Classify and describe epithelial tissue based
Question: Classify and describe epithelial tissue based on structural modifications of cells. Solution: Epithelial cells are divided into two broad categories based on structural modification of the cells: (A) Simple Epithelium and (B) Compound (Stratified) Epithelium Simple Epithelium: It is the epithelium tissue which has a single layer of the cell. It is further divided into three: Squamous cells, cuboidal cells and columnar epithelium. Compound (stratified) Epithelium: It is the epithelium t...
Read More →Differentiate the following functions:
Question: Differentiate the following functions: (i) $x^{-3}$ (ii) $\sqrt[3]{\mathrm{x}}$ Solution: (i) $x^{-3}$ $\frac{d}{d x} x^{n}=n x^{n-1}$ Differentiating w.r.t $x$, $\frac{d}{d x} x^{-3}=-3 x^{-3-1}$ $=-3 x^{-4}$ (ii) $\sqrt[3]{\mathrm{x}}=\mathrm{x}^{\frac{1}{3}}$ Formula:- $\frac{d}{d x} x^{n}=n x^{n-1}$ Differentiating w.r.t $\mathrm{x}$, $\frac{d}{d x} X \frac{1}{3}=\frac{1}{3} X \frac{1}{3}-1$ $=\frac{1}{3} x^{-\frac{2}{3}}$...
Read More →What is special about tissue
Question: What is special about tissue present in the heart? Solution: Cardiac muscle tissue is an extremely specialized tissue which is only found in the heart. It has similar characteristics of skeletal as well as smooth muscles. It can sustain contraction and relaxation rapidly. They are involuntary....
Read More →If the solve the problem
Question: If $f^{\prime}(x)=x+b, f(1)=5, f(2)=13$, find $f(x)$. Solution: Given $f^{\prime}(x)=x+b, f(1)=5$ and $f(2)=13$ On integrating the given equation, we have $\int \mathrm{f}^{\prime}(\mathrm{x}) \mathrm{dx}=\int(\mathrm{x}+\mathrm{b}) \mathrm{dx}$ We know $\int \mathrm{f}^{\prime}(\mathrm{x}) \mathrm{dx}=\mathrm{f}(\mathrm{x})$ $\Rightarrow \mathrm{f}(\mathrm{x})=\int(\mathrm{x}+\mathrm{b}) \mathrm{d} \mathrm{x}$ $\Rightarrow \mathrm{f}(\mathrm{x})=\int \mathrm{x} \mathrm{dx}+\int \mathr...
Read More →Using appropriate examples,
Question: Using appropriate examples, differentiate between false and true body segmentation. Solution: 1. False or pseudo body segmentation is the segmentation of the ectoderm. For example: In tapeworms, it shows external segmentation but it does not have internal segmentation. 2. True body segmentation is the series of repetition of a body part. It shows external segmentation as well as internal segmentation. For example, It is observed in arthropods like earthworms....
Read More →Write the appropriate type of tissues in column
Question: Write the appropriate type of tissues in column B according to the functions mentioned in column A. Solution: a. Secretion and absorption i.Cuboidal epithelium. b. Protective covering ii.Stratified epithelium. c. Linking and supporting framework iii. Connective tissue....
Read More →Write the functions in brief in column B,
Question: Write the functions in brief in column B, appropriate to the structures given in column A. Solution: a. Nictitating membrane i. It is the third eyelid present in frogs which protects the frog from water and land environment b. Tympanum ii. It is present behind the eyes of a frog. It helps in transmitting soundwaves to the inner part of the ear in frogs. c. Copulatory pad iii. The male frogs have a copulatory pad on the forelimbs which help in holding the female tightly during mating....
Read More →Frog is a poikilotherm, exhibits camouflage
Question: Frog is a poikilotherm, exhibits camouflage and undergoes aestivation and hibernation, how are all these benefits to it? Solution: During hibernation and aestivation, it sleeps and uses the stored energy in the body and emerges after the harsh environmental temperature has passed. Camouflage helps in the frogs protection and catching prey....
Read More →Mention special features of an eye in Cockroach.
