Tag: zoology

Quizzes (289) Questions (5869)

Questions Related to zoology

Multiple choice zoology plant reproduction different modes of reproduction sexual and asexual reproduction lifespan, reproduction and variation

The daughter cells produced by a sexual reproduction are genetically identical to the parent cell.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The statement is false. The daughter cells produced by asexual reproduction are similar to their parent. In contrast, sexual reproduction produces a similar but genetically different offspring. In the process of sexual reproduction, haploid gametes produced by the meiotic division fuses to form a diploid zygote. A child inherits half of the genetic material from each parent. So, it may be they look alike but they are not identical to their parents. Instead, they have the combination of characteristics inherited from both parents.
Multiple choice zoology plant reproduction different modes of reproduction sexual and asexual reproduction lifespan, reproduction and variation

The diseases caused by using mosquito repellents are 

  1. Blood related diseases

  2. Fits

  3. Bronchial diseases

  4. Kidney related diseases
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

There are harmful and toxic chemicals present in the mosquito repellents and coils like the pyrethrum. These molecules when inhaled may cause diseases like asthma, bronchitis and another type of chronic lung infections. These are collectively referred as the bronchial diseases. 

Thus, the correct answer is option C. 

Multiple choice zoology plant reproduction different modes of reproduction sexual and asexual reproduction lifespan, reproduction and variation

Which of the following perform reproduction in plants?

  1. Roots

  2. Stem

  3. Flower

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Flowers contain the reproductive structures: stamens (male) and carpels (female). Stamens produce pollen grains, which contain two sperm cells, while carpels contain the egg cells. Seeds develop following pollination and fertilization (fusion of the male and female gametes). So the correct option is "Flower".

Multiple choice zoology plant reproduction different modes of reproduction sexual and asexual reproduction lifespan, reproduction and variation

Production of new individual from parent  is called as

  1. Reproduction

  2. Formation

  3. Cloning

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When two parents are involved in reproduction, the method is called sexual reproduction. The male and female gametes fuse during fertilization to produce the zygote. The zygote subsequently develops into an embryo which further develops into a new individual. So the correct option is "Reproduction".

Multiple choice zoology plant reproduction different modes of reproduction sexual and asexual reproduction lifespan, reproduction and variation

In which of the following process new plant produces without seeds?

  1. Asexual reproduction

  2. Sexual reproduction

  3. Vegetative propagation

  4. Both A and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Vegetative propagation is a form of asexual reproduction where plants grow from vegetative parts like stems, roots, or leaves without seeds. Since asexual reproduction is the broader category that includes vegetative propagation, both options A and C are correct.

Multiple choice zoology plant reproduction different modes of reproduction sexual and asexual reproduction lifespan, reproduction and variation

A genetic clone is

  1. Plants produced by asexual means

  2. Hybrid produced by sexual means

  3. Homozygous plant produced by sexual means

  4. Heterozygous plant produced by sexual means
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A group of organisms, genetically related with one another and are formed from a single parent by means of asexual reproduction. In the genetic clone, all progeny are morphologically and genetically related with one another.

So, the correct answer is 'plants produced by asexual means’

Multiple choice zoology plant reproduction different modes of reproduction sexual and asexual reproduction lifespan, reproduction and variation

Offspring are individuals developed as a result of

  1. Vegetative multiplication

  2. Asexual reproduction

  3. Sexual reproduction

  4. All the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The process of formation of offsprings or progeny is called Reproduction. It may be vegetative or asexual or sexual types. The progeny formed by vegetative or asexual methods are looks like parents, but progeny formed by sexual reproduction shows variations with parents.

So, the correct option is ‘All the above’

Multiple choice zoology plant reproduction different modes of reproduction sexual and asexual reproduction lifespan, reproduction and variation

Why is it important for plants to scatter seeds?

  1. To avoid overcrowding which results in unhealthy plants

  2. To prevent the seeds from becoming parasites to the parent plants

  3. To ensure that plants of a particular type will be spread to new places

  4. Both A and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Scattering of seeds ensures the spread of species over the maximum area which protects it and it also prevents the growth of the same plant at one place and reduces the competition of food and other resources hence reduces competition and over-crowding.

So the correct option is 'Both A and B'.

Multiple choice zoology plant reproduction different modes of reproduction sexual and asexual reproduction lifespan, reproduction and variation

In dioeciously species, genetically female plants can be induced to produce male flowers by the application of.

  1. IAA

  2. Ethylene
  3. $GA _3$

  4. ABA
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In many dioecious species, the application of auxins like IAA (Indole-3-acetic acid) can induce the development of male flowers on genetically female plants by altering hormonal balance.