In mice, black coat colour (allele B) is dominant to brown coat colour (allele b). The offspring of a cross between a black mouse (BB) and a brown mouse were allowed to interbreed. What percentage of the progeny would have black coats?
Anonymous Quiz
19%
(1) 25%
36%
(2) 50%
29%
(3) 75%
16%
(4) 100%
A dominant gametophytic phase alternating multicellular and dependent sporophytic phase is represented by:
Anonymous Quiz
37%
(1) Chlamydomonas
35%
(2) Polytrichum
23%
(3) Adiantum
5%
(4) Cedrus
In some plants, the female gamete develops into embryo without fertilisation. This phenomenon is known as
(💖NEET 2019💖)
(💖NEET 2019💖)
Anonymous Quiz
45%
(a) parthenogenesis
22%
(b) autogamy
26%
(c) parthenocarpy
8%
(d) syngamy.
Regarding to cilia and flagella which of the following statement is INCORRECT?
Anonymous Quiz
26%
(1) Flagella are comparatively longer than cilia and responsible for cell movement.
25%
(2) Cilia can move either cell or surrounding fluid
34%
(3) Flagella is responsible for movement of surrounding fluid
16%
(4) Cilia work like oars
Thiobacillus is a group of bacteria
helpful in carrying out
[NEET (National) 2019] (a) chemoautotrophic-fixation (b) nitrification (c) denitrification (d) nitrogen-fixation
helpful in carrying out
[NEET (National) 2019] (a) chemoautotrophic-fixation (b) nitrification (c) denitrification (d) nitrogen-fixation
Anonymous Quiz
23%
A
28%
B
30%
C
18%
D
During biological nitrogen fixation,
inactivation of nitrogenase by
oxygen poisoning is prevented by [CBSE AIPMT 2015] (a) leghaemoglobin (b) xanthophyll (c) carotene (d) cytochrome
inactivation of nitrogenase by
oxygen poisoning is prevented by [CBSE AIPMT 2015] (a) leghaemoglobin (b) xanthophyll (c) carotene (d) cytochrome
Anonymous Quiz
36%
A
32%
B
21%
C
11%
D
☆❤Some compounds❤☆
3. Hydrogen — H₂
5. Carbon Monoxide - CO
6. Sulfur Dioxide — SO₂
7. Nitrogen Dioxide - NO₂
8. Nitrogen monoxide (nitric oxide) - NO
9. Dinitrogen Oxide (Nitrous Oxide) - N₂O
10. Chlorine - Cl₂
11. Hydrogen chloride — HCl
12. Ammonia - NH₃
Acid
20. Calcium Hydroxide - Ca (OH) ₂
22. Carbonate Sodium — Na₂CO₃
25. Ammonium Sulfate - (NH₄) ₂SO₄
☆❤Commercial and Chemical Names of Common Chemicals❤☆
Business Name - IAPUC Name - Molecule Formula
27. Chalk - Calcium Carbonate - CaCO₃
Alcohol - Ethyl
34. T.N.T. - Tri Nitro Tallinn - C6H₂CH₃ (NO₂) ₃
35. Washing Soda - Sodium Carbonate - Na₂CO₃
36. Blue Thoth - Copper Sulphate - CuSO₄
37. Molar - Ammonium Chloride - NH₄Cl
38. Alum - Potassium aluminum sulfate - K₂SO₄Al₂ (SO₄) ₃.24H₂O
39. Quenched lime - calcium hydroxide - Ca (OH) ₂
40. Starch - Starch - C6H10O5
41. Laughing gas - nitrous oxide - N₂O
42. Red medicine - potassium permanganate - KMnO₄
43. Red vermilion - lead paraxide - Pb₃O₄
44. Dry Ice - Solid Carbon-D-Oxide - CO₂
45. Nitre - Potassium nitrate - KNO₃
46. Vinegar - dilute solution of acetic acid - CH₃COOH
47. Suhaga - Borax - Na₂B₄O7.10H₂O
48. spirit - methyl alcohol - CH₃OH
49. Slate - Silica Aluminum Oxide - Al₂O₃2SiO₂.2H₂O
50.Green Case - Ferric Sulphate - Fe₂(So4)3
3. Hydrogen — H₂
5. Carbon Monoxide - CO
6. Sulfur Dioxide — SO₂
7. Nitrogen Dioxide - NO₂
8. Nitrogen monoxide (nitric oxide) - NO
9. Dinitrogen Oxide (Nitrous Oxide) - N₂O
10. Chlorine - Cl₂
11. Hydrogen chloride — HCl
12. Ammonia - NH₃
Acid
20. Calcium Hydroxide - Ca (OH) ₂
22. Carbonate Sodium — Na₂CO₃
25. Ammonium Sulfate - (NH₄) ₂SO₄
☆❤Commercial and Chemical Names of Common Chemicals❤☆
Business Name - IAPUC Name - Molecule Formula
27. Chalk - Calcium Carbonate - CaCO₃
Alcohol - Ethyl
34. T.N.T. - Tri Nitro Tallinn - C6H₂CH₃ (NO₂) ₃
35. Washing Soda - Sodium Carbonate - Na₂CO₃
36. Blue Thoth - Copper Sulphate - CuSO₄
37. Molar - Ammonium Chloride - NH₄Cl
38. Alum - Potassium aluminum sulfate - K₂SO₄Al₂ (SO₄) ₃.24H₂O
39. Quenched lime - calcium hydroxide - Ca (OH) ₂
40. Starch - Starch - C6H10O5
41. Laughing gas - nitrous oxide - N₂O
