Some species of flatfishes have cycloid scales on the blind side and ctenoid scales on the side of the body with eyes. Further Reading: List of... View Article
In bony fish, fish scales are broadly classified into the following types: Cycloid scales - these scales are uniform and have a smooth texture.... View Article
Also known as Ichnofossils, trace fossils are the geological records of behaviours and activities of extinct organisms. Do note that such fossils... View Article
a) After zygote formation b) At the time of fusion of a sperm with an ovum c) Prior to ovulation d) At the time of copulation Answer: (b)... View Article
a) They are useful in genetic engineering. b) Sticky ends can be joined by using DNA ligases. c) Each restriction enzyme functions by inspecting... View Article
a) Release of GreenHouse gases b) Disposal of e-wastes c) Transport of Genetically modified organisms from one country to another d) Emission of... View Article
a) Industrial melanism b) Natural selection c) Adaptive radiation d) Convergent evolution Answer: (d) Further Reading: List of 25 Important... View Article
a) Female gametocytes b) Male gametocytes c) Trophozoites d) Sporozoites Answer: (d) Further Reading: List of 25 Important Topics in Biology... View Article
a) They have DNA with a protein coat. b) They have free DNA without a protein coat. c) They have RNA with a protein coat. d) They have free RNA... View Article
a) Atrial natriuretic factor causes vasoconstriction b) Decrease in secretion of renin by JG cells c) More water reabsorption due to under... View Article
a) Senescence b) Dormancy c) Log phase d) Lag phase Answer: (c) Further Reading: List of 25 Important Topics in Biology for Competitive Exams... View Article
A transitional fossil can showcase the evolutionary changes which occur between a common ancestor and its descendants. In other words, it... View Article
Fossils cannot provide information such as the colour of the organism, their sounds, and most of their behavior. Further Reading: List of 25... View Article
When absolute dating methods are deemed impractical, relative dating methods are used. Further Reading: List of 25 Important Topics in Biology... View Article
With the careful study of geological maps, paleontologists can identify suitable areas to prospect fossils. However, as a general rule of thumb,... View Article
Fossils tell us how an animal may have looked in life. Some, such as coprolites (fossilised faeces) give us clues about an animal’s diet.... View Article
The heaviest bony fish in the world is the ocean sunfish. The heaviest cartilaginous fish and the heaviest of all fishes is the whale shark.... View Article
