Ecosystem

Name the nutrition resulted by feeding on dead and decaying matter.

Which of the following does not belong to angiospermic families?

The African sleeping sickness is caused by:

Pick the biotic component from the following.

Name the class that contains seedless plants.

____________ did not have the adaptations to remove the flooding of their cells in fresh water.

The cell suspension culture of __________ produces quinine.

Name the external factor of growth in plants.

Which of the following promotes both leaf and fruit growths?

Tse-tse fly causes the sleeping sickness and skin diseases by transmitting:

________ are bioindicators of air pollution.

Penicillin is obtained from:

The productivity of aquatic ecosystem is determined by:

The nutrient cycles are also called:

An area previously supporting life is made barren, the subsequent recolonization is called _.

Feeding by living in or on the other organism (host) belonging to different species is called?

In roots the apoplast pathway of water is disrupted when water reaches:

Phloem is generally found on outer side of:

When guard cells become turgid, transpiration:

The main force that draws water from the soil for plants is caused by:

Stomata of a plant opens due to

The translocation of organic solutes in sieve-tube members is supported by:

Guard cells help in:

Which cell are the responsible for movement of sugar as per mass flow hypothesis.

The biogas plant is tank which is

Lignin could not be expected in which part of the plant cell wall:

Which cells regulate the opening and closing of the stoma?

Which hormone is involved in the opening and closing of stomata?

Which of these cells are not present in phloem?

The loss of liquid via the hydathodes is called _.

Who proposed pressure flow theory?

Which of the following is incorrect for the ascent of sap?

The external solution having more concentration than the cell sap is known as:

Which element has function in opening and closing of stomata?

Casparian strips are found in?

The total kinetic energy of water molecule is known as:

The loss of liquid via the hydathodes is called:

Pressure flow theory was formulated by

When we cut a tree, it produces water in the cut region. This is due to:

The release of droplets of water from hydathodes is called:

In plants, the exchange of gases in leaves takes place at:

The water potential of pure water is:

In a woody stem, transpiration takes place through?

Excess water is forced out in the form of droplets through

Ions cannot cross which part of the plasma membrane?

Diffusion is opposite to _

The movement of minerals or water via extracellular pathway is known as?

Which of the following is the most widely accepted theory for the ascent of sap?

The loss of water from the aerial parts of the plant is known as:

Who proposed the starch-sugar hypothesis?

The upward movement of sap by the xylem is:

Passive processes for the movement of molecules across the cell surface membrane are:

Which of the modes of cellular transport requires energy?

In osmosis water molecules move from area of?

Water and Minerals move down their concentration gradient through plasmodesmata to cells of cortex, endodermis, pericycle, and then to sap in the xylem cells. This is also known as the:

Why do some vegetables lose water when salt is applied to them?

At night transpiration takes place by

What does 'a' in the following picture show?

When the concentration of the external medium is equal to the concentration of the internal medium of a cell, the situation is called:

Which one of the following is hypertonic solution to cells present in it?

Which of the following types of transpiration account for 5 - 7 % of total transpiration that take place in plants?

Evaporation of water from the aerial parts of the plants, especially through the stomata of the leave creates a force which is cause of water movement in higher plant is _.

In pressure flow theory, when water moves out of sieve tube cells by osmosis, it lowers the _.

The water moves by osmosis from nearby xylem into the sucrose containing sieve tube which increases the _ pressure of the sieve tube element.

Identify the only cells in leaf epidermis, which are NOT connected to other cells by plasmodesmata and are involved in photosynthesis.

The main cause of creation of tension between water molecules is _ which helps to make water chains pulled up xylem sap.

A destarched leaf on a potted plant was covered with Black (A) Transparent (B) strips of paper as shown in figure. After 6 hours of exposure to sunlight the leaf was removed from the plant and tested for starch. Which are the following will be the correct observation?

Translocation of organic solutes in plants takes place through:

Exposure to _ light is effective in photosynthesis as it enables guard cells to take up K+ and open the stomata.

In an isotonic solution there would be:

The diagram shows a tree trunk, with a ring of bark, which includes the phloem removed.The tree will eventually die because this action cuts off the supply of:

Which diagram illustrates the process of active transport?

Minerals salts enter a plant largely through its:

In roots, the apoplast pathway of water is disrupted when water reaches:

Movement of ions and large molecules with the help of protein molecules in and out of the cell is called _

The diagram shows a model to demonstrate the mass flow hypothesis of translocation. In a plant, what are the structures W, X, Y, and Z, and what is the direction of the flow of solution along W?

Identify the incorrect statement from the following:

Transport of glucose across the cell membrane occurs by:

Water vapor exits and CO2 enters a leaf through the _.