Advertisements
Advertisements
Question
Factors responsible for the rapid spread of bread mould on slices of bread are
- large number of spores
- availability of moisture and nutrients in bread
- presence of tubular branched hyphae
- formation of round shaped sporangia
Options
(i) and (iii)
(ii) and (iv)
(i) and (ii)
(iii) and (iv)
Solution
(i) and (ii)
Explanation -
Bread mould is a saprophyte which lives on dead and decaying plant material and obtain its nutrition. It reproduces asexually through production of thick-walled spores. These spores germinate to form hyphae on coming in contact with moist surface. So, the factors responsible for the rapid spread of bread mould on slices of bread are large number of spores and availability of moisture and nutrients in bread.
APPEARS IN
RELATED QUESTIONS
Production of new individuals from the vegetative part of parent is called ______.
What would be the chromosome number of resulting cells when a microspore mother cell with 40 chromosomes undergoes meiosis?
In the following Question, the Assertion, and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following
Assertion: In human beings, the female. play a major role in determining the sex of the offspring.
Reason: Women have two X chromosomes.
what are the kinds of reproduction?
Characters transmitted from parents to offspring are present in
A feature of reproduction that is common to Amoeba, Spirogyra and Yeast is that
Why is it not possible to reconstruct the whole organism from a fragment in complex multicellular organisms?
Differentiate between binary fission in Amoeba and binary fission in Leishmania.
| The most obvious outcome of the reproduction process is the generation of individuals of similar design, but in sexual reproduction they may not be exactly alike. The resemblances as well as differences are marked. The rules of heredity determine the process by which traits and characteristics are reliably inherited. Many experiments have been done to study the rules of inheritance. |
- Why an offspring of human being is not a true copy of his parents in sexual reproduction?
- While performing experiments on inheritance in plants, what is the difference between F1 and F2 generation?
- (A) Why do we say that variations are useful for the survival of a species over time?
OR
(B) Study Mendel's cross between two plants with a pair of contrasting characters.
RRYY × rryy Round Yellow Wrinkled Green He observed 4 types of combinations in F2 generation. Which of these were new combinations? Why do new features which are not present in the parents, appear in F2 generation?
Make your own cactus garden by collecting pieces cut from different kinds of cacti. Grow the variety in one single flat container or in separate pots.
