Question

Which of the following is incorrect?
I. Bryophyllum and Kalanchoe can be vegetatively propagated by leaf segments.
II. Mango and Guava are propagated through grafting.
III. Individuals of a clone have the same height.
IV. Roots are used in the vegetative propagation of sweet potatoes.
V. The Oestrus cycle is found in mammalian females other than primates.
A) I and II
B) Only III
C) II and IV
D) IV and V

Answer 1

Bryophyllum and Kalanchoe have leaf buds. Grafting is a technique in which two different plants are fused to form a new composite plant. Clones are identical copies of any organism. Sweet potato is a tuberous type of underground modification of root. Mammals have oestrus and a menstrual cycle.

Complete answer:
A) Bryophyllum and Kalanchoe can be vegetatively propagated by leaf segments:
Bryophyllum and Kalanchoe can be both propagated vegetatively by leaves. This is because small buds grow on the margins of the leaves of both these plants. These buds develop into new plants and get detached from the parent plant.
B) Mango and Guava are propagated through grafting:
Mango and guava are grown vegetatively through grafting to obtain the desired type of plant. Old forms are generally disease resistant and they have a good water-absorbing capacity. Therefore, they are often considered for stock.
C) The individual of a clone have the same height:
Clones of an organism have the same genotypic constitution as the parent organism. However, the phenotype can vary from the parent.
D) Roots are used in the vegetative propagation of sweet potato:
The sweet potato grows vegetatively with the help of adventitious roots. Adventitious roots are the roots that help the plant to reproduce asexually.
E) The oestrus cycle is found in mammalian females other than primates:
The primate mammals have a menstrual cycle. The oestrus cycle is also known as the oestrous cycle found in mammalian females other than the primates.
Hence, the correct answer is option B.

Note: Cloning is the process of producing identical organisms that have the same DNA. Clones are generally produced through asexual reproduction. Cloning can also be described as the process in which identical copies are created with the help of DNA fragments.