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Question 94: An animal having double circulation in a three-chambered heart is:
(a) fish
(b) snake
(c) deer
(d) sparrow

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Answer: (b) snake
Snake is a reptile and has a double circulation in a three-chambered heart. Pisces (e.g. fish) has a single circulation in a two-chambered heart, while mammals (e.g. deer) and birds (e.g. sparrow) have a double circulation in a four-chambered heart.
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WHAT MAKES SOUNDS SEEM DIFFERENT TO US We hear different kinds of sound. The sound of a sitar is quite different from that of a tabla. When we stand dose to a loudspeaker, the sound produced by it seems very loud. But the same sound seems faint to a person standing a kilometre away. How sounds seem to us depends on many things. Let us see what they are. Fitch We can easily distinguish between male and female voices. When someone plays the flute, we can distinguish between the different sounds produced when the different holes on the fiute are dosed. These sounds seem different to us because of their pitch. We say that a female voice has a higher pitch (is more shrill) than a male voice. The call of a koel has a higher pitch than that of a bull. The sounds of drums and tablas have a lower pitch than those of sitars and violins. Note that vou cannot measure pitch and give it a value. You can only compare two sounds and say that one is at a higher pitch than the other. The pitch of a sound depends on its frequency. The higher the frequency, the higher is the pitch. Our brain tells us whether a sound is of higher or lower pitch than another sound, even though we do not know the frequencies of the sounds. So, we can say the following. Fith describes how the hrain interprets the frequency of sound. Figure shows the variations in density with distance for two sounds with different pitches. Note that the higher-pitch sound has a higher frequency as it completes more oscillations than the lower-pitch sound while covering the same distance.
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Question Text
Question 94: An animal having double circulation in a three-chambered heart is:
(a) fish
(b) snake
(c) deer
(d) sparrow
TopicLife Processes
SubjectScience
ClassClass 10
Answer TypeText solution:1
Upvotes21