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Match the following structures in molluscs to their respective functions:

Column I Column II

1) Radula a) Blood pigment

2) Mantle layer b) Mastication

3) Foot c) Secretion of shell

4) Haemocyanin d) Locomotion

The
unit of length convenient on the nuclear scale is a fermi : 1 f = 10^–
15 m. Nuclear sizes obey roughly the
following empirical relation :

where
r
is the radius of the nucleus, A
its mass number, and r₀

is a constant equal to about, 1.2
f. Show that the rule implies that nuclear mass density is nearly
constant for different nuclei. Estimate the mass density of sodium
nucleus. Compare it with the average mass density of a sodium atom
obtained in Exercise. 2.27.

A group of individuals of different species, inhabiting a given area is called:

Choose the correct statement.

Which of the following tissues is not a type of loose connective tissue?

The shell in molluscs is secreted by

In biological processes, many derived sugars are formed by monosaccharides either by deoxygenation or reduction. An exemplar molecule is_____.

"Proteins are GLOBULAR " ( sandwich / lamellar theory )

What does globular mean ?

Which of these groups vary from amino acid to another?

The deficiencies of micronutrients not only affects the growth of the plants but also its vital functions, such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements will mostly affect, both photosynthetic and mitochondrial electron transport?

Children suffering from phenylketonuria are given food low in phenylalanine and supplemented with tyrosine. This is because they:

Small pox and rabies are caused by

Secondary meristems are produced in dicot

How do you
distinguish between a skeletal muscle and a cardiac muscle?

The primary and secondary oocytes are suspended in prophase I and metaphase II respectively due to secretions from the

What is the first structure in this respiratory sequence?

Select the correct set from the alternatives given below.

Earthworm has how many segments?

Which of the followings is macro element?

The human population follows

All these phenomena cause:

At which stage, the homologous chromosomes separate due to repulsion, but are held together by the chiasmata?

Sizes of two specimens of microbes are shown using block models. Size of specimen 1 is mm less than the size of specimen 2.

Erythroblastosis foetalis is caused when fertilization takes place between gametes of

Question 38

Match items of column A: with items of column B

$\begin{array}{cc}\text{Column A}& \text{Column B}\\ \left(a\right)\text{Naked seed}& \left(A\right)\text{Angiosperms}\\ \left(b\right)\text{Covered seed}& \left(B\right)\text{Gymnosperms}\\ \left(c\right)\text{Flagella}& \left(C\right)\text{Bryophytes}\\ \left(d\right)\text{Marchantia}& \left(D\right)\text{Euglena}\\ \left(e\right)\text{Marsilea}& \left(E\right)\text{Thallophyta}\\ \left(f\right)\text{Cladophora}& \left(F\right)\text{Pteridophyta}\\ \left(g\right)\text{Penicillium}& \left(G\right)\text{Fungi}\end{array}$

Which of the following is used for detecting viable pregnancy?

Product(s) of biotechnology is/are:

Which of the following venn diagrams represents the correct relationship between Mammalia, Vertebrata, and Reptilia?

The single cotyledon present in grass embryo is called _______.

Explain briefly, nicturition and disorders fo the excretory system.