The right answer is cyanobacteria.
Cyanobacteria are a division of Gram-negative aquatic bacteria capable of photosynthesis. About two-thirds of the species studied are capable of stabilizing nitrogen and are therefore involved in the nitrogen cycle in the biosphere.
These cyanophytes contain three pigments, green, blue and red.
The answer to number 10 is C
The answer to number 11 is D
The answer to number 12 is D
Hope this helps!!
Contact aureole
Explanation:
A zone of metamorphism around a source of heat such as a body of magma is called contact aureole.
Contact aureoles are used by geologist to understand the kind of metamorphism a terrain has been subject to.
- A contact aureole lies close to an igneous intrusion.
- Such an intrusion bearing hot magma causes metamorphic changes in the rock around it.
- Areas close to the intrusion are the most metamorphosed.
- They are usually characterized by a fine grained texture and nearly glassy appearance due to rapid cooling in place.
- Contact aureoles are common in areas of contact metamorphism.
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Contact metamorphism brainly.com/question/1970623
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The answer is letter d. it has only 2 electrons in its first shell and 4 in the second shell. Basing from the electronic configuration of the carbon atom, the "s" orbital of carbon atom is completely filled leaving now the "p" orbitals partially filled. Thus in this case, carbon atom has four (4) valence electrons.
