Tag: introduction to reproduction

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Questions Related to introduction to reproduction

Multiple choice biology animals in daily life introduction to reproduction poultry farming food from animals

In poultry industry, production of hatching eggs is more expensive than the production of market eggs mainly because

  1. Cost of males and their depreciation value is high.

  2. Mortality among females is usually lower when they are mated with males.

  3. Number of eggs produced by hatchery flock are to be sold only as market eggs.

  4. Some of the eggs produced by hatchery flocks are not acceptable for incubation.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In the poultry industry, production of hatching egg is more expensive because it requires optimum temperature fo incubation. But the major factor is the weight of the hatching egg and chick weight. Under optimal egg storage and incubation conditions, chick weight is 67-69 per cent of egg weight at setting. Therefore, the more uniform the egg weight, the more uniform the chick weight. Breeder uniformity determines uniformity in the hatching eggs produced; the more uniform the breeder flock, the more uniform the egg weights. Hence, some of the eggs produced by hatchery flocks are not acceptable for incubation and is rejected. So, the production of hatching eggs is more expensive than the production of market eggs.

Multiple choice biology animals in daily life introduction to reproduction poultry farming food from animals

Which of the following is the most infective type of bird flu? 

  1. H5N1

  2. H7N9

  3. H1N1

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
H5N1 is the most infective type of influenza virus that infects geese, turkey, chicken and ducks. They can also spread to farm poultry through the wild birds. They rarely infect humans. In case of human infection the disease is fatal. 
So, the correct answer is 'H5N1'
Multiple choice biology animals in daily life introduction to reproduction poultry farming food from animals

Put a tick mark against the correct alternative in the following statement:
Identify the indigenous breed of poultry of India

  1. White leghorn

  2. HH-260

  3. Aseel

  4. B-77
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The indigenous breed of poultry of India is Aseel. It is noted for its pugnacity, high stamina, majestic gait and dogged fighting qualities.

Hence, the correct answer is 'Aseel'

Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

Asexual reproduction is related to

  1. Amphimixis

  2. Agamospermy

  3. Vegetative propagation

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
There are two modes of reproduction in plants: Sexual reproduction and Asexual reproduction. 
In sexual reproduction, there is the fusion of gametes of two different parents (called as syngamy) whereas, in sexual reproduction, offspring is formed from a single parent without the formation of gametes. Amphimixis is a kind of sexual reproduction which involves the meiosis and syngamy. A special type of asexual reproduction is there which is known as Apomixis in which there is seed formation without the fusion of gametes. Apomixis is further divided into two categories: Vegetative propagation and agamospermy. In vegetative propagation, any part of the plant may develop into a new plant. In agamospermy, plant propagation occurs by means of apomictic seeds or asexual seeds. 
Therefore, both vegetative propagation and agamospermy are types of asexual reproduction.
So, the correct answer is D.
Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

Why seed dispersal is important?

  1. Survival of plant

  2. Introduction of plant

  3. Adaptation of plant

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

  • Dispersal of seed is important as if seeds germinate near to parent plants it will increase a lot of competition for air, water, and food as well. 
  • If competition increases it will lead to the death of the species and dispersal also leads to exposure to a new environment that helps in adaptation and evolution.

So, the correct option is 'Survival of plant'.

Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

Seeds tarvel with water is filled with

  1. Water

  2. Air

  3. Protein

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

Seeds that travel in water is modified certain mechanism that make them light and filled with air so that they are able to travel a long distance and reach to places that are far from the parents. Its best example is the modification of mesocarp of coconut that helps it in hydrochory and able it to float a long distance.

So, the correct option is 'Air'

Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

Which of the following is correct for r-selected spices?

  1. Large number of progeny with small size

  2. Large number of progeny with large size

  3. Small number of progeny with small size

  4. Small number of progeny with large size
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In r selected species the populations have a large number of offsprings while in k-selected species, the populations have a small number of offsprings. However, the offspring size in k-selected species is larger than that of r-selected species. 

So, the correct option is 'Large number of progeny with small size'.