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During the day, chloroplasts in the guard cells photosynthesise, which leads to the production of ___. This is used to actively pump the ___ ions of the adjacent cells into the guard cells.

Differentiate between primary and accessory reproductive organs.

Name the type of respiration that occurs in humans?

What is the other name of wind-pipe ?

The capacity to generate a whole plant from any cell or explants is called:

Match the following
$\begin{array}{cccc}A.& \text{Zoophily}& 1.& \text{Pollination by birds}\\ B.& \text{Ornithophily}& 2.& \text{Pollination by insects}\\ C.& \text{Entomophily}& 3.& \text{Pollination by bats}\\ D.& \text{Chiropterophily}& 4.& \text{Pollination by animals}\end{array}$

In the developmental history of mammalian heart, it is observed that it passes through a two-chambered fish like heart, three-chambered frog-like heart and finally four-chambered stage. To which hypothesis can this above cited statement be approximated?

Match the following columns.
$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \text{A}& \text{Zeatin}& 1& \text{Flowering hormone}\\ \text{B}& \text{Florigen}& 2& \text{Synthetic auxin}\\ \text{C}& \text{IAA}& 3& \text{Cytokinin}\\ \text{D}& \text{NAA}& 4& \text{Natural auxin}\end{array}$

The layer of the eye where photoreceptors are present is called ________.

In a cathode ray tube, the thick glass screen is coated with barium platinocyanide because

Which part of the plant is affected by $S{O}_2$ pollution?

What is the temporary solution for kidney failure?

The exchange of nutrients and removal of wastes from embryo takes place in the ………………

Which eye color is more dominant, Brown or Black?

Match the following columns and choose the correct option.
$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{A. Fovea}& \text{1. Provides opening for entry of light}\\ \text{B. Iris}& \text{2. Provides clearest vision}\\ \text{C. Pupil}& \text{3. Transmits information to CNS}\\ \text{D. Lens}& \text{4. Controls amount of light entering}\\ \text{E. Optic nerve}& \text{5. Focuses light on the retina}\end{array}$

Given below are two sets (a and b) of five terms each. Rewrite the terms in their correct order so as to be in logical sequence.

(a) Afferent arteriole, renal vein, capillary network, glomerulus, efferent arteriole.

(b) Renal artery, urethra, ureter, kidney, urinary bladder.

Which of the following substances are the building blocks of chromatin?

(a) What is meant by regeneration ? Name two animals which can regenerate fully from their cut body parts.
(b) Explain why, more complex multicellular organisms cannot give rise to new organisms through regeneration.

The main component that determine water potential are

(a) What are the methods used by plants to get rid of their waste products ?
(b) How are waste products excreted in an Amoeba ?

The new concepts in the biotechnological method is/are

Which of the following is not a product of fermentation?

Which of the following laws did Mendel put forth based on his observations in the monohybrid cross?

Statement 1: Photosynthesis takes place during daytime

Statement 2: It requires carbon dioxide and water

Different versions of a gene are known as -

Define

(i) Law of Segregation

(ii) Law of independent assortment

(iii) Law of dominance

What are the two main communication systems in an animal's body?

From the image below, determine the cell which is plasmolysed, the cell that is flaccid and the turgid cell.

Which of the following are the characteristics of an organism belonging to Pisces?

A spore can be described as :

Oxygen rich blood from pulmonary veins pours into

The diffusion of potassium ions out of a neuron after depolarisation causes : _____.

The medical condition shown in the figure is

Which of the following is motor nerve?

The main cause for the high growth in population is ________.

Describe formation of urine and removal of urine.

About sandbox tree

Select all that is appropriate.

The nervous system,