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Which of these is the sum of the other three?

In acquired immunity:

Two long parallel straight wires, each carrying a current I are separated by a distance r. If the currents are in opposite directions, then the strength of the magnetic field at any point midway between the two wires is

Fill in the blanks with correct words and pick the right option:

The specific organs in arthropods for excretion, respiration and locomotion are (i)_______, (ii)________ and (iii)________ respectively.

Most of the carbon dioxide transported in our blood is

The yellow colour of urine of the vertebrates in due to________

Read the following statements about the 'digestive system' and identify the incorrect one(s) :

I.The human digestive system includes the alimentary canal and digestive glands.

II.Amoeba has a simple digestive system.

III.As the functions in an organism increase, the complexity of the digestive system decreases.

IV. The digestive system is the same in all organisms

The maximum number of existing transgenic animals is of:

For fatty acids to be able to enter the pathways of cellular respiration, they must be ______.

Blood pressure is measured by

The embryo sac of angiosperms is made up of ___

A body cools from ${60}^{\circ }\text{C}$ to ${50}^{\circ }\text{C}$ in $10$ minutes. If the room temperature is ${25}^{\circ }\text{C}$ and assuming that Newton's law of cooling holds good, the temperature of the body at the end of the next $10$ minutes will be:

Which of the following statements about MHC are correct?

During the propagation of a nerve impulse, the action potential results from the movement of ______.

Right end of the string is attached to a light frictionless ring which can freely move on a vertical rod. A wave pulse is sent on the string from left propagating with speed $2.5\text{cm/s}$. Initially, the centre of pulse is $5\text{cm}$ apart from the ring. At, $t=2\text{s}$, the shape of string can be given as

Biosphere Reserves differ from National Parks because in the former

Angiotensinogen is converted to Angiotensin by________

Fruits derived from a single flower with more than one ovary are

Acrosomal reaction of the sperm occurs due to___________

Identify a living fossil from the following:

Inverted pyramid of biomass can be traced in which one of the following ecosystems?

Mouth parts of cockroach are of this type:

Which of the following best describes light reaction?

The gametes produced by Mendel’s $F_1$ dihybrid are

A simple pendulum is oscillating without damping. When the displacement of the bob is less than maximum, its acceleration vector $\overrightarrow{a}$ is correctly shown in (see figure.)

Acrosome of the sperm is derived from_______

How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores?

Which of the following is a part of our brain?

Peptide bond between two amino acids is formed by __(i)__ reaction which releases __(ii)__ and forms __(iii)__.

Arrange the biomolecules, Carbohydrates (C), Proteins (P), Lipids (L) and Nucleic acids (N) in a decreasing order of their mass percentages in the composition of biological matter of a cell.

A non steroid hormone from heart to regulate the kidney function is

Which of the following is the relatively most accurate method for dating of fossils

Identify the improper pair from the given options.

Usually a single gene controls a single phenotype. Sometimes one gene may influence more than one phenotypic trait. This phenomenon is known as __

Birth control pills:

Volvox and Fucus sexually reproduce by

If we assume that the 'lock and key model' of the enzyme-substrate interaction is correct, which of these conditions is absolutely true?

Which end of the template DNA is the TATA sequence present on?

Parkinsonism is related with

Solar energy is passed from one pigment to the other until it is concentrated into one particular ______ molecule, the reaction-center chlorophyll.

In the fruitfly, red eye colour is ___________ _____ white eye colour.

Bark does not include

An outcome of Englemann experiment was to help determine

Which of the following is a pre fertilisation event?