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4 years ago

Which is the first era of Earth’s history?

Biology

2 answers:

sergiy2304 [10]4 years ago

7 0

I believe it’s Precambrian.

Igoryamba4 years ago

7 0

Answer:

Paleozoic era

Explanation:

The first major extinction in Earth's history occurred two to five million years ago, two deadly climaxes over hundreds of thousands of years. Most creatures lived in the seas at this time, so many of the marine creatures of that time, such as trilobites, brachiopods, and graptolites, were destroyed. During this third deadliest extinction, 5 to 5 percent of all species have been extinct.

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Uranus’s first moons were discovered in 1787. Some of Uranus’s 27 moons were not discovered until 2003. Why do you think it took

Alexandra [31]

Answer: some moons are farther away and harder to spot

Explanation:

6 0

3 years ago

This evidence of evolution shows similarities and differences in embryos between species

AVprozaik [17]

Answer:

Embryology

Explanation:

Embryos of different vertebrate groups are morphologically similar during the early stages of development. The closer the resemblance between the early stages of different organisms, the closer their evolutionary relationship. Such similarity suggests a common ancestry.

3 0

3 years ago

1. Examples of a(n) include the skeletal system, respiratory<br> system, and circulatory system.

mr_godi [17]

skull
lungs
heart

Explanation:

if that is what your asking for

3 0

3 years ago

What makes a series of helpful variations in a species result in

Fed [463]

Answer: healthy and happy species in a environment

Explanation:

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3 years ago

In an ecosystem, why can only one species fill an ecological niche? (Site 1)

Anastaziya [24]

Answer:

Only one species can fill an ecological niche because each niche is destined exclusively for each species, since its structure, physiology and behavior determine it.

Explanation:

An ecological niche is the way in which each species relates to its environment, to other species and takes advantage of the resources available for its development, being an exclusive and individual characteristic of that species.

The ecological niche is a concept that many consider abstract, since it is unique for a species. Each species has a physical structure, functioning and behavior that differentiates it from the others, which leads it to occupy a certain place within an ecosystem, which would be its ecological niche.

Learn more:

Ecological niche brainly.com/question/718384

6 0

4 years ago