Question 17 Lichens are only found growing on living matter. symbiotic associati
ID: 99348 • Letter: Q
Question
Question 17
Lichens are
only found growing on living matter.
symbiotic associations between a fungus and an alga.
insensitive to changes in the environment.
parasitic interactions between a fungus and an alga.
capable of causing some obscure diseases.
Question 18
The segmented worms of the phylum Annelida
are acoelomate.
move by use of flagella.
display radial symmetry.
have an open circulatory system.
possess setae on each segment.
Question 19
Which of the following are adaptations to land of both gymnosperms and angiosperms but are lacking in ferns and mosses?
vascular system
roots, stems, and leaves
pollen and seeds
spores
fruits and flowers
Question 20
Cnidarians and ctenophores are similar in that they both have
mesoderm.
radial symmetry.
a digestive tract with two openings.
nematocysts.
a pseudocoel.
A.only found growing on living matter.
B.symbiotic associations between a fungus and an alga.
C.insensitive to changes in the environment.
D.parasitic interactions between a fungus and an alga.
E.capable of causing some obscure diseases.
Explanation / Answer
Answer 17 is B
lichen is always symbiotic association between alga and fungus in which both partners helping each other.In this alga form food and fungi gives protection .
Answer 18 is E
It possess setae on each sement because setae helps in movement .
Answer 19 is A
Ferns and mosses lack True vascular system. it always grows in moist environment.
Answer 20 is D
Both possess Nematocyst . it is a cell which contain poison if it inject in any organsim then it can kill that animals . It helps in defence of its member.
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