CBSE Class 12 - Biology - Chapter - Evolution - Questions and Answers (#class12Bioogy)(#eduvictors)

Chapter - Evolution - Questions and Answers

CBSE Class 12 - Biology

1- Mark Questions


Q1: Who proposed Big Bang theory?

Answer: Abbe Lemaitre in 1931.


Q2: Who proposed Panspermia theory?

Answer:  Richter in 1865.


Q3: What was Panspermia theory?

Answer: Panspermia theory stated that  life came from outside in the form of spores.

Biology Quiz-5 (AIPMT/NEET/CET) (#biologyquiz)(#eduvictors)

Biology Quiz-5 

(AIPMT/NEET/CET)

Multiple Choice Questions

Q1: A particular species of plant produces light, non sticky pollen in large numbers and its stigma are long and feathery. These modifications facilitate pollination by

(a) Insects
(b) Water
(c) Wind
(d) Animals

CBSE Class 12 Sample Question Papers With Marking Scheme (2019-20)(#cbsepapers)(#eduvictors)

CBSE Class 12 Sample Question Papers With Marking Scheme (2019-20)

CBSE has released sample question papers along with marking scheme based on the new curriculum. Sample Papers for Class 12 are taken into consideration as the best option to understand the question paper pattern very well.  

Eduvictors provide collection of sample question papers prepared by various schools and institutes 

that help you to practice and get familiar with the question paper pattern. Solving an ample variety of sample papers, together with the last years' pattern papers, has been the recommendation to students.

Here are links of SQPs and Marking Schemes for various subjects:

CBSE Class 12 Biology - Chapter Biotechnology - Very Short Question Answers (#class12Biology)(#eduvictors)

Class 12 Biology - Chapter: Biotechnology

Very Short Question Answers

Q1: Name the molecular diagnostic techniques that should be referred to any patient for early diagnosis. 

Answer:
1) Recombinant DNA technology
2) Polymerisation chain reaction     
3) ELISA 


Q2: Give the term for rDNA, PCR and ELISA have a common value. 

Answer: rDNA, PCR and ELISA are tools of molecular diagnosis 


Q3: Give the term for replacing a defective mutant allele with a functional allele. 

Answer: Gene Therapy

NEET Pre-Medical Biology Quiz: Biomolecules - Set 4 (#NEETQuiz)(#eduvictors)

NEET Biology Quiz: Bio-molecules

(Set -4)

MCQs


Q1: Which of the following is a saturated fatty acid?

(a) Oleic Acid
(b) Linoeic Acid
(c) Archidonic Acid
(d) Palmitic Acid


Q2: Essential amino acids include

(a) leucine
(b) valine
(c) tryptophan
(d) all of these



Q3: Many elements are found in living organisms either free or in the form of compounds. One of the following is not found in living organisms.

(a) Silicon
(b) Magnesium
(c) Iron
(d) Sodium

AIPMT/NEET - Biology Quiz (#neetbiomcqs)(#eduvictors)

AIPMT/NEET - Biology Quiz 

Honey Bee
(credits: Sandeep Handa)

Multiple Choice Questions

Q1: Which of the following structure is not found in bryophytes?
(a) A cellulose cell wall
(b) Chloroplast
(c) Sporangium
(d) Root


Q2: Which of the following statement about Bryophytes is/are incorrect?

(a) They lack xylem and phloem.
(b) The cell walls of their water conducting cells are lignified.
(c) They exhibit alternating heteromorphic generations.
(d) The sporophyte is usually nutritionally dependent on the gametophyte.


Q3: Which of the following is responsible for peat formation? (AIPMT 2014)
(a) Marchantia
(b) Riccia
(c) Funaria
(d) Sphagnum

CBSE Class 12 - Biology - Biodiversity and Conservation - Questions and Answers(#cbsenotes)(#eduvictors)

Biodiversity and Conservation

Class 12 - Biology  

Questions and Answers

Q1: Defined biodiversity.

Answer: Biologists typically define biodiversity as the “totality of genes, species and ecosystems of an area”. It refers to the sum total of diversity that exists at genetic, species and ecosystem level of biological organisation.


Q2: Who coined the term 'biodiversity'?

