Science (English Medium) Class 11 - CBSE Question Bank Solutions

Why does the rate of photosynthesis decrease at higher temperatures?

Dialysing unit (artificial kidney) contains a fluid which is almost same as plasma except that it has ______.

There are many endocrine glands in human body. Name the glands which is absent in male and the one absent in female.

State whether true or false:

Gastrointestinal tract, kidney and heart also produce hormones.

The figure shows the effect of light on the rate of photosynthesis. Based on the graph, answer the following question:

1. At which point/s (A, B or C) in the curve is light a limiting factor?
2. What could be the limiting factor/s in Region A?
3. What do C and D represent on the curve?

Graph of light intensity on the rate of photosynthesis

List the hormones secreted by the following:

Atrium

List the hormones secreted by the following:

Kidney

Differentiate between Apoplast and Symplast pathways of movement of water in plants

How is the mycorrhizal association helpful in absorption of water and minerals in plants?

What are respiratory substrates?

Name the most common respiratory substrate.

Differentiate between Respiration and Combustion.

Many pulses of daily use belong to one of the families below (tick the correct answer)

Which of the following plants is used to extract the blue dye?

Write floral formula for a flower which, is bisexual; actinomorphic; pentamerous sepal, petal, stamens free with ovary, syncarpous, superior, trilocular with axile placentation.

Add the missing floral organs of the given floral formula of Fabaceae.

\[\ce{φ \overrightarrow{\text{♀}} K_{(5)} -> A_{(g + 1)} \underline{G}_{1}}\]

Distinguish between families Fabaceae, Solanaceae, Liliaceae on the basis of gynoecium characteristics (with figures). Also write economic importance of any one of the above family.

Epiblema of roots is equivalent to ______.

What part of the plant would show the following:

Polyarch xylem

The cross-section of a plant material showed the following features when viewed under the microscope.

1. The vascular bundles were radially arranged.
2. Four xylem strands with exarch condition of protoxylem.

To which organ should it be assigned?