Showing posts with label class12-Biology. Show all posts
Showing posts with label class12-Biology. Show all posts

Monday, 25 July 2022

What is Life Span? - Class 12 Biology - Reproduction in Organisms #eduvictors #class12Biology

What is Life Span? - Class 12 Biology - Reproduction in Organisms

What is Life Span? - Class 12 Biology - Reproduction in Organisms #eduvictors #class12Biology


The period from birth to the natural death of an organism represents its life span. The lifespan of an organism is not necessarily correlated with its body size, it can vary from less than one day to more than 400 years. Irrespective of the long or short lifespan of an organism, death is a certain phenomenon, i.e. no individual is immortal, except for single-celled organisms like Amoeba.

Friday, 1 July 2022

Class 12 Biology - Human Reproduction (Questions and Answers) Part-1 #class12Biology #eduvictors #HumanReproduction

Class 12 Biology - Human Reproduction (Questions and Answers) Part-1

Class 12 Biology - Human Reproduction (Questions and Answers) Part-1 #class12Biology #eduvictors #HumanReproduction


Q1(NCERT). Fill in the blanks.

(a) Humans reproduce _____________________. (asexually/sexually)

(b) Humans are _____________________. (oviparous, viviparous, ovoviviparous)

(c) Fertilisation is _____________________ in humans. (external/internal)

(d) Male and female gametes are _____________________. (diploid/haploid)

(e) Zygote is _____________________. (diploid/haploid)

(f) The process of release of ovum from a mature follicle is called _____________________.

(g) Ovulation is induced by a hormone called _____________________.

(h) The fusion of male and female gametes is called _____________________.

(i) Fertilisation takes place in _____________________.

(j) Zygote divides to form _____________________ which is implanted in the uterus.

(k) The structure which provides a vascular connection between the foetus and uterus is called _______.

Thursday, 23 June 2022

Class 12 - Biology - Strategies for Enhancement in Food Production (MCQs) #class12Biology #eduvictors #NEET #biology

 Class 12 - Biology - Strategies for Enhancement in Food Production (MCQs)

Class 12 - Biology - Strategies for Enhancement in Food Production (MCQs) #class12Biology #eduvictors #NEET #biology


Q1(AIPMT 2010). Breeding of crops with high levels of minerals, vitamins and proteins is called

(a) Somatic hybridization 

(b) Biofortification

(c) Biomagnification 

(d) Micropropagation

Monday, 20 June 2022

Class 12 Biology - Evolution - Multiple Choice Questions #NEET #cass12Biology #eduvictors

Class 12 Biology - Evolution - Multiple Choice Questions

Class 12 Biology - Evolution - Multiple Choice Questions #NEET #cass12Biology #eduvictors


Q1. When two species of different genealogy come to resemble each other as a result of adaptation, the phenomenon is termed as

(a) microevolution 

(b) co-evolution

(c) convergent evolution 

(d) divergent evolution

Thursday, 16 June 2022

Class 12 Biology - Molecular Basis of Inheritance (MCQs) #class12Biology #NEET #eduvictors

Class 12 Biology - Molecular Basis of Inheritance (MCQs)

Class 12 Biology - Molecular Basis of Inheritance (MCQs) #class12Biology #NEET #eduvictors

Q1(NEET 2017). The final proof for DNA as the genetic material came from the experiments of 

(a) Griffith

(b) Hershey and Chase

(c) Avery, MacLeod and McCarty

(d) Har Gobind Khorana


Monday, 13 June 2022

Class 12 Biology - Principles of Inheritance and Variation - Multiple Choice Questions (MCQs) #class12Biology #NEET #eduvictors

Class 12 Biology - Principles of Inheritance and Variation - Multiple Choice Questions (MCQs) 

Class 12 Biology - Principles of Inheritance and Variation - Multiple Choice Questions (MCQs) #class12Biology #NEET #eduvictors


Q1. In Mendel’s experiments with the garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), and yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2 generation of the cross RRYY × rryy?

(a) Round seeds with yellow cotyledons, and wrinkled seeds with yellow cotyledons.

(b) Only round seeds with green cotyledons.

(c) Only wrinkled seeds with yellow cotyledons.

(d) Only wrinkled seeds with green cotyledons.

