Download App

Human Reproduction — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Reproduction4 Marks
Question
Describe the human male reproductive system.
✓

Answer

self

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 "4 Marks Questions" from Human Reproduction→Human Reproduction — all question types→BIOLOGY STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

Match the sex-chromosome complements in Column I with the male/ female organisms in Column II.
S.No
Column I
S.No
Column II
A.
XO
1.
Human male
B.
XX
2.
Male bird
C.
XY
3.
Male grasshopper
D.
ZZ
4.
Female Drosophila
 
 
5.
Female bird
→
Write the differences in following-
(a) Write the causes of cancer.
(b) Explain Cancer detection
(c) Write the characters of cancer cells
(d) Write the types of cancer
→
Explain the process of fertilisation in human female, and trace the postfertilisation events in a sequential order up to implantation of the embryo.

OR

Explain the process of fertilisation and implantation in humans.

→
With a neat diagram explain the 7-celled 8-nucleate nature of the female gametophyte.
→
What does an Ecological Pyramid indicate? Explain the three different types of Upright Pyramids in nature with the help of an example of each.
→
What is meant by microorganisms in industrial products? How do microorganisms help us in making beverages? Explain.
→
  1. Draw a schematic labelled diagram of a fertilised embryo sac of an angiosperm.
  2. Describe the stages in embryo development in a dicot plant.
→

The above diagram shows a simplified biogeochemical cycle.

  1. Name the compound whose cycle is depicted.
  2. In what way do vehicles add this compound to atmosphere?
  3. What adverse effect does its excess have on the environment?
  4. Cite an event which depicts this effect in the modern times.
  5. Suggest two ways of reducing this effect.
→
Answer the following questions:
State and explain the law of dominance as proposed by Mendel.
→
Had Darwin been aware of Mendel’s work, would he been able to explain the origin of variations. Discuss.
→