Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

Variation in length of the filament of stamen can be seen in.

  1. Salvia

  2. Mustard

  3. Chinarose
  4. Both $(1)$ and $(2)$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Salvia (sage) is well-known for its specialized pollination mechanism involving a lever system in the stamen, where the filaments vary in length to facilitate pollen transfer by insects.

Multiple choice biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

Which of the following statements is TRUE about glandular epithelium is salivary gland?

  1. It consists of isolated single cells

  2. It consists of multicellular cluster of cells

  3. Its secretions are endocrine

  4. It consists of squamous epithelial cells
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Glandular epithelium in salivary glands is organized into multicellular structures known as acini or secretory units. These clusters of cells are specialized for the production and secretion of saliva, rather than existing as isolated cells or simple squamous layers.

Multiple choice biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

Enzyme ptyalin or salivary amylase present in the saliva gets activated by 

  1. Mastication of food

  2. Hydrolysis of food by saliva

  3. Starch present in the food

  4. Chloride ions present in saliva
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chewing or mastication is the process by which food is crushed and ground my teeth. It is the first step of digestion, and it increases the surface area of foods to allow a more efficient break down by enzymes. So the correct option is 'Mastication of food '.

Multiple choice biology water a precious resource water cycle earth's energy budget bio-geo chemical cycles in nature

The process by which water change into water vapour is called as

  1. Transpiration

  2. Evaporation

  3. Condensation

  4. Precipitation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Evaporation is the phase transition where liquid water gains enough energy to become water vapor. Transpiration is a specific biological form of evaporation from plants, while condensation is the reverse process.

Multiple choice biology water a precious resource water cycle earth's energy budget bio-geo chemical cycles in nature solar energy and its applications

Which of the following process in the water cycle takes place due to rapid cooling of air?

  1. Condensation

  2. Evaporation

  3. Precipitation

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Condensation occurs when water vapor cools down and loses energy, transitioning back into liquid droplets. Rapid cooling of air reduces its capacity to hold water vapor, forcing it to condense.