Answer: The term was coined by socio-biologist Edward Wilson and was used by Walter G Rosen for the diversity of life forms.


Q3: What are the three inter-related levels of biodiversity?

CBSE Class 12 - Biology Sample Question Paper + Solution- (2018-19)(#cbsenotes)(#eduvictors)

CBSE Class 12 - Biology
 Sample Question Paper + Solution- (2018-19)

Biology is the study of life. All living things share five basic properties, passed down over millions of years from the first organisms to evolve on earth: cellular organization, metabolism, homeostasis, growth and reproduction, and heredity. Life’s organisms interact with each other at many levels, in ways simple and complex. Thus they show hierarchical organization. A variety of processes can produce evolutionary change. Most evolutionary biologists, however, agree with Darwin’s thinking that natural selection is the primary process responsible for evolution. Many such topics are covered in class 12 biology. 

Here follows the class 12  Biology sample question paper along with the marking scheme and answers for your assessment.

Class 9 - 12 - Biology - Know About Disease - Brief Notes About AIDS (#cbsenotes)(#eduvictors)

AIDS(A Brief Introduction)

Meaning of AIDS

✤ The word AIDS stands for Acquired Immuno Deficiency Syndrome. This means a deficiency of the immune system, acquired during the lifetime of an individual indicating that it is not a congenital disease [disease or abnormality present from birth]. ‘Syndrome’ means a group of symptoms.


✤ AIDS was first reported in 1981 and in the last twenty-five years or so, it has spread all over the world.

✤ Luc Montagnier, Françoise Barré-Sinoussi, and their colleagues at the Pasteur Institute in Paris were the first to report the discovery of the virus now called the human immunodeficiency virus (HIV) associated with AIDS.


Causes of AIDS

CBSE Class 9 - Cell Biology - 7 Points about Plasmolysis (#cbsenotes)(#eduvictors)

Cell Biology - 7 Points about Plasmolysis

Plasmolysis vs Flaccid vs Turgid
Credits: Wikimedia, Author: LadyOfHats

1. When a living plant cell loses water through osmosis there is shrinkage or contraction of the contents of the cell away from the cell wall. This phenomenon is known as plasmolysis
(plasma → fluid; lysis → disintegration, decomposition).


2. Only living cells, and not dead cells, are able to absorb water by osmosis.


3. Cell walls permit the cells of plants, fungi and bacteria to withstand very dilute [hypotonic] external media without shrinkage.

CBSE Class 11 - Biology - Understanding Plant Growth (#cbsenotes)(#eduvictors)

Understanding Plant Growth

Q1: Define growth.

Answer: Growth in an organism consists of a permanent and more or less irreversible increase in size, commonly accompanied by an increase in dry mass and amount of cytoplasm.


Q2: Define development.

Answer: The coordination of growth and differentiation of a single cell into multicellular tissues and organs is called development.


Q3: How the growth of living beings is different from non-living?

Answer: Growth in living beings is intrinsic or internal, in contrast to extrinsic growth observed in non-living objects.


Q4: How is plant growth different from animal growth?

Answer: Plant growth is generally indeterminate, i.e., continued throughout life while animal growth is non-continuous i.e. after a certain age, the ageing starts leading to death. In plants, the growth is diffused and localised while animal growth is uniform.


Q5: How plant growth is categorised?

AIPMT/ NEET CLASS 12 - BIOLOGY MCQs (#eduvictors)(#cbsenotes)

NEET/ AIPMT/ CET - BIOLOGY MCQs 

1. Unicellular algae, diatoms and protozoans are the members of 

(a) Monera
(b) Fungi
(c) Protista
(d) Plantae

2. Which of the following is also known as ‘amphibian of the plant kingdom’?

(a) Algae
(b) Bryophytes
(c) Pteridophytes
(d) Gymnosperms


3. Yeast is not included in protozoas in fungi because

(a) chlorophyll is absent
(b) it has eukaryotic organisation
(c) cell wall is made up of cellulose and reserve food material as starch
(d) some fungal hyphae grow in such a way that they give the appearance of pseudomycelium


4. An association between roots of higher plants and fungi is called

(a) lichen
(b) fern
(c) mycorrhiza
(d) None of these

CBSE CLASS 12 - Biology - Digestion - Five Digestive Juices (#cbsenotes)(#eduvictors)

Digestion - FIVE DIGESTIVE JUICES

Image credits: LadyOfHats (Wikimedia)

There are five digestive juices i.e.