42. Red medicine - potassium permanganate - KMnO₄
43. Red vermilion - lead paraxide - Pb₃O₄
44. Dry Ice - Solid Carbon-D-Oxide - CO₂
45. Nitre - Potassium nitrate - KNO₃
46. Vinegar - dilute solution of acetic acid - CH₃COOH
47. Suhaga - Borax - Na₂B₄O7.10H₂O
48. spirit - methyl alcohol - CH₃OH
49. Slate - Silica Aluminum Oxide - Al₂O₃2SiO₂.2H₂O
50.Green Case - Ferric Sulphate - Fe₂(So4)3
During mitosis ER, GB, nuclear membrane and nucleolus begin to disappear at
Anonymous Quiz
32%
(1) Late prophase
31%
(2) Early metaphase
21%
(3) Late metaphase
15%
(4) Early prophase
Which of the following is incorrect about birds?
Anonymous Quiz
21%
(1) Air sacs is connected to lungs which helps in respiration.
29%
(2) Hind limb possesses scales and are modified for walking, swimming or clasping.
33%
(3) Separate sexes, internal fertilization, oviparous and indirect development.
18%
(4) endoskeleton is fully ossified
The efficiency of a fuel cell is given
by [CBSE AIPMT 2007]
by [CBSE AIPMT 2007]
Anonymous Quiz
23%
(a) ∆G/∆S
51%
(b) ∆G/∆H
17%
(c) ∆S/∆G
8%
(d) ∆H/∆G
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📗📒SEXUAL REPRODUCTION📕📘
●Involves formation of male and female gamete by two individuals of the opposite sex.
●Offspring produced by fusion of male and female gametes not identical to each other or to the parents.
●All sexually reproducing organisms share a similar pattern of reproduction.
●In sexual reproduction, fusion of male and female gametes results in offspring that are not identical to parents.
🟦DIFFERENT PHASES IN SEXUAL REPRODUCTION🟦
★[A]★ 🔴JUVENILE PHASE 🔴
★The period between birth and sexual maturity is called juvenile phase.
★In plants it is known as vegetative phase.The end of juvenile/vegetative phase marks the beginning of the reproductive phase.
[B]🟣 REPRODUCTIVE PHASE 🟣
● Some plants show flowering in particular season and some other flowers in all seasons.
●Some other plants like bamboo species flowers once in life time (after 50-100 years),
●Strobilanthus kunthiana (neelakuranji), flowers once in 12 years.
●The female placental animals exhibit cyclic change in activities ovaries and accessary glands as well as hormone during the reproductive phase.
●Involves formation of male and female gamete by two individuals of the opposite sex.
●Offspring produced by fusion of male and female gametes not identical to each other or to the parents.
●All sexually reproducing organisms share a similar pattern of reproduction.
●In sexual reproduction, fusion of male and female gametes results in offspring that are not identical to parents.
🟦DIFFERENT PHASES IN SEXUAL REPRODUCTION🟦
★[A]★ 🔴JUVENILE PHASE 🔴
★The period between birth and sexual maturity is called juvenile phase.
★In plants it is known as vegetative phase.The end of juvenile/vegetative phase marks the beginning of the reproductive phase.
[B]🟣 REPRODUCTIVE PHASE 🟣
● Some plants show flowering in particular season and some other flowers in all seasons.
●Some other plants like bamboo species flowers once in life time (after 50-100 years),
●Strobilanthus kunthiana (neelakuranji), flowers once in 12 years.
●The female placental animals exhibit cyclic change in activities ovaries and accessary glands as well as hormone during the reproductive phase.
🟦GAMETE TRANSFER 🟦
●In majority of organisms, male gametes are motile and females
gametes are non-motile, except in fungi and algae in which both gametes are motile.
● In simple plants like algae, fungi, bryophytes and pteridophytes water is the medium through which male and female gametes moves.
●The number of male gametes are much more than number of female gametes as most of male gametes fail to reach the female gametes.
● In higher plants pollen grains are carrier of male gametes and ovule has eggs.
● Pollen grains must be transferred from anther to stigma to facilitate fertilisation.
