Download App

Human Reproduction — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Reproduction3 Marks
Question
Mention the difference between spermiogenesis and spermiation.
✓

Answer

Spermiogenesis: It is the transformation of spermatids into spermatozoa or sperms.
Spermiation: It is the release of sperms from seminiferous tubules.

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 "3 Marks Question" 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

Name the type of cell division that takes place in the zygote of an organism exhibiting haplontic life cycle.
→
Describe the experiment that helped demonstrate the semi-conservative mode of DNA replication.
→
  1. Explain two approaches of biodiversity conservation.
  2. Which conservation method is used to maintain the species of wildlife in their natural habitats?
→
Enlist the probable causes of infertility.
→
The image below shows two germinated seeds X and Y which belong to the same species. Seed X is produced by apomixis whereas seed Y is a product of sexual reproduction.
Image
A. Write the number of embryo(s), embryo sac(s) and ovules in the ovary of seed X.
B. How multiples embryos are formed in citrus fruits?
C. What advantage will plants developed from seed Y have over seed X?
→
Mrs. Peter and Mrs. James had babies at the same hospital. Mrs. Peter took home a girl, Nancy and Mrs. James received a boy, Richard. However, Mrs. James was certain she gave birth to a girl and brought suit against the hospital. Blood tests showed that Mr. James was type O, Mrs. James was type AB and Mr. and Mrs. Peter were both type B. Nancy was type A and Richard was type O. List the possible genotypes of each individual and then indicate the correct parents for each child.
Genotypes :
  1. Mrs. Peter ____________.
  2. Mr. Peter ______________.
  3. Nancy _____________.
  4. Mrs. James _________________.
  5. Mr. James ________________.
  6. Richard _______________.
  7. Whose baby is Nancy?
  8. Whose baby is Richard?
→
Describe the experiments that established the identity of 'transforming principles' of Griffith.
→
"The codon is a triplet and is read in a contiguous manner without punctuations." Provide the genetic basis for the statement.
→
A person has been diagnosed to be HIV+.

  1. Name the disease and the test which the person has to undergo.
  2. Write the full name of the pathogen involved and describe its structure.
  3. Which particular cells of this person are likely to get destroyed?

OR

The immune system of a person is suppressed. In the ELISA test, he was found positive to a pathogen.

  1. Name the disease the patient is suffering from.
  2. What is the causative organism?
  3. Which cells of the body are affected by the pathogen?
→
Transgenic animals are the animals in which a foreign gene is expressed. Such animals can be used to study the fundamental biological process, phenomenon as well as for producing products useful for mankind. Give one example for each type.
→