Question: Mention special features of an eye in Cockroach. Solution: 1. They have compound eyes that contain numerous small visual units 2. Ommatidia is known as the visual unit in their eye 3. Their eyes have a lower resolution but higher sensitivity...
Read More →Complete the following statement :
Question: Complete the following statement : a. In cockroach grinding of food particle is performed by ____________ b. Malpighian tubules help in removal of ___________________________ c. Hind gut of cockroach is differentiated into ______________________ d. In cockroach blood vessels open into spaces called ___________ Solution: a. In cockroach grinding of food particle is performed by gizzard. b. Malpighian tubules help in removal of Nitrogenous excretory products. c. The hindgut of cockroach ...
Read More →The common name of some animals are given in Column A,
Question: The common name of some animals are given in Column A, write their scientific name in Column B. Solution: a. Tiger Panthera tigris. b. Peacock Pavocristatus. c. Housefly Musca domestica....
Read More →If the solve the problem
Question: If $f^{\prime}(x)=x-\frac{1}{x^{2}}$ and $f(1)=\frac{1}{2}$, find $f(x)$ Solution: Given $\mathrm{f}^{\prime}(\mathrm{x})=\mathrm{x}-\frac{1}{\mathrm{x}^{2}}$ and $\mathrm{f}(1)=\frac{1}{2}$ On integrating the given equation, we have $\int f^{\prime}(x) d x=\int\left(x-\frac{1}{x^{2}}\right) d x$ We know $\int \mathrm{f}^{\prime}(\mathrm{x}) \mathrm{dx}=\mathrm{f}(\mathrm{x})$ $\Rightarrow \mathrm{f}(\mathrm{x})=\int\left(\mathrm{x}-\frac{1}{\mathrm{x}^{2}}\right) \mathrm{d} \mathrm{x}...
Read More →Why nephridia in earthworm that are similar
Question: Why nephridia in earthworm that are similar in structure classified into three types? Mention the names of each. Solution: Nephridia in earthworms are similar in structure they are classified into different types based on their location. 1. Septal Nephridia: It is located in both sides of the intersegmental septa from the 15th segment till the end 2. Pharyngeal Nephridia: It is located in the 4th, 5th and 6th segment of the earthworm. 3. Integumentary Nephridia: It is located in the bo...
Read More →Correct the wrong statements among the following:
Question: Correct the wrong statements among the following: a. In earthworm, a single male genital pore is present. b. Setae help in locomotion of earthworm. c. Muscular layer in the body wall of an earthworm is made up of only circular muscles. d. Typhlosole is the part of the intestine of earthworm. Solution: a. Wrong statement. In earthworms, there is the presence of a pair of the male genital pore. b. Correct statement c. Wrong statement The muscular layer in the body wall of the earthworm i...
Read More →Find the value
Question: Let $f(x)= \begin{cases}\frac{k \cos x}{\pi-2 x}, x \neq \frac{\pi}{2} \\ 3, x=\frac{\pi}{2}\end{cases}$ If $\lim _{x \rightarrow \frac{\pi}{2}} f(x)=f\left(\frac{\pi}{2}\right)$, find the value of $k$. Solution: $\lim _{x \rightarrow \frac{\pi}{2}} f(x)=\lim _{x \rightarrow \frac{\pi}{2}} \frac{k \cos x}{\pi-2 x}$ Let $h=x-\frac{\pi}{2}$ $\rightarrow \mathrm{x}=\mathrm{h}+\frac{\pi}{2}$ $\mathrm{x} \rightarrow \frac{\pi}{2}$ or, $\mathrm{h}+\frac{\pi}{2} \rightarrow \frac{\pi}{2}$ or,...
Read More →How do you distinguish between dorsal
Question: How do you distinguish between dorsal and ventral surface of the body of earthworm? Solution: The dorsal surface of the body of earthworm has a dark dorsal median line than the ventral surface of the body of earthworm....
Read More →Why earthworm is called
Question: Why earthworm is called the friend of a farmer? Solution: The earthworm is called a friend of farmers because they help farmers by moving through the soil which helps in aeration of the soil. The excreta which is released by them helps in increasing the fertility of the soil....
Read More →Why are neurons called excitable cells?
