Question

18. In which of the following vertebrate group/groups, heart
does not pump oxygenated blood to different parts of
thebody?
(a) Pisces andamphibians
(b) Amphibians andreptiles
(c) Amphibiansonly
(d) Piscesonly
19. Choose the correct statement that describesarteries.
(a) They have thick elastic walls, blood flows under high
pressure; collect blood from different organs and bring it
back to theheart
(b) They have thin walls with valves inside, blood flows
under low pressure and carry blood away from the heart to
various organs of thebody
(c) They have thick elastic walls, blood flows under low
pressure; carry blood from the heart to various organs of
thebody
(d) They have thick elastic walls without valves inside, blood
flows under high pressure and carry blood away from the
heart to different parts of thebody.
20. The filtration units of kidneys arecalled



pls answer fast​

Answer 1

Heya..!

18. Pisces only.

19. They have thick elastic walls without valves inside, blood

flows under high pressure and carry blood away from the

heart to different parts of the body.

20. Nephrons.

hope it helps... :)