Which of the following is a feature of Equus?
(a) Three digits with hoof on each forelimb and hindlimb
(b) Four digits with hoof on each forelimb and two digits with hoof on each hindlimb
(c) Two digits with hoof on each forelimb and hindlimb
(d) One digit with hoof on each forelimb and hindlimb
WBBSE
Class X
Life Science
04 (a) Evolution
01 Mark
2024
(d) One digit with hoof on each forelimb and hindlimb.
Explanation:
The evolution of the modern horse (Equus) saw progressive reduction in the number of digits. The earliest ancestors had multiple digits, but through evolutionary adaptation for speedy running, the present-day Equus possesses only one functional digit, each with a single hoof, on all four limbs. The other digits exist as splint bones and are vestigial.
Related Questions
More WBBSE Easy level questions
1/12
Q.
Which one of the following is the best example of convergent evolution and similarity due...
A.
(a) Wing structure of bat and bird Explanation: The wing structure of...
Q.
Which of the following is not a tenet of Darwinism? (a) Struggle for existence (b)...
A.
(d) Inheritance of acquired character Explanation Darwin's theory of evolution includes the...
Q.
Which of the following is an inference of Darwin’s theory of evolution? (a) Natural Selection...
A.
(a) Natural Selection. Explanation: Darwin's theory of evolution is primarily known as...
Q.
What is his first observation of Darwin in his theory related with evolution?
A.
Prodigality of reproduction. Explanation: Darwin observed that organisms show prodigality of reproduction,...
Q.
What information related to evolution can be obtained from the discussion on comparative structure of...
A.
The comparative structure of hearts in different vertebrate groups provides important information...
Q.
Prepare a list of reactants used and products in the experiment of Miller and Urey...
A.
Reactants Products Methane (CH4) Organic compounds Ammonia (NH3) Amino acids Hydrogen (H2)...
Q.
Match the words in Column A with the most appropriate words in Column B and...
A.
Question No. Column A Term Column B Description 2.13 Adrenaline (f) Increases...
Q.
Which theory can be reached from the comparative study of the embryos of different vertebrate...
A.
Theory of Evolution (Common origin) Explanation: The comparative study of embryos of...
Q.
Which reactants were used in the experiment of Miller and Urey regarding the chemical origin...
A.
(b) Water, Methane, Ammonia, Hydrogen Explanation Stanley Miller and Harold Urey proved...
Q.
Identify the features of homologous organs- (a) Different by structure but identical by origin and...
A.
(d) Identical by origin and structure but different by function Explanation Homologous...
Q.
Equus possessed 4 digits in the forelimb and three digits in the hindlimb
A.
False Explanation: In the evolutionary series of horse, the modern horse Equus...
Q.
Ontogeny repeats ____
A.
Phylogeny Explanation: Comparative embryology states that early embryos of fish, frog, lizard,...