Download App

Human Reproduction — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Reproduction2 Marks
Question
Draw the microscopic structure of a human sperm and relate its different parts with their functions.
OR
Draw a labelled diagram of the microscopic structure of a human sperm. Explain the functions of each part.
✓

Answer

Functions:
  1. Acrosome contains enzymes that help in dissolving egg envelopes and gain entry into the cytoplasm of the ovum.
  2. Middle piece contains a number of mitochondria and provide energy for the movement of sperm in the female genital tract, towards the ovum.
  3. Tail- The movement of tail is responsible for the motility of sperm towards the ovum.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the following questions." from Human Reproduction→Human Reproduction — all question types→BIOLOGY STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

Identify A, B, C and D in the replication of HIV (retrovirus).
→
Who was the first to map chromosomes? What formed the basis for it?
→

Classify the given disease to their cause given in Column B.
(Ethylene, GA, Deficiency of BO, Deficiency of Cu)

Column AColumn B
(1) Brown heart disease————-
(2) Bakane disease of Rice————
(3) Die back of shoot————-
(4) Degreening of Banana————-
→
Write an account on Montreal Protocol.
→
Distinguish between
Grazing food chain and detritus food chain.
→
A relevant portion of B-chain of haemoglobin of a normal human is given below:

The codon for the sixth amino acid is GAG. The sixth codon GAG mutates to GAA as a result of mutation 'A' and to GUG as a result of mutation 'B'. Haemoglobin structure did not change as a result of mutation 'A', whereas haemoglobin structure changed because of mutation 'B', leading to sickle-shaped RBCs. Explain giving reasons how could mutation 'B' change the haemoglobin structure or bring down mutation and not mutation 'A'.
→
Give one example of complete sex linkage.
→
What are we referring to when we say 'simple organisms' or 'complex organisms'?
→
Why do people living in high altitude have more haemoglobin and high RBC count?
→
Why are a fig tree and its partner wasp considered a good example of mutualism?
→