Sample paper 4
Question: 1
Which of the following statements is false with respect to class Monocotyledoneae?
A. Grass is an example of class Monocotyledonae.
B. Embryo has one cotyledon
C. Monocotyledons have a single cotyledon
D. Vascular cambium usually absent
E. Monocotyledons generally have reticulate venation
Correct Answer: E. Monocotyledons generally have reticulate venation
Explanation:
Monocotyledons generally have parallel venation. In parallel venation, the veins are present parallel to
each other. Reticulate venation is a characteristic of dicot plant where the veins emerge from different
parts of the main vein.
Question: 2
Heart develops from
A. Lateral plate mesoderm
B. Intermediate mesoderm
C. Ectoderm
D. Endoderm
E. Paraxial mesoderm
Correct Answer: A. Lateral plate mesoderm
Explanation:
Lateral plate mesoderm is found at the periphery of the embryo. The circulatory system develops from
the lateral plate mesoderm. Intermediate mesoderm develops into kidneys and gonads. Cartilage,
skeletal muscles etc. develop from paraxial mesoderm.
Question: 3
Which of the following is/are the characteristics of euglenoids?
A. Autotrophic
B. Heterotrophic
C. Presence of pellicle
D. Presence of flagella
E. All the above
Correct Answer: E. All the above
Explanation:
Euglenoids are the protists which come under the group flagellates. They live in both fresh water and
marine environment. They contain pellicle, a protein rich membrane which helps them in flexibility.
They are mixotrophic which means that they are photosynthetic in the presence of sunlight and
heterotrophic when they lack sunlight.