① Saliva,

② Gastric juice

③ Pancreatic juice

④ Intestinal juice (succus entericus)

⑤ Bile juice

Class 11/12 - Biology - Classification of Plants (#cbsenotes)(#eduvictors)

Biology - Classification of Plants - Herbs, Shrubs and Trees and Other Types

Q1: Based on habit i.e. Based on height, duration and nature of stem, how plants are classified?

Answer:
① Herbs
② Shrubs
③ Trees


Q2: On the basis of On the basis of flowering frequency, how plants are classified?

Answer:
① Monocarpic - These plants flower and fruit only once in their lifetim
② Polycarpic - These plants bear flowers and fruits repeatedly.


Q3: On the basis of life span, how plants are classified?

Answer:

① Annuals
② Biennials
③ Perennials

CBSE Class 12 / AIPMT / NEET - Biology MCQs

Class 12 / AIPMT / NEET - Biology MCQs 

Multiple Choice Questions

Q1: Which of the following is a ‘club moss’ ?

(a) Selaginella
(b) Equisetum
(c) Lycopodium
(d) None of these


Q2: The morphological nature of rhizophore of Selaginella is _______

(a) Root like
(b) Stem like
(c) Both root and stem like
(d) Rhizoid like


Q3: Pinus is a _____

(a) Tree
(b) Shrub
(c) Herb 
(d) None of these

Class 12 - Biology - Human Reproduction System - Very Short Questions and Answers (#cbseNotes)(#eduvictors)

Human Reproduction System - Very Short Questions and Answers

Q1: Define menarche.

Answer:  A female's first menstrual period. It is marked by the maturation of ovaries.


Q2: Which female reproductive system that regulates the condition of the endometrium?

Answer: progesterone.


Q3: What is amenorrhea?

Answer: It is failure to menstruate.


Q4: What is erythroblastosis?

Answer: It is a disease that occurs when the infant’s blood and the mother’s blood are incompatible. It is due to RH factor incompatibility.

CBSE Class 10 - Biology - - Arteries vs Veins (#cbseNotes)

Biology - Arteries vs Veins

Areteries vs Veins
credits: Kelvinsong (Wikimedia) under CC-BY-SA-3.0

Arteries and Veins are parts of closed circulatory system and both carry blood. Here follows the differences between the two:

CBSE Class 12 - Biology - Human Nutrition (Worksheet) (#cbseNotes)

Human Nutrition (Worksheet)

Digestive System
By Mariana Ruiz Villarreal(LadyofHats) (Own work)
[Public domain], via Wikimedia Commons

Fill in the blanks


1. ______________ is a hormone released by the mucosa of duodenum.


2. The process by which the complex food materials are changed to simple molecules is called _______.


3. Trypsinogen in the presence of __________ enzyme breaks into Trypsin + Inactive dipeptides.


4. Bile salts with the help of _________ emulsify fats.

CBSE CLASS 12 - Biology - CH 5 - Principles of Inheritance and Variation - Important Definitions (#cbseNotes)

Principles of Inheritance and Variation - Important Definitions

CBSE CLASS 12 - Biology

Q1: Define heredity.

Answer: It can be defined as the transmission of characters from one generation to successive generations of living organisms.


Q2: Define Alleles

Answer: The various forms of a gene are called alleles.


Q3: What are multiple alleles?

Answer: If a gene has more than two alleles then they are said to be multiple alleles. e.g. In humans ABO blood groups is an example for multiple allelism.


Q4: What is genotype?

Answer: The genetic constitution of an organism is its genotype.


Q5: What is phenotype?

Answer: The external / observable characteristics of an organism constitute its phenotype.

CBSE Class 12 - Biology Syllabus and Q Paper Design (2017-18) (#cbseNotes)

Biology -Syllabus (2017-18)

CBSE Class 12

Here presents the prescribed syllabus for Class 12 Biology for the curriculum 2017-18.