Free Animal and Plant Cell MCQs with Answers
275 Animal and Plant Cell MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Animal and plant cells share a plasma membrane, cytoplasm, nucleus, ribosomes, mitochondria and endoplasmic reticulum, but plant cells also have a cellulose cell wall, chloroplasts and a large permanent vacuole. Questions cover organelle structure and function, differences between the two cell types, and how membranes control movement of substances.
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275 questions · page 10 of 14
- A. Amoeboid cell
- B. Stipules
- C. Spicules
- D. Spines
Explanation: Amoeboid cells in the sponge mesohyl capture sperm from the water and transport them to the region containing eggs.
Correct answer: Amoeboid cell- A. Calcium
- B. Silica
- C. Both of these
- D. None of these
Explanation: Sponge skeletons may contain calcium carbonate spicules or silica spicules, depending on the group, and some also contain spongin fibres.
Correct answer: Both of these- A. Peritandrous
- B. Pertandrous
- C. Protendrous
- D. Protandrous
Explanation: Protandrous sponges produce functional sperm before eggs, reducing the chance of self-fertilization and encouraging cross-fertilization.
Correct answer: Protandrous- A. Scolymastra joubini
- B. Euplectella
- C. Spongilla
- D. Leucoselenia
Explanation: Scolymastra joubini is a giant Antarctic sponge reported to grow more than one metre tall.
Correct answer: Scolymastra joubini- A. To increase the size of the animals
- B. To help in the functioning of reproductive system
- C. To provide space for the development of organs and systems
- D. None of these
Explanation: The coelom provides a fluid-filled space in which internal organs and organ systems can develop, move, and function without being tightly…
Correct answer: To provide space for the development of organs and systems186. In most triploblasts after embryonic development the three layers are represented as___________?
- A. Separate layers of cells
- B. Structures formed from them
- C. Structures associated with them
- D. Their functions in body
Explanation: During development, ectoderm, mesoderm and endoderm do not usually remain as simple separate sheets; they differentiate into organs and…
Correct answer: Structures formed from them- A. Annelida
- B. Arthropoda
- C. Mollusea
- D. Echinodermata
Explanation: Annelids, arthropods and molluscs are protostomes, whereas echinoderms are deuterostomes.
Correct answer: Echinodermata- A. Pseudocoelom
- B. Enterocoelom
- C. Schizocoelom
- D. None of these
Explanation: In an enterocoelom, the coelom forms as pouches that bud outward from the archenteron, the primitive gut.
Correct answer: Enterocoelom- A. Arthropods
- B. Hemichordates
- C. Annelids
- D. Molluses
Explanation: Arthropods, annelids and molluscs are protostomes, while hemichordates are generally grouped with deuterostomes.
Correct answer: Hemichordates- A. Pinacocytes
- B. Choanoderm
- C. Choanoytes
- D. Pinacoderm
Explanation: The inner lining of a sponge is the choanoderm, and it is made of flagellated collar cells called choanocytes that create water currents…
Correct answer: Choanoytes- A. Ectodermal
- B. Mesodermal
- C. Endodermal
- D. None of these
Explanation: Sperm develop from germ cells associated with the reproductive organs, which are derived from mesoderm in the traditional germ-layer…
Correct answer: Mesodermal- A. Ectoderm
- B. Mesoderm
- C. Endoderm
- D. All of these
Explanation: The epithelial lining of the gut develops from endoderm, even in pseudocoelomates, whose body cavity is not completely lined by mesoderm.
Correct answer: Endoderm- A. Stripules
- B. Spicules
- C. Brails
- D. Spines
Explanation: Sponges commonly contain mineral or organic needle-like skeletal elements called spicules, which provide support and protection.
Correct answer: Spicules- A. Spicules
- B. Choanocytes
- C. Gemmules
- D. None of these
Explanation: Freshwater sponges produce resistant internal buds called gemmules, which help them survive unfavorable conditions and later develop into…
Correct answer: Gemmules- A. Sycon
- B. Euplectella
- C. Leucoselenia
- D. Spongilla
Explanation: The Venus flower basket is Euplectella, a glass sponge with a delicate lattice-like skeleton.
Correct answer: Euplectella- A. Ectodermal
- B. Endodermal
- C. Mesodermal
- D. None of these
Explanation: In acoelomate animals, the digestive tract is an endodermal structure, while mesoderm fills the region between the gut and body wall.
Correct answer: Endodermal- A. Spiral and indeterminate
- B. Radial and indeterminate
- C. Radial and indeterminate
- D. Spiral and determinate
Explanation: Protostomes typically show spiral, determinate cleavage, meaning the fate of each early blastomere is largely fixed.
Correct answer: Spiral and determinate- A. Diploblastic
- B. Triploblastic
- C. Both
- D. Unicellular
Explanation: Radiate animals such as cnidarians develop from two primary germ layers, ectoderm and endoderm, so they are diploblastic.
Correct answer: Diploblastic- A. Anima
- B. Anemia
- C. Aname
- D. All of these
Explanation: The word animal comes from the Latin anima, meaning breath, soul or living principle.
Correct answer: Anima- A. Amphibians
- B. Reptiles
- C. Birds
- D. Prototherians
Explanation: Reptile eggs usually have a tough, flexible, leathery shell that reduces water loss while allowing some exchange of gases.
Correct answer: Reptiles