Friday, 10 June 2022

Class 12 Biology - Reproductive Health (MCQs) #biologyMCQs #NEET #eduvictors

Class 12 Biology - Reproductive Health (MCQs)

Class 12 Biology - Reproductive Health (MCQs) #biologyMCQs #NEET #eduvictors


Q1. From the sexually transmitted diseases mentioned below, identify the one which does not specifically affect the sex organs–

(a) Syphilis

(b) AIDS

(c) Gonorrhea

(d) Genital warts

Monday, 6 June 2022

Class 12 Biology - Human Reproduction (MCQs) #class12Biology #BiologyMCQs #NEET #eduvictors

Class 12 Biology - Human Reproduction (MCQs)

Class 12 Biology - Human Reproduction (MCQs) #class12Biology #BiologyMCQs #NEET #eduvictors


Q1. Seminal plasma in humans is rich in

(a) fructose and calcium 

(b) glucose and calcium

(c) Progesterone and testosterone 

(d) potassium and calcium


Monday, 30 May 2022

Class 12 Biology - Sexual Reproduction in Flowering Plants (MCQs) #class12Biology #NEET #eduvictors

Class 12 Biology - Sexual Reproduction in Flowering Plants (MCQs)

Class 12 Biology - Sexual Reproduction in Flowering Plants (MCQs) #class12Biology #NEET #eduvictors


Q1. In a cereal grain, the single cotyledon of the embryo is represented by
(a) coleoptile 
(b) coleorhiza
(c) scutellum 
(d) hypocotyl


Q2(NEET 2020). Vegetative propagule in Agave is termed as:
(a) rhizome 
(b) bulbil
(c) offset 
(d) eye

Monday, 23 May 2022

Class 12 Biology - Chapter: Reproduction in Organisms (MCQs) #reproduction #biologyMCQs #class12Biology #eduvictors

Class 12 Biology - Chapter: Reproduction in Organisms  (MCQs) 




Q1(NEET 2018). Which of the following flowers only once in its lifetime?

(a) Bamboo species 

(b) Mango

(c) Jackfruit 

(d) Papaya

Saturday, 23 April 2022

Class 12 Biology - Biotechnology and Its Applications (MCQs) #biotechnology #biologyMCQs #class12Biology #eduvictors

Class 12 Biology - Biotechnology and Its Applications (MCQs)

Class 12 Biology - Biotechnology and Its Applications (MCQs) #biotechnology #biologyMCQs #class12Biology #eduvictors


Q1(NEET 2021): A specific recognition sequence identified by endonucleases to make cuts at specific positions within the DNA is:

(a) degenerate primer sequence

(b) Okazaki sequences

(c) palindromic nucleotide sequence

(d) poly(A) tailsequence


Wednesday, 20 April 2022

Class 12 Biology - Biotechnology: Principles and Processes (MCQs) #biologyQuiz #Biotechnology #eduvictors

Class 12 Biology - Principles and Processes (MCQs)

Class 12 Biology - Biotechnology: Principles and Processes (MCQs) #biologyQuiz #Biotechnology  #eduvictors




Q1: The linking of antibiotic resistance gene with the plasmid vector became possible with

(a) DNA polymerase 

(b) exonucleases

(c) DNA ligase 

(d) endonucleases

Monday, 18 April 2022

Class 12 Biology -Human Health and Diseases (MCQs) #class12Biology #BiologyMCQs #eduvictors

Class 12 Biology -Human Health and Diseases (MCQs)

Class 12 Biology -Human Health and Diseases (MCQs) #class12Biology #BiologyMCQs #eduvictors


Q1: The organisms which cause diseases in plants and animals are called:

(a) Pathogens 

(b) Vectors

(c) Insects 

(d) Worms


Q2: The sporozoites that cause infection, when a female Anopheles mosquito bites a person, are formed in:

(a) Liver of the person

(b) RBCs of mosquito

(c) Salivary glands of the mosquito

(d) Intestine of mosquito

Wednesday, 13 April 2022

Class 12 Biology - Microbes in Human Welfare (MCQs) #biologyquiz #class12Biology #NEET #eduvictors

Class 12 Biology - Microbes in Human Welfare (MCQs)

Class 12 Biology - Microbes in Human Welfare (MCQs) #biologyquiz #class12Biology #NEET #eduvictors


Q1: A common biocontrol agent for the control of plant diseases is

(a) baculovirus 

(b) Bacillus thuringiensis

(c) Glomus 

(d) Trichoderma


Q2: Methanogens do not produce 

(a) oxygen 

(b) methane

(c) hydrogen sulfide 

(d) carbon dioxide