Question: Why are neurons called excitable cells? Mention special features of the membrane of the neuron? Solution: Neurons are called excitable cells because they have an electrical potential difference 1. During the resting stage of the neuron, it has a sodium-potassium ion pump (i.e., Na+- K+ ion pump). 2. A change in the potential difference spread changes in the entire neuron 3. Stimulus in normally obtained in a place known as trigger zone in which sodium ions (i.e., Na+ ions) are abundant...
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int\left\{3 \sin x-4 \cos x+\frac{5}{\cos ^{2} x}-\frac{6}{\sin ^{2} x}+\tan ^{2} x-\cot ^{2} x\right\} d x$ Solution: Let $I=\int\left\{3 \sin x-4 \cos x+\frac{5}{\cos ^{2} x}-\frac{6}{\sin ^{2} x}+\tan ^{2} x-\cot ^{2} x\right\} d x$ $\Rightarrow I=\int\left\{3 \sin x-4 \cos x+5 \sec ^{2} x-6 \operatorname{cosec}^{2} x+\tan ^{2} x-\cot ^{2} x\right\} d x$ We have $\sec ^{2} \theta-\tan ^{2} \theta=\operatorname{cosec}^{2} \theta-\cot ^{2} \theta=1$...
Read More →Why are blood, bone and cartilage
Question: Why are blood, bone and cartilage called connective tissue? Solution: They have a role in the binding and connection of different tissues and organs. They help in providing structural rigidity, support and protection of the body. They help in the transport and exchange of various enzymes, hormones, gases and molecules such as nitrogenous wastes, vitamins, etc....
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int\left\{3 \sin x-4 \cos x+\frac{5}{\cos ^{2} x}-\frac{6}{\sin ^{2} x}+\tan ^{2} x-\cot ^{2} x\right\} d x$ Solution: Let $I=\int\left\{3 \sin x-4 \cos x+\frac{5}{\cos ^{2} x}-\frac{6}{\sin ^{2} x}+\tan ^{2} x-\cot ^{2} x\right\} d x$ $\Rightarrow I=\int\left\{3 \sin x-4 \cos x+5 \sec ^{2} x-6 \operatorname{cosec}^{2} x+\tan ^{2} x-\cot ^{2} x\right\} d x$ We have $\sec ^{2} \theta-\tan ^{2} \theta=\operatorname{cosec}^{2} \theta-\cot ^{2} \theta=1$...
Read More →Solve this
Question: Show that $\lim _{x \rightarrow 0} \frac{x}{|x|}$ does not exist. Solution: Left Hand Limit(L.H.L.): $\lim _{x \rightarrow 0^{-}} f(x)=\lim _{x \rightarrow 0^{-}} \frac{x}{|x|}$ $=\lim _{x \rightarrow 0^{-}} \frac{x}{(-x)}$ $=\lim _{x \rightarrow 0^{-}}-1$ $=-1$ Right Hand Limit(R.H.L.): $\lim _{x \rightarrow 0^{+}} f(x)=\lim _{x \rightarrow 0^{+}} \frac{x}{|x|}$ $=\lim _{x \rightarrow 0^{+}} \frac{x}{(x)}$ $=\lim _{x \rightarrow 0^{+}} 1$ $=1$ Since $\lim _{x \rightarrow 0^{-}} f(x) \...
Read More →How does a gap junction facilitate intercellular
Question: How does a gap junction facilitate intercellular communication? Solution: It occurs by the communication between two cells bypassing of small signalling molecules from one cytoplasm to adjacent cytoplasm....
Read More →Stratified epithelial cells have a limited
Question: Stratified epithelial cells have a limited role in secretion. Justify their role in our skin. Solution: Stratified epithelial cells help in the protection of the dry skin. It has multi-layers and thus does not have much role in secretion....
Read More →Structural organisation in animals attains different
Question: Structural organisation in animals attains different levels as cell organ organ system. What is missing in this chain? Mention the significance of such an organisation. Solution: the issue is missing in the given chain. It should be cell tissue organ organ system. A tissue is a collection of similar types of cells which together forms an organ and these organs form an organ system....
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