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9966 [12]
3 years ago
7

What conditions are needed to form organic molecules from inorganic molecules? (A: Abundance of oxygen and the ozone layer) (B:

Active volcanoes and very cold temperatures) ( C: Presence of inorganic molecules with lightning and intense radiation) (D: Low levels of ultraviolet radiation and a specific mixture of gases).​
Biology
1 answer:
schepotkina [342]3 years ago
6 0

Answer:

c

Explanation:

the theory suggest that formation of organic molecules takes places by the help of inorganic material along with lightening and intense radiation

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The atomic number of argon is 18 and its mass number is 40. Describe the number and type of particles
Paul [167]

Answer:

Argon's atoms have 18 protons, 22 neutrons in its nucleus, orbited by 18 electrons- its atomic mass= P 18 +N 22.

Explanation:

Atoms are the most basic unit of matter that makes up elements. Atoms are composed of electrons orbiting neutrons and protons surrounding a nucleus.

The atomic number is defined as the number of protons in an atom, while the atomic mass is the number of protons and neutrons.

The element Argon, Ar is a noble gas, that exists in a gaseous, inert, state at temperature. Its atoms have 18 protons, 22 neutrons in its nucleus, orbited by 18 electrons- its atomic mass= P 18 +N 22.

There are 8 valence electrons in its outer shell, thus:

  • Ar is not very reactive, as it does not require electron sharing in atomic bonding.
  • It shows low conductivity, as there are no free electrons  

7 0
3 years ago
Which level of organization is formed from two or more different tissues that group together and perform a function? (4 points)
zalisa [80]

Answer:

i think system is correct

Explanation:

for example heart is an organ. it has muscle tissue .epithelial tissue . connective tissue nervous tissue

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The answer is A
Using energy
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Which property of water helps plants to transport water from their roots to their leaves? a. high specific heat b. cohesion C. a
Darina [25.2K]

Answer:

cohesion

Explanation:

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scientist hypothesize that the development of organisms with which ability led to the collection of oxygen in earth atmosphere
miss Akunina [59]
The answer is tiny organisms known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen. In fact, all the plants on Earth incorporate symbiotic cyanobacteria (known as chloroplasts) to do their photosynthesis for them down to this day.
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