Model Paper 2 — BIOLOGY STD 12 Science — Question

Which one of the following process help the watersoluble inorganic nutrients go down into the soil horizon and get precipitated as unavailable salts?

Nif genes are found in-

One of the parents of a cross has mutation in its mitochondria. In that cross, that parent is taken as a male. During segregation of F2 progenies that mutation is found in.

The attachment of the mammalian blastocyst to the uterine wall is

The Leydig’s cells as found in the human body are the secretory source of

Which of the following enzyme is secreted by yeast, responsible for fermentation

Ovulation can be detected by

Mark the incorrect statement