601. _______ are the first group of invertebrates which have developed a closed circulatory system.
✅ B. Annelids
Option A: Nematods Option B: Annelids Option C: Arthropods Option D: Molluscs Correct Answer : Annelids Read more
Biology MCQs – Page 31
602. Of the following which one is not the characteristic of Kingdom Animalia.
✅ A. All animals are ingestive heterotrophs
Option A: All animals are ingestive heterotrophs Option B: All animals are eukaryotes Option C: All animals develop from the dissimilar gametes i. Option D: E. large sperm and small egg. Correct Answer : All animals develop from the dissimilar gametes i.large sperm and small egg. Read more
603. Coelom is lined by__________?
✅ D. Both A & B
Option A: Parietal mesoderm Option B: Visceral mesoderm Option C: Mesoderm Option D: Both A & B Correct Answer : Both A & B Read more
604. Porifera range in size from__________?
✅ A. Few millimeter wide to more than one meter tall
Option A: Few millimeter wide to more than one meter tall Option B: Few centimeter wide to more than one meter tall Option C: Few decimeter wide to more than one meter tall Option D: One meter wide to more than millimeter tall. Correct Answer : Few millimeter wide to more than one meter tall Read more
605. Enteron in coelenterates acts as___________?
✅ D. all of these
Option A: Digestive cavity Option B: Body cavity Option C: Transporting cavity Option D: all of these Correct Answer : all of these Read more
606. All of the following coelenterates show alternation of generation except:
✅ A. Hydra
Option A: Hydra Option B: Obelia Option C: Aurelia Option D: None of these Correct Answer : Hydra Read more
607. In sponges fertilization takes place in____________?
✅ B. Mesenchyme
Option A: Ectoderm Option B: Mesenchyme Option C: Endoderm Option D: Uterus Correct Answer : Mesenchyme Read more
608. Which of the following are motile zooids in cnidarians?
✅ B. Medusae
Option A: Polyps Option B: Medusae Option C: Both of these Option D: None of these Correct Answer : Medusae Read more
609. Mammals became dominant in__________?
✅ D. Cenozoic era
Option A: Proterozoic era Option B: Mesozoic era Option C: Paleozoic era Option D: Cenozoic era Correct Answer : Cenozoic era Read more
610. Which of the following fishes contained lungs?
✅ D. Dipnoi
Option A: Lamprey Option B: Perch Option C: Plaice Option D: Dipnoi Correct Answer : Dipnoi Read more
611. Notochord is present throughout life in___________?
✅ B. Cephalochordates
Option A: Urochordates Option B: Cephalochordates Option C: Chordates Option D: Vertebrates Correct Answer : Cephalochordates Read more
612. Body is eel like in___________?
✅ A. Cyclostomata
Option A: Cyclostomata Option B: Chondrichthyes Option C: Osteichthyes Option D: None of these Correct Answer : Cyclostomata Read more
613. Body is globular in_________?
✅ B. Sea Urchin
Option A: Cake urchin Option B: Sea Urchin Option C: Sea cucumber Option D: Brittle star Correct Answer : Sea Urchin Read more
614. Second largest phylum of invertebrates is____________?
✅ C. Mollusca
Option A: Porifera Option B: Arthropoda Option C: Mollusca Option D: Chordata Correct Answer : Mollusca Read more
615. 80% of the food of sponges consists of__________?
✅ A. Detrital organic particles
Option A: Detrital organic particles Option B: Zooplankton and small animals Option C: Phytoplanktons Option D: all of these Correct Answer : Detrital organic particles Read more
616. The internal buds are known as__________?
✅ C. Gemmules
Option A: Spicules Option B: Choanocytes Option C: Gemmules Option D: None of these Correct Answer : Gemmules Read more
617. The skeleton of the sponges is in the form of variously shaped needle like structures called___________?
✅ B. Spicules
Option A: Stripules Option B: Spicules Option C: Brails Option D: Spines Correct Answer : Spicules Read more
618. Gut in pseudocoelomates is made from___________?
✅ C. Endoderm
Option A: Ectoderm Option B: Mesoderm Option C: Endoderm Option D: All of these Correct Answer : Endoderm Read more
619. Sperms are _________ in origin.
✅ B. Mesodermal
Option A: Ectodermal Option B: Mesodermal Option C: Endodermal Option D: None of these Correct Answer : Mesodermal Read more
620. Inner layers of the sponges are made up of__________?
✅ C. Choanoytes
Option A: Pinacocytes Option B: Choanoderm Option C: Choanoytes Option D: Pinacoderm Correct Answer : Choanoytes Read more