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tino4ka555 [31]
4 years ago
13

What were probably the first living things

Biology
1 answer:
olga_2 [115]4 years ago
7 0

Answer: prokaryotes (single celled micro-organisms/microbes)

Explanation: The first living things on Earth, single-celled micro-organisms or microbes lacking a cell nucleus or cell membrane known as prokaryotes, seem to have first appeared on Earth almost four billion years ago, just a few hundred million years after the formation of the Earth itself.

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1. Geologists use physical properties to identify minerals. For example, the blank
Agata [3.3K]

Answer:

The correct answer is - crystal form (external shape).

Explanation:

Physical properties are used for the identification of the minerals that include specific gravity, streak, texture, luster color, hardness, cleavage, and crystal form.

The most common physical property of the minerals in crystal form or external shape of the mineral. This is the property of the mineral that gives an idea about the homogenous possessing a 3-D internal order.

8 0
3 years ago
A 20 fluid oz. soda contains 201 calories. how many kilojoules does the soda contain?
algol [13]
  The relation between calorie and kilo joul is  

1Cal=4.184 Kj  

1 Cal--------------------4.184 Kj
201 Cal--------------------- X Kj  
X=201*4.184/1=840.98 Kj  
<span>20 fluid oz. soda contains 840.98 Kj</span>
7 0
3 years ago
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A group of single-cell organisms collected from the ocean was brought into the lab for examination. The lab assistant was concer
jolli1 [7]

The correct answer is C. She added water that was hypotonic to the culture of organisms, and they ruptured.

Explanation:

In biology, a hypotonic solution is a substance with less concentration than the inner concentration in cells, this is the opposite of a hypertonic solution that has a higher concentration. Additionally, if cells are in hypotonic solution water or liquid will begin to get into them and this would make cells burst and finally explode and die due to the pressure in them.

This occurred in the case presented as it is likely the organisms collected from the ocean had a high concentration and therefore hen they were exposed to clean water in which concentration was lower, water entered into the cells and made them explode, which explains the only remains of them were bit and pieces.

8 0
3 years ago
What is a gene? O the different forms of a trait a segment of DNA that is the basic unit of heredity O the appearance or charact
Marysya12 [62]

Answer:

a gene is the different forms of a trait a segment of DNA that is the basic unit of heredity

Explanation:

3 0
3 years ago
1) The density of a substance is the ratio of its mass to its volume. The formula for density is: D = mass/volume. If the densit
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Yes d =the mass value and
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