Tag: biology

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Questions Related to biology

Multiple choice biology the life cycle of animals how do animals reproduce? excretory, nervous and reproductive system structure and functions of living organisms -ii

In crocodiles male sex is predominant at

  1. Low temperature

  2. Intermediate temperature

  3. High temperature

  4. Ratio is genetically determined.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In crocodilians, sex determination is temperature-dependent. Males are typically produced at higher temperatures, while females are produced at lower temperatures.

Multiple choice biology the life cycle of animals how do animals reproduce? excretory, nervous and reproductive system structure and functions of living organisms -ii

Choose the correct answers from the alternatives given. 
Reproduction

  1. is a universal feature of all living organisms

  2. produces genetic variation that is important in survival of a species

  3. enables a species to persist over long periods of time

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Reproduction is a biological process by which new individual organism is produced from their parents. Reproduction is a fundamental feature of all life. Reproduction helps the species to live a long period of life. Sexual reproduction also links with a variation in species which help in them for survival. 

Hence, the correct answer is 'all of the above'

Multiple choice biology the life cycle of animals how do animals reproduce? excretory, nervous and reproductive system structure and functions of living organisms -ii

State whether the following statements are true or false.
Humans have greater reproductive potential than bacteria

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • A human being a complex eukaryotic organism with a well developed reproductive system have greater reproductive potential and since the variation is seen in the offspring chances of survival are most.
  • Bacteria being a simple prokaryotic organism with a not so developed reproductive system. Their reproduction is limited by the availability of resources.

Hence, the correct answer is 'True'.

Multiple choice biology the life cycle of animals how do animals reproduce? excretory, nervous and reproductive system structure and functions of living organisms -ii

In mammals the testes lies in scrotal sacs due to-

  1. Presence of urinary bladder.

  2. Presence of rectum.

  3. Long vas-deferens.

  4. Requirement of low temperature for spermatogenesis.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The testes in mammals are located outside the body cavity in the scrotum because spermatogenesis requires a temperature slightly lower than the core body temperature.

Multiple choice biology the life cycle of animals how do animals reproduce? excretory, nervous and reproductive system structure and functions of living organisms -ii

Consider the following effects of genetic engineering:
1. Disease resistance
2. Growth promotion
3. Cloning
4. Longevity
Of these effects, those that have been tried out with a certain amounts of success include

  1. 1, 2 and 4

  2. 2, 3 and 4

  3. 1, 3 and 4

  4. 1, 2 and 3
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Genetic engineering allows of plants or animals to be modified so their maturity can occur at a quicker pace. Engineering can allow this maturity to occur outside of the normal growth conditions that are favorable without genetic changes as well. Even if there is higher levels of heat or lower levels of light, it becomes possible to expand what can be grown in those conditions. Genetic modification can help to create resistance to common forms of organism death. Pest resistance can be included into the genetic profiles of plants so they can mature as a crop without any further additives. Animals can have their genetic profiles modified to reduce the risks of common health concerns that may affect the breed or species. This creates the potential for an extended lifespan for each organism. With genetic engineering, new products can be created by adding or combining different profiles together. This process is called cloning. This makes it possible for more people to get what they need nutritionally, even if their food access is limited, and this could potentially reduce global food insecurity.

So the correct option is '1, 2 and 3'.

Multiple choice biology the life cycle of animals how do animals reproduce? excretory, nervous and reproductive system structure and functions of living organisms -ii

India's indigenous pigs generally give birth to __________ young ones a time?

  1. 6-8

  2. 4-6

  3. 2-4

  4. 8-10
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Indigenous species are the ones that are found naturally in a particular habitat or they are native to that place.

The indigenous pigs give birth to around 4-6 pigs or young ones. They are known as litter.

So, the correct option is '4-6'

Multiple choice biology the life cycle of animals how do animals reproduce? excretory, nervous and reproductive system structure and functions of living organisms -ii

Introduction of foreign genes for improving genotype is

  1. Biotechnology

  2. Tissue culture

  3. Vernalisation

  4. Genetic manipulation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Genetic engineering is the process of manually adding new DNA to an organism. The goal is to add one or more new traits that are not already found in that organism. Gene manipulation is also sometimes called the genetic engineering. It is a general term for any method which manipulate with the genetic material. Gene manipulation includes gene splicing, use of recombinant DNA, forming of the monoclonal antibodies or PCR (polymerase chain reaction).

Therefore, the correct answer is option D.

Multiple choice biology the life cycle of animals how do animals reproduce? excretory, nervous and reproductive system structure and functions of living organisms -ii

Biotechnology is a (an) 

  1. Science to culture bacteria

  2. Application of biological organisms to study genetics

  3. Application of biological organisms and systems to manufacture industrial products useful to mankind

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Biotechnology is a broad discipline in which biological processes, organisms, cells or cellular components are exploited to develop new technologies. New tools and products developed by biotechnologists are useful in research, agriculture, industry and the clinic.
Therefore, the correct answer is option C.
Multiple choice biology the life cycle of animals how do animals reproduce? excretory, nervous and reproductive system structure and functions of living organisms -ii

Which of the following can show somatogenic reproduction?

  1. Paramecium

  2. Amoeba

  3. Hydra

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Asexual reproduction is also called somatogenic reproduction, in these new organisms are produced from the somatic part of the parent organism.

So, the correct option is 'All of these'.

Multiple choice biology classification of plants thallophyta cryptograms kingdom plantae

The characters of thallophyta is/are

  1. Plant body is thallus.

  2. Non-vascular plant.

  3. Sex organs are unicellular and without jacket of sterile cell.

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

Thallophytes lack differentiation of plant body into the stem and leaves. The plant body is called as a thallus. They lack vascular tissue, the sex organs are unicellular and when multicellular, all are fertile. Thus, the correct answer is option D.