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NCERT Exemplar Solutions Class 7 Science Solutions for Transportation in Animals and Plants - Exercise in Chapter 11 - Transportation in Animals and Plants
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Aquatic animals like fish excrete their wastes in gaseous form as
(a) Oxygen
(b) Hydrogen
(c) Ammonia
(d) Nitrogen
Answer:
The answer is (c) Ammonia
Explanation:
Oxygen is expelled out by plants, Hydrogen is a cellular waste product, Nitrogen is excreted in the form of urea and the organisms which excrete urea is called as ureotelic organisms. Aquatic animals will excrete waste products in the form of ammonia gas which dissolves in water and these organisms are known as ammonotelic animals.
Video transcript
"hello everyone welcome to little this is
priya and here we have a question
about rutherford's alpha particle
scattering experiment
so let us look into the question the
rutherford's
alpha particle scattering experiment
was responsible for the discovery of
a atomic nucleus b electron
c proton and d neutron
so coming to the answer of this
the answer is atomic nucleus
so the nucleus has discovered by this
experiment of alpha particle scattering
experiment which has done by rutherford
so according to this experiment so
when alpha particles are have been
scattered
through a gold foil some most of the
alpha particles have penetrated through
this atom but some
alpha particles were reflected back and
this was because the
nucleus which is present inside inside
the atom or atom of this cold
so the nucleus of atom that is
positively charged was discovered by
rutherford's
alpha particle scattering experiment
so hope you understand this video if you
like my video please subscribe to a
little channel and if you have any
doubts you can keep a message in comment
box thank you"
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