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HCl was passed through a solution of $CaCl_2$, $MgCl_2$ and $NaCl$. compound(s) crystallise(s)?
Which one of the following structures is haploid in its ploidy level?
DNA replication is semi-conservative in nature. This was experimentally proved in eukaryotes by:
In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons respectively. The material is a/an:
Which of the following is the initiation codon:
The kinetic energies of a planet in an elliptical orbit around the Sun, at positions A, B and C are $K_A$, $K_B$ and $K_C$ respectively. AC is the major axis and SB is perpendicular to AC at the position of the Sun S, as shown in the figure. Then:
Which of the following hormones can play a significant role in osteoporosis?
Sweet potato and potato represent a certain type of evolution. Select the correct combination of terms to explain the evolution.
An alpha nucleus of energy 1/2 mv² bombards a heavy nuclear target of charge Ze. Then the distance of closest approach for the alpha nucleus will be proportional to
Given below are the stages in the life cycle of pteridophytes. Arrange the following stages in the correct sequence: A. Prothallus stage B. Meiosis in spore mother cells C. Fertilisation D. Formation of archegonia and antheridia in gametophyte
The output ($Y$) of the given logic gate is similar to the output of an/a:
The above figure shows the circuit symbol of a transistor. Select the correct statements given below: (A) The transistor has two segments of p-type semiconductor separated by a segment of n-type semiconductor. (B) The emitter is of moderate size and heavily doped. (C) The central segment is thin and lightly doped. (D) The emitter base junction is reverse biased in common emitter amplifier circuit.
Darwin's finches are an excellent example of:
A 250 turn rectangular coil of length $2.1 \text{ cm}$ and width $1.25 \text{ cm}$ carries a current of $85 \, \mu\text{A}$ and subjected to the magnetic field of strength $0.85 \text{ T}$. Work done for rotating the coil by $180^{\circ}$ against the torque is:
Match List-I with List-II: List-I A. Gene pool B. Genetic drift C. Genetic flow D. Genetic equilibrium (Gene frequency) List-II I. Stable within a generation II. Change in gene frequency by chance III. Transfer of genes into or out of population IV. Total number of genes and their alleles
A transistor is operated in a common emitter configuration at constant collector voltage $V_c = 1.5 \text{ V}$ such that a change in the base current from $100 \text{ } \mu\text{A}$ to $150 \text{ } \mu\text{A}$ produces a change in the collector current from $5 \text{ mA}$ to $10 \text{ mA}$. The current gain ($\beta$) is:
Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them.
Which of the following is the correct match?
Strobili or cones are found in
Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin