All Free Biology MCQs with Answers

1101. Higher vascular plants are also called__________?

• A. flowering plants
• B. seed plants
• C. ferns
• D. none of these

Explanation: Higher vascular plants are commonly called seed plants or spermatophytes because they reproduce by producing seeds and possess vascular tissues. The likely alternative is flowering plants, but that group excludes gymnosperms, which are also seed-producing vascular plants.

1102. The plants which produce embryo but lack vascular tissues and seeds are placed in_________?

• A. bryophytes
• B. pteridophytes
• C. tracheophytes
• D. all of these

Explanation: Bryophytes produce embryos but lack true vascular tissues and seeds, reproducing instead through spores. Students may select pteridophytes because they are also spore-producing plants, but pteridophytes possess vascular tissues.

1103. Earthworm lives in___________?

• A. sea water
• B. moist soil
• C. fresh water
• D. none of these

Explanation: Earthworms require moist soil because their skin must remain damp for cutaneous respiration and they obtain food from soil containing organic matter. Fresh water may be selected because earthworms live in wet environments, but they are terrestrial rather than aquatic animals.

1104. branches of biology and medicine concerned with the structure and function of plant and animal cells is called___________?

• A. Nephrology
• B. Semiology
• C. Orology
• D. Cytology

Explanation: Cytology is the branch of biology concerned with the structure and function of cells, including plant and animal cells. Nephrology studies the kidneys, semiology concerns signs and symptoms, and orology is associated with the study of mountains or gold depending on usage, not cells. Students may choose nephrology because it sounds like a biological field, but it is organ-specific rather than cell-specific.

1105. Which of the following are connective tissues?

• A. cartilage
• B. bone
• C. blood
• D. all the above

Explanation: Cartilage, bone and blood are all connective tissues because they arise from mesenchyme and contain cells embedded in an extracellular matrix. Cartilage and bone provide support, while blood has a fluid matrix for transport and defense. Students may choose bone alone because it is the most familiar connective tissue, overlooking cartilage and blood.

1106. Simple tissues and complex tissues are two groups of_________tissues.

• A. Meristematic
• B. Permanent
• C. Epidermal
• D. Supporting

Explanation: Plant permanent tissues are commonly grouped into simple tissues, made of one main cell type, and complex tissues, made of more than one type of cell. Meristematic tissue consists of actively dividing cells and is classified separately from permanent tissues. Students may choose meristematic because both terms describe plant tissue groups, but simple and complex are subdivisions of permanent tissue.

1107. Which of the following is a selectively permeable membrane?

• A. cell wall
• B. cytoplasm
• C. cell membrane
• D. none of these

Explanation: The cell membrane is selectively permeable because its phospholipid bilayer and transport proteins allow some substances to cross while restricting others. The cell wall provides strength and is generally freely permeable, while cytoplasm is the internal material rather than the selectively permeable boundary. Students may choose the cell wall because it surrounds the cell, confusing structural support with selective transport.

1108. The light microscope can make the object_________times bigger?

• A. 10 times
• B. 100 times
• C. 1000 times
• D. 10000 times

Explanation: A standard compound light microscope commonly provides a total magnification of about 1000 times, calculated from a 10x eyepiece x 100x objective = 1000x. Higher magnification is possible with specialized instruments, but 1000x is the usual school-level value for a light microscope. Students may choose 100 times by considering only the objective lens and ignoring the eyepiece magnification.

1109. Cell wall is the non living , outermost boundary of__________cell?

• A. plant
• B. bacterial
• C. fungal
• D. all the above

Explanation: Plant, bacterial, and fungal cells generally possess a rigid cell wall outside the plasma membrane, although their wall materials differ. A student may choose plant because plant cells are the most familiar example, but the question includes all three cell types.

1110. During the process of cell division which of the following divides first?

• A. cytodplasm
• B. vacuoles
• C. mitochondria
• D. nucleus

Explanation: In ordinary cell division, nuclear division, called karyokinesis, occurs before cytoplasmic division, called cytokinesis, so the nucleus divides first. Students may choose cytoplasm because cytokinesis is the visible final separation of the daughter cells, but it follows nuclear division.