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    • Posted by Ruhani Arora 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 1 answers

    Gagan 💖 3 years, 1 month ago

    Hello Ruhi, Variation can be inherited and the variants formed by this are called germline variants. They are formed due the variation that occurred in the sperm or egg that resulted the variation. That variated gene 🧬 is also passed in progeny and there is also a chance of seeing the same in their next progeny (i.e. F2 progeny of the initial parents)

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    • Posted by Vipranshi Sharma 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 1 answers

    Ruhani Arora 3 years, 1 month ago

    Ichthyosaurs

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    • Posted by Ruhani Arora 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Sheetal Kumari 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 3 answers

    Kishor Jhorar 3 years ago

    1.Physical barrier like skin and mucos 2.physiological barrier like tear and acid in stomach 3.cellular barrier like lymphocytes and monocytes

    0Thank You

    Dilshad Ahmad 3 years ago

    Cellular barrier and cytokine barrier

    0Thank You

    Dhaliwal Bhupi 3 years, 1 month ago

    Saliva in mouth and hcl in stomach

    3Thank You

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    • Posted by Ruhani Arora 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 2 answers

    Madiha Siddiqui 3 years, 1 month ago

    A

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    Gaurav Yadav 3 years, 1 month ago

    A is true but r is false

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    • Posted by Account Deleted 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 1 answers

    Shanaya Rajput 3 years, 1 month ago

    Genetic code is the sequence of nucleotide in DNA and RNA that determines the amino acid sequence of proteins.

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    • Posted by Ruhani Arora 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 5 answers

    Preeti Dabral 3 years, 1 month ago

    Luteinizing hormone (LH): This hormone stimulates ovulation in women and testosterone production in men.

    7Thank You

    Kishor Jhorar 3 years ago

    Option (d)

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    Dhaliwal Bhupi 3 years, 1 month ago

    D

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    Divya. Kumari 3 years, 1 month ago

    Lutenising hormone

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    Vaidehi Singh Bhadoriya 3 years, 1 month ago

    LH

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    • Posted by Ruhani Arora 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 2 answers

    Dhaliwal Bhupi 3 years, 1 month ago

    D

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    Vaidehi Singh Bhadoriya 3 years, 1 month ago

    b) Maintenance of high concentration of hormones in blood stream

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    • Posted by Manish Singh 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 2 answers

    Akshit Dogra 2 years, 9 months ago

    The male accsory glands include des the pair of seminal vesicle and prostate gland them the last bulbourethral gland or cowpers gland * Seminal vesicle makes the 60% of the semen and do contains fructose(gives energy to sperms) , fibrinogen ( Create semen cogulated) inositol(contraction in female genital track)etc *Prostate gland holds 30% of the semen and adds calcium, phosphate, profibrinolysin and the citrate (gives acidic ph to semen ) * Cowpers gland It provides lubricant to *****.

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    Anjan Karthi 3 years, 1 month ago

    The various male accessory glands include the prostrate gland, the seminal vesicles and the bulbourethral (Cowper's) gland. The primary function of the accessory gland products is to facilitate sperm transfer to the female. The function of seminal vesicle is the production of the fluid that mixes with the sperm and makes up a significant percentage of semen. The prostate gland helps in the ejaculation of the sperm. Further, the bulbourethral gland provides nutrition and additional lubrication to the sperms.

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    • Posted by Janiz Jafica 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Satish Kumar 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 1 answers

    Anjan Karthi 3 years, 1 month ago

    It's a long tube connecting the buccal cavity (MOUTH) to the stomach. It's main characteristic feature is it's muscles (from outside) with peristaltic property. These ensure smooth movement of bolus (processed food from buccal cavity) to the stomach.

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    • Posted by Ruhani Arora 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 3 answers

    Dilshad Ahmad 3 years ago

    D

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    Vaidehi Singh Bhadoriya 3 years, 1 month ago

    Answer - d) because sporopollenin is absent on germ pores

    1Thank You

    Anjan Karthi 3 years, 1 month ago

    Correct option is C) Sporopollenin is a major component of the tough outer walls called as exines in plant pores and pollen grains. They are not specified to germ pore alone, but is the chemical which forms the overall structural component.

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    • Posted by Manish Singh 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 1 answers

    Bhumika Tyagi 3 years, 1 month ago

    The development of human development...is defined as very crucial

    3Thank You

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    • Posted by Ajitha Kumari 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Ruhani Arora 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 2 answers

    Anjan Karthi 3 years, 1 month ago

    Supposed to be both (b) and (c). Considering the case of anatropous ovules (that we are currently studying), the micropylar end of the embryo sac is found towards the bottom of the ovary and the chalazal pole is found towards the upper part of the ovary. In that case, the one at the top of the embryo sac will be the antipodals, followed by the central cell and finally the egg apparatus.

    1Thank You

    Ananth Krishna H 3 years, 1 month ago

    C

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    • Posted by Harsimran Kaura 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 1 answers

    Preeti Dabral 3 years, 1 month ago

    The secondary oocyte retains the bulk of the nutrient-rich cytoplasm of the primary oocyte because the secondary oocyte further develops into ovum that undergoes fertilization and formation of the zygote where the nutrition in bulk is required for healthy development and growth.

