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IrinaK [193]
3 years ago
8

Which compound was abundant in Precambrian Earth’s oceans, before complex life evolved on Earth?

Biology
2 answers:
LekaFEV [45]3 years ago
5 0
Carbon dioxide is correct
Verdich [7]3 years ago
5 0

Answer:

dissolved carbon dioxide

Explanation:

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How can you test for the gas produced
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Explanation:

Tests for gases

Hydrogen, oxygen, carbon dioxide, ammonia and chlorine can be identified using different tests.

Hydrogen. A lighted wooden splint makes a popping sound in a test tube of hydrogen.

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During the embryonic development of which types of invertebrates does the true coelom develops from the two pouches off the prim
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AnswerThese are the enterocoelomates.Starfish, sea urchins are examples.Generally animals of the phyla annelida, molluscs and anthropoda belong to this group.

They  are animals formed by enterocoely; in which the mesoderm arises from the wall of the embryonic gut archentron. The latter is an hollow outgrowth which forms the coelom.It is the type of coelom found in deuterostome animals.

Explanation:

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The answer is A) Homologous structures

Explanation:

Homologous Structures:

  • Homologous structures are anatomical features in an organism that are structurally and functionally diverse but they originate from a single common ancestor.
  • Homologous structures possess a similar basic internal structure but can have entirely different morphology and function.
  • For example, the wings of a bat and a human's arm have the same internal structure but they have different functions.
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