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Ne4ueva [31]
3 years ago
9

Which organisms were the earliest oxygen-producing life-forms?

Biology
1 answer:
mart [117]3 years ago
5 0

Answer:

The earliest oxygen-producing life forms were Cyanobacteria. Besides Cyanobacteria, these tiny organisms have another name known as blue-green algae

Explanation:Some scientists think that 2.4 billion years ago is when organisms called cyanobacteria first evolved, which could perform oxygen-producing (oxygenic) photosynthesis. Other scientist think that cyanobacteria evolved long before 2.4 billion years ago but something prevented oxygen from accumulating in the air

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What disease affect the circulatory system and the digestive system
Romashka-Z-Leto [24]

Answer:

Heart disease and bulimia, and anorexia

Explanation:

Examine how poor fitness, stress levels and diet can affect the human circulatory and digestive systems; e.g., by causing: ulcers and acid reflex disease. eating disorders; e.g., anorexia, bulimia, high blood pressure and heart disease.

8 0
3 years ago
Which of the following is an INVERTEBRATE?<br> A) Butterfly<br> B) Wasp<br> C) Crab<br> D) Frog
Marina CMI [18]

Answer:

All of the following are invertebrates except for the frog

please give me brainlist!

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Explanation:

all insects are invertebrates

including the crab

4 0
3 years ago
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When a single species, such as ancestor of the Galapagos finches, has evolved into several different forms that live in differen
natima [27]

Answer:

A

Explanation:

In evolutionary biology, adaptive radiation is a process in which organisms diversify rapidly from an ancestral species into a multitude of new forms, particularly when a change in the environment makes new resources available, alters biotic interactions or opens new environmental niches.

4 0
3 years ago
Identify the three domains and the different groups or kingdoms within each domain (marine science)
andre [41]

Answer:

The three domains are the Archaea, the Bacteria, and the Eukarya.

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Prokaryotic organisms belong either to the domain Archaea or the domain Bacteria; organisms with eukaryotic cells belong to the domain Eukarya.

8 0
2 years ago
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Which organelle fills the cell, holds organelles, and is the place for most of the metabolic activity in the cell occur?
Andru [333]

A. Cytoplasm


(The Nucleus is the control, site of DNA)

Cell wall is in plant cells, giving stability and protecting the cell from rupturing. DNA is stored in the Nucleus, not a organelle.


The answer is Cytoplasm, C.

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3 years ago
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