1
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because
A
female gametophyte is free and gets dispersed like seeds.
B
female gametophyte lacks archegonia.
C
megaspores possess endosperm and embryo surrounded by seed coat.
D
embryo develops in female gametophyte which is retained on parent sporophyte.
2
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Consider the following four statements whether they are correct or wrong.
A.   The sporophyte in liverworts is more eleborate than that in mosses.
B.    Salvinia is heterosporous.
C.   The life-cycle in all seed-bearing plants is diplontic.
D.   In Pinus male and female cones are borne on different trees.

The two wrong statements together are
A
A and C
B
A and D
C
B and C
D
A and B.
3
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Which one of the following aspects is in exclusive characteristics of living things?
A
Isolated metabolic reactions occur in vitro
B
Increase in mass from inside only
C
Perception of events happening in the environment and their memory.
D
Increase in mass by accumulation of material both on surface as well as internally.
4
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
The pairs of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description?
A
$$O_2^ - ,O_2^{2 - }$$ - Both diamagnetic
B
$$O_2^ + ,{O_2}$$ - Both paramagnetic
C
O, $$O_{2}^{2-}$$ - Both paramagnetic
D
$${O^ + },O_2^{2 - }$$ - Both paramagnetic