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    • Posted by Harsimran Kaura 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 1 answers

    Preeti Dabral 3 years, 1 month ago

    The secondary oocyte retains the bulk of the nutrient-rich cytoplasm of the primary oocyte because the secondary oocyte further develops into ovum that undergoes fertilization and formation of the zygote where the nutrition in bulk is required for healthy development and growth.

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    • Posted by Shivam Pandit 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 2 answers

    Preeti Dabral 3 years, 1 month ago

    The western part of Karnataka is included in the western ghats as a biodiversity spot. The state has over 20 famous wildlife sanctuaries for now.

    0Thank You

    Anjan Karthi 3 years, 1 month ago

    We need not learn about the world. If you wish to know about those in India, there are 448 wildlife sanctuaries.

    0Thank You

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    • Posted by Yaditi Nishad 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 1 answers

    Arifa Noor 3 years, 1 month ago

    Megaspores are produced by meiosis in megaspores mother cell

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    • Posted by Jishu Kumar 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 1 answers

    Tanisha Upadhayay 3 years, 1 month ago

    Sangamy and triple fission together constitute double fertilisation

    1Thank You

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    • Posted by Ruhani Arora 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 2 answers

    Sanjana Barik 3 years, 1 month ago

    D

    0Thank You

    Riya Joshi 3 years, 1 month ago

    A

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    • Posted by Ruhani Arora 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 3 answers

    Anjan Karthi 3 years, 1 month ago

    Well she is true. In wildlife safari parks, threatened species are conserved in a particular area, other than their natural habitat. People are permitted to visit these parks to see the animals and plants conserved there. It's ex - situ conservation and the answer lies there itself, ex-situ is wherein the species is conserved outside the habitat providing the necessary conditions it required in the habitat. So, wild animals do need the presence of trees and grasses and all that- or else, they may feel offended, right? And, plants are where animals are, too.

    0Thank You

    Ruhani Arora 3 years, 1 month ago

    I mean to ask it's for both or animals only? Coz in one video I studied that it's for both but I am little confused

    1Thank You

    Sneha Chaudhary 3 years, 1 month ago

    Ofcourse for animals

    1Thank You

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    • Posted by Qazim Khan 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 2 answers

    Tanisha Upadhayay 3 years, 1 month ago

    Release of oxitocin as per required

    0Thank You

    Tanisha Upadhayay 3 years, 1 month ago

    Production of oxitocin for parturation

    0Thank You

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    • Posted by Ruhani Arora 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 1 answers

    Sanjana Barik 3 years, 1 month ago

    Increase. Because, slope reflects dependency on Area therefore, more is the area more will be the species

    0Thank You

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    • Posted by Naveen Priya Naveen Priya 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Adarsh Kumar Tiwari 3 years, 1 month ago

    CBSE > Class 12 > Biology
    • 1 answers

    Anjan Karthi 3 years, 1 month ago

    As a result of the catabolic action of saprophytic microbes on fragmented detritus, dark, moist and amorphous matter known as humus gets accumulated over the soil layers. This material is composed of higher nutrient content than normal soil and makes nutrients available to plants in absorbable forms. Following are the three main characteristics of humus :- It binds the soil together, and prevent soil erosion. Humus content affects the color, texture, and structure of the soil. Soil with rich humus tends to be dark with a loamy texture.

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    • Posted by Ruhani Arora 3 years, 2 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Anjan Karthi 3 years, 2 months ago

    (c) Age pyramid. (Provides a graphical representation of the distribution of pre-reproductive, reproductive and post-reproductive individuals in the population. If the number of pre- reproductive individuals is more, the population is said to be a growing population. If the number of pre-reproductive and reproductive individuals are almost equal, the population is stabilised but not growing. If the number of pre-reproductive individuals is low, then the population is said to be declining.

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    • Posted by Ruhani Arora 3 years, 2 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Qazim Khan 3 years, 1 month ago

    False.

    0Thank You

    Anjan Karthi 3 years, 2 months ago

    False. (Exp = Majority of organisms can tolerate only a narrow range of salinity and these are called stenohaline organisms. The remaining organisms, which include halophiles and marshy microbes, can tolerate a good and wide range of salinity and these are called euryhaline organisms.)

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    • Posted by Ruhani Arora 3 years, 2 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Anjan Karthi 3 years, 2 months ago

    True. (Exp = Most freshwater organisms are stenohaline and are not much used to significantly wide ranges of salinities. Consequently, staying for long in the salty sea water can disturb the osmotic balance in their body, as a result of which they won't survive for much long.)

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    • Posted by Ruhani Arora 3 years, 2 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Anjan Karthi 3 years, 2 months ago

    The net nature of the interaction is what matters here. In predation and parasitism, it is always (+,-) where one organism makes benefit out of the other organism in a way that it causes harm or negatively affect the latter. So, net effect is negative, actually. The various types of positive interactions, therefore, would be mutualism and commensalism (mainly).

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