What are filtration slits?

If the cells of the nucellus in the angiosperm ovule contain 24 chromosomes, what will be the number of chromosomes in the endosperm of a self-pollinated flower?

Type I (IDDM) hyperglycaemia is caused due to __________ .

Given below are two statements.
Statement I: Generally, anther in angiosperms are dithecous having two pollen sacs in each lobe.
Statement II: Each sporangium produces pollens from Sporogenous tissues by the process of sporogenesis.
In light of above statements, select the correct answer from the option given below.

Identify the INCORRECT statement regarding nuclein.

Free nuclear division means

Which one of the following pair is mismatched regarding their appearance in human evolution?

The mass and radius of the earth and moon are \(M_1, R_1\) and \(M_2, R_2\) respectively. Their centres are at a distance \(d\) apart. The minimum speed with which a body of mass \(m\) should be projected from a distance \(\left(\frac{2 d}{3}\right)\) from the centre of \(M_1\) so as to escape to \(\propto\) is

Natalite is a mixture of

Let \(\quad \overline{\mathrm{a}}=\alpha \hat{\mathrm{i}}+3 \hat{\mathrm{j}}-\hat{\mathrm{k}}, \quad \overline{\mathrm{b}}=3 \hat{\mathrm{i}}-\beta \hat{\mathrm{j}}+4 \hat{\mathrm{k}} \quad\) and \(\overline{\mathrm{c}}=\hat{\mathrm{i}}+2 \hat{\mathrm{j}}-2 \hat{\mathrm{k}}\), where \(\alpha, \beta \in \mathbb{R}\), be three vectors. If the projection at \(\overline{\mathrm{a}}\) on \(\overline{\mathrm{c}}\) is \(\frac{10}{3}\) and \(\overline{\mathrm{b}} \times \overline{\mathrm{c}}=-6 \hat{\mathrm{i}}+10 \hat{\mathrm{j}}+7 \hat{\mathrm{k}}\), then the value of \(\alpha^2+\beta^2-\alpha \beta\) is equal to

The eccentricity of the curve represented by \(x=3(\cos \mathrm{t}+\sin \mathrm{t})\), \(y=4(\cos t-\sin t)\) is

The value of \(\tan \left(\cos ^{-1}\left(\frac{4}{5}\right)+\tan ^{-1}\left(\frac{2}{3}\right)\right)\) is

A convex lens is dipped in a liquid whose refractive index is equal to refractive index of lens material. Then its focal length will