Q1: The outermost and innermost wall layers of microsporangium in an anther are respectively.
(a) Endothecium and tapetum
(b) Epidermis and endodermis
(c) Epidermis and middle layer
(d) Epidermis and tapetum
Q2: Which of the following fruit is a case of parthenogenesis?
(a) Fruit without seeds after pollination
(b) Fruit with seeds after pollination
(c) Fruit with viable seeds without fertilization
(d) Fruit with viable seeds after fertilization.
Q1: Which of the following statements is wrong for viroids?
(a) They cause infections.
(b) Their RNA is of high molecular weight.
(c) They lack a protein coat.
(d) They are smaller than viruses.
Q1: Define life span.
Answer: Life span is the period from birth to the natural death of an organism.
Q2: What is the life span of the following organisms?
(a) Mayfly
(b) Human Being
(c) Parrot
(d) Rice Plant
(e) Sequoia Trees
(f) Butterfly
Answer:
(a) Mayfly - 1 day
(b) Human Being - 100 years
(c) Parrot - 140 years
(d) Rice Plant - 3 to 4 months
(e) Sequoia Trees - 3000 to 4000 years
(f) Butterfly - 1 to 2 weeks
Q1(MCQ): Clones are
(a) Morphologically similar
(b) Genetically similar
(c) Both (a) and (b)
(d) None of these
Answer: (c) Both (a) and (b)
Clones are morphologically and genetically similar individuals.
Q2: Define Parthenogenesis.
Answer: Parthenogenesis is the development of an egg into an embryo without fertilisation. e.g. in rotifers, honeybees, turkey and some lizards.
Q1: Define immunity.
Answer: Immunity means resistance to infections and antigens. Immunity is the capacity of an organism to resist or defend itself from the development of a disease.
Q2: What is an antigen? Give some examples.
Answer: Any substance or molecule that induces the immune system to produce antibodies against it is called an antigen. Examples include pathogens, virus, pollens, chemicals etc.
Q3: Name two main types of immunities.
Answer:
1. Innate immunity
2. Acquired immunity
2. Which Vitamin is known as the anti-infetive vitamin
3. Which Vitamin is used for ELISA test (AIDS)?
4. Which Vitamin contains Cobalt?
1. Swedish botanist Carolus Linnaeus established binomial nomenclature.
2. Caper Bauhin expressed proposed binomial nomenclature for the first time
3. In binomial nomenclature, the first word is a generic name having first letter capital and second word is a specific epithet having first letter. e.g. Homo sapiens, Mangifera indica
4. After end of biological name, the name of author is written in abbreviated form who gave the name to that organism.
5. Both the words of a biological name when handwritten are separately underlined and when printed are typed in italics to indicate their Latin origin and also give respect to the name.
CBSE Class 11 Biology - The Living World
Q1: Do five kingdom classification include viruses, viroids and lichens?
Answer: Five kingdom system of classification do not includes Virus, Viroids and Lichens.
Q2: What is a virus? What is its structure?
Answer: Viruses are non-cellular organisms having inert crystalline structure outside the living. A virus is a small particle consisting of a nucleic acid core surrounded by a protein coat; in order to reproduce, a virus must infect a living cell.
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| Honey Bee (credits: Sandeep Handa) |
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| Plasmolysis vs Flaccid vs Turgid Credits: Wikimedia, Author: LadyOfHats |
