MHT-CET PCB 02 — MHT - CET STD 12 Science — Question

Through which of the following experiments DNA was proved to be the genetic material in E. coli and bacteriophage?

Standard hydrogen electrode (SHE) is a ______.

A potentiometer wire has a length of 4m and resistance of 5Ω. It is connected in series with 495 Ω resistance and a cell of e.m.f. 4V. The potential gradient along the wire is ______

Generally the zygote or early embryo with how many blastomeres is transferred into the fallopian for further development, in IVF?

Ebullioscopic constant depends on ____________.

Let `bar"a" = 2hat"i" + hat"j" - 2hat"k" and bar"b" = hat"i" + hat"j"`. Let `vec"c"` be a vector such that `|bar"c" - bar"a"| = 3, |(bar"a" xx bar"b") xx bar"c"|` = 3 and the angle between `vec"c" and vec"a" xx vec"b" "be" 30^circ`. Then `vec"a" * vec"c"` is equal to ______.

A cylindrical bar magnet is kept along the axis of a circular coil. If the magnet is rotated about its axis, then ____________.

Match the columns and choose the correct option.

	Column I		Column II
i.	Ecological isolation	a.	Sexually mature at different times of the year
ii.	Ethological isolation	b.	Specific mating behaviours
iii.	Mechanical isolation	c.	Difference in structure of mating organs
iv.	Seasonal isolation	d.	Same geographic region but separate habitat