Question

Which of the following is NOT a characteristic of ll Fish? A) two-chambered heart B) aquatic life C) presence of jaws. D) skin with scales E) gills as respiratory organ. Which organ system(s) is /are present in flatworms? A) muscular B) digestive C) reproductive 95. D) excretory E) all of the above. What is characteristic of all ecdysozoans? A) the deuterostome condition. B) a pseudocoelom. C) some kind of exoskeleton, or hard outer covering. D) aglle, speedy, and powerful locomotion. E) the dipioblastic condition 96. A direct consequence of indeterminate cleavage is 97 A) formation of the archenteron. 8) the arrangement of cleavage planes perpendicular to the egg's vertical axis. c) the ability of cells isolated from arly embryo to develop into viable individuals. D) the unpredictable formation of either a schizocoelous or enterocoelous body cavity. E) a mouth that forms in assoclation with the blastopore. 98. Which of the following is NOT a shared characteristic of all chordates? A) pharyngeal slits B) post-anal tail C) notochord. D) dorsal hollow nerve chord. E) four chambered heart What is the primary role of prokaryotes? A) parasitizing eukaryotes thus causing diseases. B) metabolizing materials in extreme environments. C) breaking down organic matter D) adding methane to the atmosphere E) serving as primary producers in terrestrial environments. 99. 100. Which is NOT a true statement? A) All vertebrates are chordates. B) All chordates are vertebrates C) All protochordates are invertebrates D) Echinoderms and chordates are deuterostomes E) Sear aquirts and lancelets are invertebrate chordates

Answer 1

Ans 94. Presence of jaws is not a characteristic of all fishes. There are some jawless fishes also .

Ans 95 . Excretory system is present in which flame cells are involved.

Ans 96.pseudocoelom is a characteristic of ecdysozoans.

Ans 97. Option c. The ability of cells from early embryo to develop into viable individual cells.

Ans 98 . Four chamberes heart is not a characteristic of all chordates. Ambhibians are chordates but they have 3 chambered heart.

Ans 99. Primary role of prokaryotes is to break down the organic matter. Bacteria are decomposers.

Ans 100 . All chordates are vertebrates. This is incorrect statement. Some chordates are protochordates also.