Choose the correct answer from each of the four options given below:

The nephrons discharge their urine at the:

• Urinary bladder

• Urethra

• Renal pelvis

• Renal pelvis

Name the following:
The exchange of chromatid parts between the maternal and the paternal chromatids of a pair of homologous chromosomes during meiosis.

Name the following:

The pollutants that cannot be broken down to simple and harmless products.

Name the following:

The immunity acquired by providing readymade antibodies from outside for treating certain infectious diseases.

Choose the correct answer from each of the four options given below:

The individual flattened stacks of membranous structures inside the chloroplasts are known as:

• Grana

• Stroma

• Thylakoids

• Thylakoids

Name the following:

The number of individuals inhabiting per unit area.

Choose the correct answer from each of the four options given below:

Gigantism and Acromegaly are due to:

• Hyposecretion of Thyroxine.

• Hyposecretion of Growth horrnone

• Hypersecretion of Thyroxine

• Hypersecretion of Thyroxine

Name the following:

The part of the brain that carries impulses from one hemisphere of the cerebellum to the other.

Choose the correct answer from each of the four options given beiow:

A plant cell may burst when:

• Turgor pressure equalises wall pressure.

• Turgor pressure exceeds wall pressure.

• Wall pressure exceeds turgor pressure.

• Wall pressure exceeds turgor pressure.

Complete the following paragraph by filling in the blanks (i) to (v) with appropriate words:

The amount of urine output is under the regulation of a hormone called (i) _____ secreted by the (ii)______ lobe of the pituitary gland. If this hormone secretion is reduced, there is an increased production of urine. This disorder is called (iii)______ . Sometimes excess glucose is passed with urine due to hyposecretion of another hormone called (iv) ________ leading to the cause of a disease called (v)_____ .