Explanation

 Amylase is secreted in its active form to help break down carbohydrates.

Other enzymes like peptidase and protease are secreted as inactive precursors.

Explanation

The embryological stages of all vertebrates show similarities in anatomical features, reflecting a common evolutionary origin.

Explanation

The wings of birds and flying lizards are examples of convergent evolution, where different species evolve similar traits independently, often due to similar environmental pressures.

Explanation

A reflex action does not typically involve the brain;

it is usually mediated by the spinal cord, along with sensory and motor neurons.

Explanation

A competitive inhibitor binds to the active site of an enzyme, preventing the substrate from binding.

This type of inhibition is typically reversible, as the inhibitor competes with the substrate for the same binding site.

The inhibition can be overcome by increasing the concentration of the substrate.

Competitive inhibitors do not accelerate the reaction and are generally not irreversible.

Explanation

The lipid molecules give fluidity and elasticity to the membrane and membrane protein gives semi-permeability to the membrane

The plasma membrane is also selectively or differentially permeable.

It allows free transport of solvent, i.e., water across it but will not allow free transport of solute particles.

Explanation

The autonomic nervous system controls involuntary activities like cardiac muscle contraction, salivation, and smooth muscle contraction,

but thoughts and emotions are regulated by the central nervous system (CNS).

Explanation

 Lysosomes contain hydrolytic enzymes that are involved in breaking down various biomolecules through hydrolysis.

Explanation

 The endoplasmic reticulum (ER), particularly the smooth ER, is responsible for the production of steroids, along with lipid synthesis.

Explanation

 Enzymatic activity can be inhibited by heavy metal ions, which can disrupt the enzyme's structure and function.