CBSE Class X – Science Biology Exam ( Full Syllabus)

A single copy of ‘T’ is enough to make the plant tall whereas both copies have to be ‘t’ for the plant to be dwarf. Therefore, Tallness is a dominant trait whereas dwarfness (t) is a recessive trait

Sexual reproduction Require exchange of genetic materials of male and female gametes to form

During sexual reproduction, both mother and father pass their genes to their children, thus determining their traits; or Attribute features

The sex of the children will be determined by what they inherit from their father. A child who inherits an X chromosome from her father will be a girl and the one who inherits a Y chromosome from him will be a boy

formation of single cell during sexual reproduction by fusion of nuclei of male and female gamates.

Genes are carriers of genetic information and are responsible for the transmission of characteristics from parents to offspring's.

Bread mould prefers damp/warm conditions with ample nutrient supply, on which air-borne spores land and germinate.

Sexual reproduction involves fertilisation of male and female gametes to produce zygote having genetic variations. Clones cannot be produced through it as clones are identical copies of parent organism.

Organisms look similar because they have similar body designs. As the DNA in the cell nucleus is the information source for making proteins and therefore this information source is changed, different proteins will be made which will lead to altered body designs.

Reproduction is linked to the stability of populations of species., but variation is useful for the survival of species.

Bisexual flowers contains both reproductive organs, male & female.

The process of digestion begins in the mouth. The mouth contains a digestive enzyme, salivary amylase. This enzyme breaks the starch molecules in the food, into maltose. The absence of amylase in the saliva thus afects the breakdown of starch into simpler sugar molecules.

A nephron is a fltering unit present in kidney. It has diferent parts like Bowman’s capsule, glomerulus and tubular region (Renal tubule). Glucose, amino acids and salts are selectively reabsorbed in tubular region.

Anaerobic respiration (in absence of oxygen) in yeast is known as fermentation as ethanol (alcohol), carbon dioxide and 2 ATP molecules of energy is produced from glucose

Small intestine receives Juices from liver, pancreas and walls of small intestine. Bile Juice from liver emulsifes the fats and makes the medium alkaline. Pancreas and small intestine Juices contain amylase, lipase and tryspin

The opening and closing of the pore is a function of the guard cells. The guard cells swell when water fows into them, causing the stomatal pore to open. Similarly, the pore closes if the guard cells shrink.