Which organ system(s) is are present in flatworms? A) muscular B) digestive C) r
ID: 181429 • Letter: W
Question
Which organ system(s) is are present in flatworms? A) muscular B) digestive C) reproductive D) excretory E) all of the above. What is characteristic of all ecodysozoans? A) the deuterostome condition. B) a pseudocoelom. C) some kind of exoskeleton, or hard outer covering. D) agile, speedy, and powerful locomotion. E) the diploblastic condition. A direct consequence of indeterminate deavage is A) formation of the archenteron. B) the arrangement of cleavage planes perpenducular 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 association with the blastopore. Which of the following is NOT a shared characteristic of all chordates? A) pharyngeal stilts 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. Which is NOT a true statement? A) All vertebrates are chordates. B) Al.l chordates are vertebrates. c) All protochordates are invertebrates D) Echinoderms and chordates are deuterostomes. E) Sear aquirts and lancelets are invertebrate chordates.Explanation / Answer
94. Two chambered heart is not a characteristic of all fishes. They have four chambers i.e. sinus venoses, atrium, ventricle and bulbus arteriosus.
95. Only muscular, digestive and excretory organ systems are found in flatworms.
96. Exoskeleton or hard outer covering is the characteristic of the ecdysozoans.
97. A direct consequence of indeterminate cleavage is the ability of the cells isolated from the early embryo to develop in to viable individual.
98. Four chambered heart is not a shared characteristic of all chordates.
99. Breaking down organic matter is the primary role of prokaryotes.
100. All chordates are not vertebrates.
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