Yellowish edges appear in leaves
Question: deficient in __________________ mineral . Solution: Yellowish edges appear in leaves deficient in Nitrogen, Magnesium, Potassium and iron....
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int \frac{a}{b+c e^{x}} d x$ Solution: First of all take $e^{x}$ common from denominator so we get $\Rightarrow \int \frac{a}{e^{x}\left(\frac{b}{e^{x}}+c\right)} \cdot d x$ $\Rightarrow \int \frac{a \cdot e^{-x}}{b e^{-x}+c} d x$ Assume be $^{-x}+c=t$ $d\left(b e^{-x}+c\right)=d t$ $\Rightarrow-\mathrm{be}^{-\mathrm{x}} \mathrm{dx}=\mathrm{dt}$ $\Rightarrow \mathrm{e}^{-\mathrm{x}} \mathrm{dx}=\frac{-\mathrm{dt}}{\mathrm{b}}$ Substituting $t$ and dt...
Read More →Plants with zinc deficiency show reduced
Question: Plants with zinc deficiency show reduced biosynthesis of _______________. Solution: Plants with zinc deficiency show reduced biosynthesis of Auxin (IAA)....
Read More →What is common to Nepenthes,
Question: What is common to Nepenthes, Utricularia and Drosera with regard to the mode of nutrition? Solution: These plants trap insects and feed on them to get nutrition....
Read More →What is the function of leghaemoglobin
Question: What is the function of leghaemoglobin in the root nodule of a legume? Solution: Leghaemoglobin is a red coloured pigment present in the root nodules of a legume. It is also considered as oxygen molecule scavenger...
Read More →A farmer adds Azotobacter culture to the soil before sowing maize.
Question: A farmer adds Azotobacter culture to the soil before sowing maize. Which mineral element is being replenished? Solution: Azotobacter is nitrogen-fixing bacteria in cereal crops like maize. Which means it converts free nitrogen in the air to ammonia (NH3) or other related nitrogenous compounds....
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int \frac{1-\sin x}{x+\cos x} d x$ Solution: Assume $x+\cos x=t$ $d(x+\cos x)=d t$ $\Rightarrow 1-\sin x d x=d t$ Put $\mathrm{t}$ and dt in given equation we get $\Rightarrow \int \frac{d t}{t}$ $=\ln |t|+c$ But $t=x+\cos x$ $=\ln |x+\cos x|+c$...
Read More →Name an insectivorous angiosperm.
Question: Name an insectivorous angiosperm. Solution: Utricularia (Bladderwort) is an insectivorous angiosperm....
Read More →Name a plant which lacks chlorophyll.
Question: Name a plant which lacks chlorophyll. How will it obtain nutrition? Solution: A plant called Cuscuta is a stem parasite which does not have chlorophyll. They obtain nutrition from the host plant....
Read More →Carnivorous plants like Nepenthes and Venus
Question: Carnivorous plants like Nepenthes and Venus flytrap have nutritional adaptations. Which nutrient do they especially obtain and from where? Solution: Carnivorous plants like Nepenthes and Venus flytrap grow in nitrogen-deficient soil which causes them to have a nitrogen deficiency. Nitrogen is obtained by trapping an insect in their cavity...
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int \frac{\cos x}{2+3 \sin x} d x$ Solution: Assume $2+3 \sin x=t$ $d(2+3 \sin x)=d t$ $3 \cos x d x=d t$ $\cos x d x=\frac{d t}{3}$ Put $t$ and dt in given equation we get $\Rightarrow \frac{1}{3} \int \frac{\mathrm{dt}}{\mathrm{t}}$ $=\frac{1}{3} \ln |\mathrm{t}|+\mathrm{c}$ But $t=2+3 \sin x$ $=\frac{1}{3} \ln |2+3 \sin x|+c$...
Read More →Nitrogen fixation is shown by prokaryotes
Question: Nitrogen fixation is shown by prokaryotes and not by eukaryotes. Comment. Solution: Nitrogen fixation is the process in which the atmospheric nitrogen is converted to ammonia (NH3) in the presence of an enzyme Nitrogenase. This process is in prokaryotes due to the presence of nitrogenase....
Read More →Mycorrhiza is a mutualistic association.
Question: Mycorrhiza is a mutualistic association. How do the organisms involved in this association benefit from each other? Solution: Fungi get carbohydrates from the plant for its growth. The fungi, in turn, acts as the extension of root hairs and helps in increased absorption of the mineral and nutrients from the soil....
Read More →Name a plant, which accumulates silicon.
Question: Name a plant, which accumulates silicon. Solution: Oryza Sativa (Asian Rice) is one such plant which accumulates silicon....
Read More →Plants can be grown in (Tick the incorrect option)
Question: Plants can be grown in (Tick the incorrect option) a. soil with essential nutrients. b. water with essential nutrients. c. either water or soil with essential nutrients. d. water or soil without essential nutrients Solution: Option (d)water or soil without essential nutrients is the answer....
