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3 years ago

Why does ice cream melt and is it a physical change or chemical change

Biology

1 answer:

aalyn [17]3 years ago

4 0

Answer: PHYSICAL change

Explanation: chemical changes usually have to do with air and pollution and things like that.

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how is atmospheric carbon in the form of CO2 converted into a molecule that is usable to all organisms?

mixas84 [53]

Answer:

The carbon-dioxide exists in the atmosphere, and it is dissolved in the water.

Explanation:

With the process of photosynthesis, it becomes organic, and by breathing, the organic gas goes back to carbon-dioxide.

The assimilation of carbon is the process when the carbon-dioxide converts to organic carbon with the help of living organisms. This organic carbon is then used for energy.

8 0

2 years ago

How do glycolysis, pyruvate processing, the Krebs cycle, and the electron transport chain work together to provide energy for th

Ivahew [28]

When the cell gains glucose, the process of glycolysis occurs and then the glucose is broken down into pyruvate.

Now, in pyruvate processing, Acetyl CoA is produced and used in the Krebs Cycle.

During that process, NADH and FADH2 are made and go into the electron transport chain. That is where water and ATP are made.

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2 years ago

What a section of DNA on a chromosome that has genetic information for one trait.

nikklg [1K]

The nucleus? budding is when two cells reproduce asexually

6 0

2 years ago

Read 2 more answers

What could a scientist do to determine what era the Eocene Period belongs to on the geologic time scale?

Burka [1]

Answer:

Option B) study information related to the Cenozoic era

Explanation:

The complete question is

Scientists discovered that the Eocene time period existed in Earths history around 34 MYA. What do they need to do to determine what time period Eocene belongs to on the geologic time scale?

A) learn what happened during Precambrian time

B) study information related to the Cenozoic era

C) view the timing of events in the Mesozoic era

D) research events that happened during the Paleozoic era

Solution -

The period of Eocene belong to the Cenozoic era. The Cenozoic era is divided into three periods-

a) The Paleogene – Existed between 65.5 to 23.03 million years ago

b) The Neogene - Existed between 23.03 to 2.6 million years ago

c) The Quaternary – Started some 2.6 million years ago and is continuing till present

The Paleogene is subdivided into three epochs –

A) The Paleocene – existed between 65.5 to 55.8 million years ago

B) The Eocene – existed between 55.8 to 33.9 million years ago and

C) The Oligocene – existed between 33.9 to 23.03 million years ago

Hence, studying about Cenozoic era will give information about the Eocene epoch

Hence, option B is correct

5 0

3 years ago

Passwords, tokens, and fingerprint scans are all examples of ________. identification authentication authorization credentials

julia-pushkina [17]

The answer to the fill in the blank is option B) Authentication

Passwords, tokens, and fingerprint scans are all examples of Authentication.

We use passwords, tokens and even fingerprints since they can be unique identifications and are usually seen as more secure.

In the above options, fingerprints are seen as the most secure form of authentication since everyone has unique fingerprints.

One of the earliest forms of authentication were time cards used as early as the 1950s and even unique keys and stamps used by early civilizations.

5 0

3 years ago