Which best describes ciliate movement: a)Driven by a large flagella b) Driven by
ID: 213551 • Letter: W
Question
Which best describes ciliate movement:
a)Driven by a large flagella
b) Driven by pushing out fluid through the oral groove
c) Driven by a pair of large flagella
d) Driven by a surface layer of tiny hairs
An exoskeleton containing calcium carbonate (CaCO3) and chitin is found in which group? This group is also an arthropod and has aquatic and terrestrial members.
a) Crustacea
b) Osteichthyes
c) Tetrapoda
d) Hexapoda
What anatomical feature allows some arbuscular fungi to exchange nutrients more efficiently with their symbiotic plant partners, piecing the plant cell wall with these?
a) Hyphae
b) Chitin
c) Fruiting body
d) Mycelium
e) Haustoria
Closed circulatory systems are an adaptation associated with shrinking body size.
a) True
b) False
c) True, but only acoelomates
d) True, but only for pseudoceolomates
Explanation / Answer
Answer : Q.1) d
The cilia are contractile structures and in them two types of rythms known as metachronic and isochronic or synchronous rhythms produce the wave of contractions in the cilia. In the metachronic type of rhythm the cilia of row beat one after the other, while in the synchronous or isochronous rhythm, all the cilia of row beat simultaniously. In contrast to the cilia, the flagella exhibit undulant motion and beat independently.
Answer: Q.2) a
Answer: Q.3) d
Answer: Q.4) b
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