Advertisements
Advertisements
प्रश्न
Suggest a possible explanation why the seeds in a pea pod are arranged in a row, whereas those in tomato are scattered in the juicy pulp.
उत्तर
In a fruit, seed arrangement depends on type of placentation. Pea and tomato shows different placentation. Pea shows marginal placentation while tomato shows axile placentation.
APPEARS IN
संबंधित प्रश्न
What is the effect of DNA copying, which is not perfectly accurate, on the reproduction process? How does the amount of DNA remain constant though each new generation is a combination of DNA copies of two individuals?
Give two differences between a zygote and a foetus.
Describe the various steps involved in the sexual reproduction in animals. Draw labelled diagrams to show the fertilisation of an ovum (or egg) by a sperm to form a zygote
Give reason for the following:
The parents and off-springs of organisms reproducing sexually have the same number of chromosomes.
Distinguish between a gamete and a zygote.
The figure given alongside shows the human male reproductive organs. Which structures make sperms and seminal fluid?
(a) V makes sperms and X makes seminal fluid
(b) W makes sperms and Y makes seminal fluid
(c) X makes sperms and W makes seminal fluid
(d) Y makes sperms and V makes seminal fluid
Define the term Fetilization.
Define the term Implantation.
Mention the common method of reproduction in Flatworm.
Name the organ involved in the following:
Fertilisation of ovum by tile sperm.
Meiosis is an essential event in the sexual life cycle of any organism. Give two reasons.
Identify the labels from the given diagram.
In an ovule, meiosis occurs in ______
Choose the correct answer from the options given below:
Which of the following is a post-fertilization event in flowering plants?
- Eggs of both are formed only once in a lifetime
- Both the angiosperm egg and human egg are stationary
- Both the angiosperm egg and human egg are motile transported
- Syngamy in both results in the formation of zygote
Which of the following is a primary sex organ in a mammal?
In telolecithal egg, the yolk is found:
With which type of reproduction do we associate the reduction division? Analyse the reasons for it.
'Fertilisation is not an obligatory event for fruit production in certains plants'. Explain the statement.