● The transfer of pollen
grains from anther to stigma is called pollination.
★Pollination may be self (anther to stigma of same flower) or cross (anther to stigma of different flower).
★Pollen grains germinate on stigma to produce pollen tube that delivers the male gametes near the ovule.
■FERTILISATION ■– The fusion of male and female gamete is called fertilization or syngamy.
★It results in the formation of diploid zygote.
★The process of development of new organisms without fertilisation of female gametes is called parthenogenesis.
★ For example honey bee, rotifers, and lizards
●In majority of organisms, male gametes are motile and females
gametes are non-motile, except in fungi and algae in which both gametes are motile.
● In simple plants like algae, fungi, bryophytes and pteridophytes water is the medium through which male and female gametes moves.
●The number of male gametes are much more than number of female gametes as most of male gametes fail to reach the female gametes.
● In higher plants pollen grains are carrier of male gametes and ovule has eggs.
● Pollen grains must be transferred from anther to stigma to facilitate fertilisation.
● The transfer of pollen
grains from anther to stigma is called pollination.
★Pollination may be self (anther to stigma of same flower) or cross (anther to stigma of different flower).
★Pollen grains germinate on stigma to produce pollen tube that delivers the male gametes near the ovule.
■FERTILISATION ■– The fusion of male and female gamete is called fertilization or syngamy.
★It results in the formation of diploid zygote.
★The process of development of new organisms without fertilisation of female gametes is called parthenogenesis.
★ For example honey bee, rotifers, and lizards
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🔰 POPULATION INTERACTION 🔰
𝐈𝐧𝐭𝐞𝐫𝐚𝐜𝐭𝐢𝐨𝐧 𝐒𝐩𝐞𝐜𝐢𝐞𝐬 𝟏 𝐒𝐩𝐞𝐜𝐢𝐞𝐬 𝟐
●Mutualism + +
●Competition _ _
●Predation + _
●Parasitism + _
●Commensalism + 0
●Amensalism _ 0
𝐈𝐧𝐭𝐞𝐫𝐚𝐜𝐭𝐢𝐨𝐧 𝐒𝐩𝐞𝐜𝐢𝐞𝐬 𝟏 𝐒𝐩𝐞𝐜𝐢𝐞𝐬 𝟐
●Mutualism + +
●Competition _ _
●Predation + _
●Parasitism + _
●Commensalism + 0
●Amensalism _ 0
💚💚💚 VIVIPAROUS 💚💚💚
★Development of zygote takes place inside the body of organisms and produces young ones.
Ex- Human, dog, horse etc
★In flowering plants, zygote is formed inside the ovule.
■ After fertilisation, sepals, petals and stamens of flower fall off.
■ The zygote develops into embryo and ovules into seeds.
■ The ovary develops into fruits which develop a thick wall called pericarp protective in function.
■After dispersal, seeds germinate under favorable condition to produce new plants.
★Development of zygote takes place inside the body of organisms and produces young ones.
Ex- Human, dog, horse etc
★In flowering plants, zygote is formed inside the ovule.
■ After fertilisation, sepals, petals and stamens of flower fall off.
■ The zygote develops into embryo and ovules into seeds.
■ The ovary develops into fruits which develop a thick wall called pericarp protective in function.
■After dispersal, seeds germinate under favorable condition to produce new plants.
⚜ EMBRYOGENESIS ⚜
● the process of development of embryo from the zygote.
● During this, zygote undergoes mitotic division and cell differentiation.
● Cell division increase the number and cell differentiation help in formation of new group of cells and organs.
⚜ OVIPAROUS ⚜
★Development of zygote takes place outside the body of organisms and lay fertilized of unfertilized eggs.
Ex - Reptiles and birds
● the process of development of embryo from the zygote.
● During this, zygote undergoes mitotic division and cell differentiation.
● Cell division increase the number and cell differentiation help in formation of new group of cells and organs.
⚜ OVIPAROUS ⚜
★Development of zygote takes place outside the body of organisms and lay fertilized of unfertilized eggs.
Ex - Reptiles and birds
⚜ EMBRYOGENESIS ⚜
● the process of development of embryo from the zygote.
● During this, zygote undergoes mitotic division and cell differentiation.
● Cell division increase the number and cell differentiation help in formation of new group of cells and organs.
⚜ OVIPAROUS ⚜
★Development of zygote takes place outside the body of organisms and lay fertilized of unfertilized eggs.
Ex - Reptiles and birds
● the process of development of embryo from the zygote.
● During this, zygote undergoes mitotic division and cell differentiation.
● Cell division increase the number and cell differentiation help in formation of new group of cells and organs.
⚜ OVIPAROUS ⚜
★Development of zygote takes place outside the body of organisms and lay fertilized of unfertilized eggs.
Ex - Reptiles and birds