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lilavasa [31]
2 years ago
6

Many present-day animal phyla appeared suddenly in fossils formed 535-525 million years ago, during the paleozoic era of the pha

nerozoic eon. this period is referred to as the cambrian explosion. does this period mark the beginning of animal life?
Biology
1 answer:
frez [133]2 years ago
8 0

The correct answer is - No.

The Cambrian explosion is a term used for the big and rapid diversification of the animal species, but it is not the period in which the animal life started. The animal life started in the period between 620 and 550 million years ago, in what is known as the Vendian Period. In the Vendian Period, the first complex animal organisms appeared, started to develop and evolve, though it is not a period where there was a high diversification of the species. The later Cambrian Period provided better living conditions, and that resulted in a so called ''explosion of life'', which resulted in much more new species developing and evolving.

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ValentinkaMS [17]
I believe the ecosystem
8 0
3 years ago
The experimental technique that involves transfer of dna from an electrophoresis gel to a membrane, followed by detection with a
Irina-Kira [14]
The answer is _southern blotting_

Hope this helps
7 0
2 years ago
Which of the following best describe gas particles?
timama [110]

Answer:

a, b, d (see below)

Explanation:

So, looking at the 3 states of matter:

Solid - holds a shape and is made up of particles that vibrate in place (because particles are always moving no matter what)

Liquid - holds shape of its container and has particles with some space in between them that allow them to flow

Gas - holds shape of its container and has particles with huge gaps of space between them that are always, constantly moving and zooming around

Refer to the image below for a better visual understanding.

So, now, looking at the answer choices:

a) moving randomly

Yes. They are—they're speeding around super fast all the time.

Every time heat is added to something, the particles start loosening up and moving.<em> A lot.</em>

So when you add heat to a solid, it starts loosening up and moving around until it becomes flowy enough to be a liquid. Then, if more heat is added, the particles moving faster and loosen up even more until they're a gas.

Imagine doing that one more time, and you'll have plasma. As you may have guessed it, plasma moves <em>super fast</em>

<em />

b) collide into each other

Yes. Because they're moving so fast and uncontrollably all the time, they're bound to have rammed into one another a few or more times.

Imagine bumper cars at a carnival, except the speed of each car is sooo fast that you could be on a highway. You're probably going to hit someone, which is why bumper cars are not that fast in reality. For safety reasons.

c) move slow

No. Since we know that they're always zooming around (refer to my bumper car example above, in bold), they obviously can't be slow.

d) high kinetic energy

Yes. Anything moving (a.k.a. in motion) has kinetic energy. If gases zoom super fast 24/7, they will have high kinetic energy.

Having high kinetic energy means that the something is moving really fast or a lot. In this case, gases are both.

e) moving orderly

No. They're moving everywhere and really fast, so they have no control over how they move because of how fast they are.

(refer to my bumper car example in answer b, in bold)

7 0
2 years ago
A ____ of lack of rain turned the topsoil to dust
Flauer [41]

The answer you are looking for is “Drought”.

4 0
3 years ago
How did increasing respiratory distress impact the mental and emotional level of the person???
rewona [7]
Mental wise would go down many aspects even the thought of dieing soon and emotional impact of loved ones and worrieness.
4 0
2 years ago
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