Maharashtra Board Class 10 Science 2 Sample Paper Set 6 with Answers

Maharashtra Board SSC Class 10 Science 2 Sample Paper Set 6 with Answers Solutions Pdf Download.

Maharashtra Board Class 10 Science 2 Model Paper Set 6 with Answers

Time: 2 Hours
Total Marks: 40

Note:

1. All questions are compulsory.
2. The numbers to the right of the questions indicate full marks.
3. Answer to every main question must start on a new page.
4. In case of MCQs (Q. No. 1(A)) only the first attempt will be evaluated and will be given credit.
5. For every MCQ, the correct alternative (A), (B), (C) or (D) with sub-question number is to be written as an answer.
   For Eg.: (i) (A), (ii) (B), (iii) (C) or (iv) (D)
6. Scientifically correct and labelled diagrams should be drawn wherever necessary.
7. Each answer must have correct question number and sub-question number.

Question 1.
Choose the correct alternative. [5]
i. Theory of inheritance of acquired characters is also known as (A)
(A) Lamarckism
(B) Natural selection
(C) Speciation
(D) Translocation
Answer:
(A) Lamarckism

ii. Which of the following is NOT a part of mitosis? (B)
(A) Anaphase
(B) Diplotene
(C) Prophase
(D) Cytokinesis
Answer:
(B) Diplotene

iii. During seed germination, _________ develops by using food stored in endosperm of the seed. (B)
(A) ovary
(B) zygote
(C) ovule
(D) radical
Answer:
(B) zygote

iv. Which of the following microbes is used to control soil pollution occurring due to acid rain? (C)
(A) Ideonella sakaiensis
(B) Alcanivorax borkumensis
(C) Acidithiobacillus ferroxidans
(D) Corynebacterium
Answer:
(C) Acidithiobacillus ferroxidans

v. Golden rice is an improved variety of rice developed for increased _________ content. (D)
(A) vitamin B
(B) amino acid
(C) protein
(D) vitamin A
Answer:
(D) vitamin A

(B) Answer the following. [5]
i. Find the odd one out.
Hydra, Nereis, Crab, Sea urchin
ii. Complete the chart:

iii. Match the columns.

Column I	Column II
a. Members of gynoecium	1. Carpels
b. Members of androecium	2. Stamens
	3. Petals

iv. Identify whether the given statement is right or wrong.
In telophase, the nucleolus reappears in each daughter nucleus and the spindle fibers disappear completely.
v. Complete the analogy.
RNA synthesis: _________ :: Protein synthesis: Translation
Answer:
i. Hydra
ii.

iii.

Column I	Column II
a. Members of gynoecium	1. Carpels
b. Members of androecium	2. Stamens

iv. Right
v. RNA synthesis : Transcription :: Protein synthesis : Translation

Question 2.
(A) Give scientific reasons. (Attempt any 2) [4]
i. Pollution control is extremely important.
ii. DNA fingerprinting is useful in forensic sciences and paternity testing.
iii. Sometimes, higher plants and animals too perform anaerobic respiration.
(B) Answer the following. (Attempt any 3) [6]
i. Write a short note based on the given diagram.

ii. a. Define applied microbiology.
b. Give any two examples of antibiotics obtained from various types of bacteria and fungi.
iii. Mention significance of any four methods used for transportation of patients.
iv. Write a short note on Chipko movement of Bishnoi.
v. Distinguish between butterfly and bat.
Answer:
(A) i. a. Pollution affects the life of human beings and other living organisms. Also, it affects other natural elements like air, soil, water, etc.
b. Persistence of pollutants in nature has adverse effects on human health and environment.
c. Anthropogenic activities like mining, etc., have negative impact on the ecosystem, biodiversity, natural resources and habitats.
d. Pollution leads to loss of biodiversity, global warming, reduction in number of plant and animal species, etc.
e. Human health is largely impacted by degradation of environment. Reduction in quality of air, water and other resources poses a threat to human life.
Hence, pollution control is extremely important.

ii. a. The DNA sequence pattern of every individual is unique as that of the fingerprints.
b. A person’s identity can be established with the help of a DNA sample.
c. At a crime scene, any source of DNA (blood, semen, etc.) found can be used to establish the identity of the criminal.
d. Also, paternity testing or the identity of a child’s father can be established using DNA fingerprinting.

iii. a. Respiration is an energy yielding process and takes place by the oxidation of foodstuffs.
b. Higher plants and animals require oxygen in order to respire aerobically.
c. However, in conditions where oxygen is depleted, these organisms perform anaerobic respiration to obtain energy.
d. Glucose is incompletely oxidized and a comparatively lesser amount of energy is obtained through anaerobic respiration.
Therefore, sometimes, higher plants and animals too perform anaerobic respiration.

