Zoology - Online Test
Q1. The release of sperms from Sertoli cells into the cavity of seminiferous tubules is called as
Answer : Option C
Explaination / Solution:
Spermiation is the process of release of sperms from Sertoli cells into the cavity of seminiferous tubules.
Q2. Base pairs found in 5 turns of DNA spirals are
Answer : Option C
Explaination / Solution:
Each turn of DNA spirals contains 10 base pairs. So, in five turns of DNA total number of Base pair is 5×10=50 base pairs.
Q3. A symbiotic relationship/interaction in which 'one species benefits and the other species is not affected' is called
Answer : Option B
Explaination / Solution:
Commensalism is a relationship between two organisms where one receives a benefit or benefits from the other and the other is not affected by it. In other words, one is benefited and the other is neither benefited nor harmed.
Example:
- Orchids - Some orchids grow on trees and that does not harm the tree.
- Pilot fish - Pilot fish live around sharks, sea turtles and rays and eat the parasites that live on them as well as leftover food they do not eat. Young pilot fish gather around jellyfish and seaweeds.
Q4. The gases which are transparent to solar radiation but retain long wave heat radiations are called
Answer : Option A
Explaination / Solution:
A greenhouse gas (often abbreviated as GHG) is a gas that both absorbs and emits radiation in the infrared range, commonly called thermal radiation or heat. When present in the atmosphere, these gases trap radiation in the form of heat, causing a warming process called the greenhouse effect.
These gases are transparent to solar radiation.
Q5. M- phase undergoes
Answer : Option C
Explaination / Solution:
Since, in mitosis the number of chromosomes in the parent and progeny cells is the same, it is also called as equational division.
Q6. Nucleosome is seen in
Answer : Option D
Explaination / Solution:
The nucleosome is the fundamental subunit of chromatin. Nucleosome is clearly seen in fungus called Yeast.
Q7. Praying mantis is a good example of
Answer : Option A
Explaination / Solution:
The Praying Mantis is a large insect from the order of Mantodea. It's called the "Praying" Mantis because it often stands in a pose that looks like it is praying.
Many animals have evolved to exhibit some form of camouflage, which is an adaptation that allows animals to blend in with certain aspects of their environment
Praying Mantids use camouflage to hide from predators and sneak up on prey. Different species vary in color from dark brown to green. These colors allow them to blend into their natural surroundings such as tree bark or green plant leaves.
Q8. Classification based on evolutionary and genetic relationship is called
Answer : Option A
Explaination / Solution:
The classification of organisms on the basis of evolutionary and genetic relationship is called phylogenetic system of classification. The organisms are arranged according to their evolution on earth.
Q9. In a rain shadow area biome is represented by
Answer : Option A
Explaination / Solution:
A rain shadow is a dry area on the leeward side of a mountainous area (away from the wind). The mountains block the passage of rain-producing weather systems and cast a "shadow" of dryness behind them. Wind and moist air is drawn by the prevailing winds towards the top of the mountains, where it condenses and precipitates before it crosses the top. The air, without much moisture left, advances behind the mountains creating a drier side called the "rain shadow".
Q10. Rate of fluorescence in a titer plate in ELISA is
Answer : Option C
Explaination / Solution:
The rate of fluorescence in a titer plate in ELISA is directly proportional to antigens present in the sample. This indicates presence of pathogen in the sample also.
