Question

8 The diagram shows the human gut. Which numbered
structures secrete digestive enzymes?
Oesophagus
(food pipe)
5
4
3
(a) 1, 2, 3 and 4
(c) 2, 3, 4 and 5
(b) 1, 2, 3 and 6
(d) 2, 3, 5 and 6​

Answer 1

Answer:

A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle. ... Some scientists think there could be as many as one hundred billion galaxies in the universe.

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