(B)
i. a. ATP (Adenosine triphosphate) is an energy-rich molecule.
b. Energy is stored in the bonds that join phosphate groups in ATP.
c. ATP is stored in a cell as per the energy requirements of the cells.
d. As per the energy need, phosphate bonds of ATP are broken and energy is derived.
e. For these reasons, ATP is known as the energy currency of the cell.

ii. a. Applied microbiology is a branch of biology in which study of enzymes related to some prokaryotes and eukaryotic microbes, proteins, applied genetics, molecular biology, etc., is performed.
b. Penicillin, neomycin, cephalosporin, tetracyclines, streptomycin, erythromycin, etc.
[Any two examples]

iii. The different methods used for transportation of patients, vary depending on their condition. Some of these methods are as follows:
a. Cradle method: This method is useful for carrying children and under-weight victims.
b. Carrying piggy back: This method is useful for carrying an unconscious patient.
c. Human crutch method: This method is helpful for supporting a patient with one injured leg or those who require minimal assistance.
d. Pulling or lifting method: This method is useful for carrying an unconscious patient.
e. Two-hand chair method: This method is useful for helping patients who can hold their body upright but are unable to use their legs.
f. Four-hand chair method: This method is useful for helping patients who need support below their waist.
g. Stretcher: This method is useful for carrying an unconscious or a very badly injured person. One can use conventional stretcher if it is available. However, in case of an emergency, a temporary stretcher can be made using bamboos, blanket, etc.
[Any four methods]

iv. a. In 1731, Amrita Devi Bishnoi along with other 363 Bishnois sacrificed their lives for the protection of ’Khejri’ trees in Khejarli village near Jodhpur in Rajasthan. These trees were being harmed for construction of a new palace.
b. Bishnois were dependent on various forest products for their survival.
c. Amrita Devi and other Bishnois showed courage by embracing the trees to protect them.
d. The Government of India has recently instituted ’Amrita Devi Bishnoi National Award’ for protection of wildlife.

v.

Butterfly	Bat
a. It belongs to phylum Arthropoda.	It belongs to phylum Chordata.
b. It has jointed appendages.	It does not have jointed appendages.
c. It has four wings for flying.	It has patagium that functions as a wing.
d. Body is divisible into head, thorax and abdomen.	Body is divisible into head, neck, trunk and tail.
e. Exoskeleton is chitinous.	Exoskeleton is in the form of hairs.

[Any four points]

Question 3.
Answer the following. (Attempt any 5) [15]
i. Explain asexual reproduction in plants.
ii. Observe the food chain and answer the questions given below.

a. Identify the primary consumer in the given food chain.
b. Which of the organisms in the given food chain decompose dead organic matter?
c. Which of the given organisms is a tertiary consumer?
iii. a. Give two examples of diseases endangering the social health.
b. How will you help maintain good atmosphere in a home having chronically ill old person?
iv. Identify the type of disaster.
a. Terrorism
b. Hepatitis
c. Famine
v. To which class/phylum do the following organisms belong? Give one example of these phyla.
a. We have spindle-shaped body to minimize air resistance.
b. My body is radially symmetrical. Water vascular system is present in my body. I am referred as fish though I am not. What is my name?
c. My body is divisible into head, foot and visceral mass. I have a hard-calcareous shell externally or internally.
vi. Do you think it is necessary to ban the use of plastic bags? Explain why.
vii. a. What is biotechnology?
b. Define vaccine.
c. Mention any two products produced through biotechnology do you use in your daily life.
viii. What will you do in the following situations? Why?
a. Your friend has developed the hobby of snapping selfies.
b. You are spending more time in internet / mobile games, phone, etc.
c. You have to use free space around your home for good purpose.
Answer:
i. a. Vegetative reproduction is a type of asexual reproduction in plants, where new plants are produced from the vegetative parts like roots, stems, leaves and buds.
b. All plants produced by vegetative propagation are similar to the parent, as they are produced from a single parent.
c. This process can be observed in potato where new plants develop from eyes (bud on potato) or Bryophyllum which reproduces from buds on the leaf margin. Sugarcane and grasses also reproduce by buds present on nodes. Carrot and radish perform vegetative reproduction with the help of roots.

ii. a. Grasshopper is the primary consumers as it feeds on grass (autotroph).
b. Decomposers like fungi and bacteria decompose organic matter from dead plants and animals.
c. In the given food chain, snake is the tertiary consumer.

iii. a. 1. AIDS
2. T.B.
3. Leprosy
[Any two examples]
b. In order to maintain good atmosphere in a home having chronically ill old person one can do the following things:
1. Increase communication among the members of the family so as to keep everyone connected.
2. Take care that the needs of other members of the house are not neglected while dealing with the chronically ill old person.
3. Help by doing small chores like bringing medicines, etc.

