Recent questions tagged botany

In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statements is true about archaea?

asked Jul 26, 2018 by pady_1

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Which one of the following is hetero-sporous?

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In which one of the following, male and female gametophytes do not have free-living independent existence?

asked Jul 26, 2018 by pady_1

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Consider the following four statements (1-4) about certain desert animals such as kangaroo-rat. (i) They have dark colour and high rate of reproduction and excrete solid urine (ii) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs (iii) They feed on dry seeds and do not required drinking water (iv) They excrete very concentrated urine and do not use water to regulate body temperature Out of these four, which two are correct-

asked Jul 26, 2018 by pady_1

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About 70% of total global carbon is found in:

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Select one of the following pairs of important features distinguishing Gnetum form Cycas and Pinus and showing affinities with angiosperms:

asked Jul 26, 2018 by pady_1

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Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?

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In the DNA molecule:

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Endosperm is consumed by developing embryo in the seed of:

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The fruit is chambered, developed from inferior ovary and has seeds with succulent testa in :

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Polysome is formed by:

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World Summit on Sustainable Development (2002) was held in:

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The two subunits of ribosome remain united at a critical ion level of :

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Which one of the following is the correct percentage of the two (out of the total of 4) greenhouse gases that contribute to the total global warming ?

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Which one of the following is not observed in biodiversity hotspots ?

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The length of different internodes in a culm of sugarcane is variable because of:

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Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in:

asked Jul 26, 2018 by pady_1

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Nitrogen fixation in root nodules of Alnus is brought about by:

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A transgenic food crop which may help in solving the problem of night-blindness in developing countries is:

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The slow rate of decomposition of fallen logs in nature is due to their:

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Consider the following statements concerning food chains: (i) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation (ii) Removal of most of the carnivores resulted in an increased population of deers (iii) The length of food chains is generally limited to 3-4 trophic levels due to energy loss (iv) The length of food chains may vary from 2 to 8 trophic levels

asked Jul 26, 2018 by pady_1

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In germinating seeds fatty acids are degraded exclusively in the:

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The $C_4$ plants are photosynthetically more efficient than $C_3$ plants because

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Haploids are more suitable for mutation studies than the diploids. This is because:

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Vascular tissues in flowering plants develop from:

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Quercus species are the dominant component in:

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Vacuole in a plant cell:

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Dry indehiscent single-seeded fruit formed from bicarpellary, syncarpous, inferior ovary is:

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Which one of the following is being tried in India as a biofuel substitute for fossil fuels?

asked Jul 26, 2018 by pady_1

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Thermococcus, Methanococcus and Methanobacterium exemplify:

asked Jul 26, 2018 by pady_1

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Consider the following four measures (1-4) that could be taken to successfully grow chickpea in an area where bacterial blight disease is common: (i) Spray with Bordeaux mixture (ii) Control of the insect vector of the disease pathogen (iii) Use of only disease-free seeds (iv) Use of varieties resistant to the disease Which two of the above measures can control the disease?

asked Jul 26, 2018 by pady_1

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The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of :

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The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that Adenosine Tri-Phosphate (ATP) is formed because:

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Unisexuality of flowers prevents:

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The Replum is present in the ovary of flower of:

asked Jul 26, 2018 by pady_1

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What is true about the isolated small tribal populations?

asked Jul 26, 2018 by pady_1

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In leaves of C-4 plants malic acid synthesis during $CO_2$ fixation occurs in:

asked Jul 26, 2018 by pady_1

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Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage? OPTION :

asked Jul 26, 2018 by pady_1

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Which one of the following statements is incorrect about menstruation?

asked Jul 26, 2018 by pady_1

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Ultrasound of how much frequency is beamed into human body for sonography ?

asked Jul 26, 2018 by pady_1

2 answers

Which one of the following pairs is mismatched ?

asked Jul 26, 2018 by pady_1

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Increased asthmatic attacks in certain seasons are related to:

asked Jul 26, 2018 by pady_1

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Bowman's glands are located in the

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A plant requires magnesium for:

asked Jul 26, 2018 by pady_1

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The two polynucleotide chain in DNA are:-

asked Jul 26, 2018 by pady_1

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The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show ?

asked Jul 26, 2018 by pady_1

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In cloning of cattle a fertilized egg is taken out of the mother's womb and:-

asked Jul 26, 2018 by pady_1

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Inheritance of skin colour in humans is an example of:-

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In the hexaploid wheat, the haploid(n) and basic(x) numbers of chromosomes are:

asked Jul 26, 2018 by pady_1

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The Okazaki fragments in DNA chain growth:-

asked Jul 26, 2018 by pady_1

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