Explanation

Antibodies (immunoglobulins) are mainly present in blood, lymph, and plasma to fight infections.

Saliva contains very few antibodies; it primarily has enzymes like amylase for digestion, not immune defense.

Explanation

The pectoral girdle (also known as the shoulder girdle) is the set of bones that connect the upper limbs to the axial skeleton.

It consists of two main bones: the scapula (shoulder blade) and the clavicle (collarbone).

The glenoid cavity is a shallow, pear-shaped depression located at the lateral angle of the scapula.

Explanation

Guttation is the exudation of liquid water droplets from the edges of leaves through special pores called hydathodes.

It usually occurs at night or early morning when soil moisture is high and transpiration is low.

Explanation

Ascaris is a roundworm classified under Phylum Nematoda.

It has a cylindrical, unsegmented body typical of nematodes.

Explanation

The posterior pituitary gland primarily stores and releases two hormones: oxytocin and antidiuretic hormone (ADH or vasopressin).

These hormones are actually produced by the hypothalamus.

Follicle-stimulating hormone (FSH) is produced and released by the anterior pituitary gland.

It plays a key role in sexual development and reproduction, stimulating the production of eggs and sperm. 

Explanation

The Golgi apparatus (or Golgi bodies) is responsible for modifying, sorting, and packaging proteins and lipids synthesized in the ER.

In plant cells, it also plays a crucial role in synthesizing complex polysaccharides that are essential components of the cell wall. 

Explanation

Rough ER (RER): Has ribosomes → rough appearance; functions in protein synthesis, folding, modification, and transport.

Smooth ER (SER): No ribosomes → smooth appearance; functions in lipid synthesis, detoxification, and calcium storage.

Explanation

The cross product of two vectors depends on the sine of the angle between them.

For parallel vectors, the angle is 0° (or 180°), and sin0°=0, so the cross product is zero.

Explanation

Diffraction is the bending of light waves around obstacles or through narrow openings.

It occurs when the size of the obstacle or slit is comparable to the wavelength of light.

Explanation

The standard unit of cell potential, also known as electromotive force (EMF), is the volt (V).

It represents the potential difference between the electrodes of a galvanic cell under standard conditions

(1 M concentration for all species, 1 atm pressure for all gases, and a temperature of 25°C).