iv. a. Terrorism: Intentional, man-made disaster
b. Hepatitis: Biological disaster caused by viruses
c. Famine: Dry famine or drought is a type of atmospheric, geophysical disaster

v. a. Class Aves
Peacock, penguin, parrot, pigeon, duck, etc. [Any one example]
b. Phylum Echinodermata
Starfish, sea urchin, brittle star, sea cucumber, etc. [Any one example]
c. Phylum Mollusca
Bivalve, snail, octopus, etc. [Any one example]

vi. Yes, it is necessary to ban the use of plastic bags because:
a. Plastic bags are non-biodegradable.
b. They can cause land and water pollution as they remain in the environment for a very long time.
c. Animals may die after eating plastic bags, due to choking.
d. Plastic bags can also clog drains and thereby cause problems in the sewage system. This may also cause problems of flooding due to heavy rainfall in cities.
e. Marine animals are affected adversely, as plastic bags block sunlight or can be hazardous to the life of the animal if ingested.

vii. a. The technique of bringing about improvements in living organisms by genetic modifications and hybridization, for the welfare of human beings is called ‘Biotechnology’.
b. Vaccines are killed / inactivated form of pathogens (antigen) is introduced into the body to induce immune response against a specific pathogen or disease.
c. Some products produced through biotechnology used in daily life are as follows:

1. Agricultural produce like rice, wheat, cotton, etc., grown using hybrid seeds, tissue culture or genetic modification.
2. Animal products like wool, milk, meat, etc., that are produced by improved breeds of animals.
3. Biotechnological products like vaccines, insulin, antibiotics, interferons are used to treat diseases, whereas, other biotechnological techniques can be used for early diagnosis of diseases.
4. Industrial products like alcohol produced by fermentation of sugar molasses by transgenic yeast.
5. Food items such as bread, idli, cheese, wine, beer, yoghurt and vinegar are produced using microbial biotechnology.
6. Milk and milk products manufactured as a part of the white revolution by employing biotechnology.
7. Fish and fishery products reared on a large-scale using biotechnology.
   [Any two products]

viii. a. The bad habit of constantly taking selfies may endanger the life of a person as he is unaware of the risks in his surroundings. If I find that my friend has developed the hobby of snapping selfies:

1. I will warn him to be careful while clicking selfies and to be aware about the surroundings so as to avoid accidents.
2. I will try to persuade him to avoid clicking selfies at every occasion and to rather enjoy the moment with friends and / or family.

b. If I start spending more time on internet / mobile games, phone, etc. I would follow the below given steps:

1. Designating activities during which the usage of internet or mobile phones should be strictly avoided. For example during meals, while studying, etc.
2. Talking to family members or friends when I feel lonely instead of using internet or mobile phones. This will reduce the habit of using mobile phones during idle time.
3. Develop hobbies like reading books, writing diary, collecting various materials, drawing, singing, listening to music, etc

c. I will use the free space around my home in the following manner:

1. I will grow small plants and shrubs, which will beautify the surroundings and also help in reducing the carbon dioxide levels.
2. I can also make the space available for parking of public vehicles or starting a small playground, library, etc.

Question 4.
Answer the following. (Attempt any 1) [5]
i. Make a concept map and explain menstrual cycle in detail.
ii. Draw schematic of power plant based on natural gas and answer the following questions:
a. At which place natural gas power plant is situated in Maharashtra?
b. How is pollution reduced in natural gas based power plant?
c. Give two examples of eco-friendly electricity process.
Answer:
i. Concept map of menstrual cycle:

a. Period of menstruation:
1. If ovum is not fertilized, the tissues of degenerating endometrium along with unfertilized ovum and blood are discarded through vagina.
2. During this period, bleeding continues for 4-5 days. This is known as menstruation.
b. Period of regeneration of endometrium:
1. In this phase the endometrium starts regenerating.
2. This phase extends from 5th to 13th day of menstrual cycle.
c. Ovulation phase:
1. Rupturing of follicle and release of oocyte is called as ovulation.
2. Ovulation generally occurs on 14th day of the menstrual cycle.
d. Period of secretion from glands in endometrium:
1. This phase extends from 15th to 28th day of the menstrual cycle. The ruptured follicle develops into a yellow body called corpus luteum.
2. Corpus luteum formed in the ovary secretes progesterone.

ii.

a. Natural gas power plant is situated in Anjavel in Maharashtra.
b. As natural gas does not contain sulphur, burning of natural gas results in less pollution.
c. Electricity generation from wind and sunlight are two examples of eco-friendly electricity process.

SSC Maharashtra Board Science 2 Question Paper with Solutions