Answer:
Liquids have an indefinite shape, while solids have a definite shape.
Answer:
Option A, most closely related to mammals
Explanation:
Insects like arthropods and molluscs have an open circulatory system and thus do have a distinguishable heart. Fish has two chambered heart. Reptiles have three chambered heart. Amphibians too have a three chambered heart.
All mammals and fish have four chambered heart. The right and left sides of the chambers have restricted entry and hence remain intact from each other
Hence, option A is correct
In an open system such as a campfire, matter can <span>lose particles, gain particles or exchange particles.</span>
C is your answer :)
And also C and D are true but its C.
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