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adoni [48]
2 years ago
11

How do biologists learn which organisms we're the ancestors of today's plants?

Chemistry
1 answer:
Norma-Jean [14]2 years ago
5 0

by classifying into categories that get smaller and smaller  these are the classification steps :  life , domain , kingdom , phylum , class,  order , family , genus , and species every time you narrow it down the option gets smaller and smaller till there's none left except the species it self .

 

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Geologic time is a way to _______.
mylen [45]

Answer: Geologic time is a way to measure the sequence of events on Earth over time

Explanation:

3 0
2 years ago
Use the periodic table to choose the element that matches each description.
nika2105 [10]

Using the periodic table to choose the element that matches each description include the following below:

  • Halogen: iodine
  • Group IIA: magnesium
  • Nonreactive: argon
  • Alkali metal: potassium.

<h3>What is a Periodic table?</h3>

This contains elements which are arranged according to the order of their atomic number in a tabular form. There are 18 groups which are the vertical columns present while there are 8 periods which are the horizontal rows present in the periodic table.

Example of an alkali metal is potassium while the non reactive ones include argon, neon etc. Examples of halogens include chlorine, iodine etc. are the ones which have seven electrons in their outer electron shells thereby just requiring one electron to achieve to obtain a stable octet configuration.

These are therefore the elements which match the descriptions provided in this case and is the most appropriate choice.

Read more about Periodic table here brainly.com/question/15987580

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8 0
1 year ago
Compare how entropy changes for the following two systems:
postnew [5]

System A undergoes an increase in entropy while system B undergoes a decrease in entropy.

Entropy is the degree of disorderliness of a system. The entropy of a system depends on the number of particles present in the system as well as the state of matter.

Entropy is increased when solid particles dissolve in water because more particles are produced thereby increasing the level of disorderliness in the system.

On the other hand, when vapor is condensed, the degree of disorderliness decreases as gases are converted to liquids.

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7 0
2 years ago
The teacher in item 10 also needs to order plastic tubing. If each of the 60 students need 750 mm of tubing, what length of tubi
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45 m. If each student needs 750 mm of tubing, the teacher should order 45 m of tubing.

a) Find the <em>length in millimetres</em>

Length = 60 students x (750 mm tubing/1 student) = 45 000 mm tubing

b) Convert <em>millimetres to metres </em>

Length = 45 000 mm tubing x (1 m tubing/1000 mm tubing) = 45 m tubing

6 0
2 years ago
The animal kingdom is large and diverse. Scientists discover new species all the time, and they need a way to classify them. The
tatiyna

The answer is D, because "Animals without a backbone are invertebrates."

4 0
3 years ago
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