg in size and colour to reduce the chances of the host bird detecting the foreign eggs and ejecting them from the nest.