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int \frac{\sin 2 x}{a \cos ^{2} x+b \sin ^{2} x} d x$ Solution: Assume $a \cos ^{2} x+b \sin ^{2} x=t$ $d\left(a \cos ^{2} x+b \sin ^{2} x\right)=d t$ $(-2 a \cos x \cdot \sin x+2 b \sin x \cdot \cos x) d x=d t$ $(b \sin 2 x-a \sin 2 x) d x=d t$ $(b-a) \sin 2 x d x=d t$ $\sin 2 x d x=\frac{d t}{(b-a)}$ Put $\mathrm{t}$ and $\mathrm{dt}$ in given equation we get $\Rightarrow \frac{1}{(b-a)} \int \frac{d t}{t}$ $=\frac{1}{\mathrm{~b}-\mathrm{a}} \ln |\...
Read More →Match the element with its associated functions/roles
Question: Match the element with its associated functions/roles and choose the the correct option among given below Options a. A-i, B-ii, C-iii, D-iv, E-v b. A-iv, B-i, C-iii, D-ii, E-v c. A-iii, B-ii, C-iv, D-v, E-i d. A-ii, B-iii, C-v, D-i, E-iv Solution: Option (b)A-iv, B-i, C-iii, D-ii, E-v is the answer....
Read More →Differentiate:
Question: Differentiate: $e^{x} \cot x$ Solution: To find: Differentiation of $e^{x} \cot x$ Formula used: (i) (uv) $^{\prime}=u^{\prime} v+u v^{\prime}$ (Leibnitz or product rule) (ii) $\frac{d e^{x}}{d x}=e^{x}$ (iii) $\frac{d \cot x}{d x}=-\operatorname{cosec}^{2} x$ Let us take $u=e^{x}$ and $v=\cot x$ $u^{\prime}=\frac{d u}{d x}=\frac{d e^{x}}{d x}=e^{x}$ $v^{\prime}=\frac{d v}{d x}=\frac{d \cot x}{d x}=-\operatorname{cosec}^{2} x$ Putting the above obtained values in the formula:- $(u v)^{...
Read More →With regard to the Biological Nitrogen Fixation
Question: With regard to the Biological Nitrogen Fixation by Rhizobium in association with soybean, which one of the following statement/ statements do not hold. a. Nitrogenase may require oxygen for its functioning. b. Nitrogenase is MO- Fe protein c. Leg-hemoglobin is a pink coloured pigment. d. Nitrogenase helps to convert N2 gas into two molecules of ammonia. Solution: Option (a)Nitrogenase may require oxygen for its functioning is the answer....
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals $\int \frac{1}{x \log x} d x$ Solution: Assume $\log x=t$ $\mathrm{d}(\log x)=\mathrm{dt}$ $\frac{1}{x} d x=d t$ Put $\mathrm{t}$ and $\mathrm{dt}$ in given equation we get $\Rightarrow \int \frac{d t}{t}$ $=\ln |\mathrm{t}|+\mathrm{c}$ But $t=\log x$ $=\ln |\log x|+c$...
Read More →The reaction carried out by N2 fixing microbes include
Question: The reaction carried out by N2 fixing microbes include a. 2NH3 + 3O2 2NO2 + 2H+ + 2H2O (i) b. 2NO2- + O2 2NO3-(ii) Which of the following statements about these equations is not true a. step (i) is carried out by Nitrosomonas or Nitrococcus b. step (ii) is carried out by Nitrobacter c. both steps (i) and (ii) can be called nitrification d. bacteria carrying out these steps are usually photoautotrophs Solution: Option (d)bacteria carrying out these steps are usually photoautotrophs is t...
Read More →Which one of the following symptoms
Question: Which one of the following symptoms is not due to manganese toxicity in plants? a. Calcium translocation in shoot apex is inhibitedb. b. Deficiency in both Iron and Nitrogen is induced c. The appearance of brown spot surrounded by chlorotic veins d. None of the above Solution: Option (b) is the answer....
Read More →Deficiency symptoms of an element tend
Question: Deficiency symptoms of an element tend to appear first in young leaves. It indicates that the element is relatively immobile. Which one of the following elemental deficiency would show such symptoms? a. sulphur b. magnesium c. nitrogen d. potassium Solution: Option (a)sulphuris the answer....
Read More →Which one of the following statements
Question: Which one of the following statements can best explain the term critical concentration of an essential element? a. essential element concentration below which plant growth is retarded. b. essential element concentration below which plant growth becomes stunted. c. essential element concentration above which plant remains in the vegetative phase. d. none of the above Solution: Option (a)essential element concentration below which plant growth is retarded. is the answer....
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int \frac{e^{x}+1}{e^{x}+x} d x$ Solution: Assume $e^{x}+x=t$ $d\left(e^{x}+x\right)=d t$ $e^{x}+1=d t$ Put $\mathrm{t}$ and dt in given equation we get $\Rightarrow \int \frac{\mathrm{d} t}{t}$ $=\ln |t|+c$ But $t=e^{x}+x$ $=\ln \left|e^{x}+1\right|+c$...
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