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aleksklad [387]
3 years ago
15

Infer why obsidian which is black or red in color can have a granitic composition

Biology
2 answers:
erica [24]3 years ago
8 0

Answer: Obsidian is an igneous rock that forms in the same way a granite forms, so their silica content is also quite same. When hot magma that are highly rich in silica and which are highly viscous because of its high silica content, comes out to the surface after eruption, it undergoes fast cooling, as a result of which the crystals do not get much time to form larger crystal. So they contain smaller crystals. And this dark variety of obsidian such as red or jet black is due to the presence of iron oxides such as hematite and magnetite.

Thus, obsidian and granite has a similar composition and both are igneous rocks.

Gemiola [76]3 years ago
5 0

It can have a granitic composition for the reason that it can be composed of the similar minerals like that of granite, however the magma cools right away prior to crystals having a chance to form in the rock rather than forming into a rock created with interlocking crystals.

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The macromolecule shown here  is an amino acid because of the carbon that bears the amine group and the acid group.

<h3>What is a macromolecule?</h3>

The term macromolecules refers to those molecules that have a large molecular weight. They can mostly be found in biological  systems and play various roles in the body

The macromolecule shown here  is an amino acid because of the carbon that bears the amine group and the acid group. There are four elements present as follows;

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5 0
2 years ago
A certain type of flower has two alleles for color (blue, purple), and two alleles for stem height (tall, short). A tall blue fl
larisa86 [58]

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Mendel's law of independent assortment

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Gregor Mendel is a really important figure in genetics, his work on pea plants provided us with many of the fundamentals of genetics that we still have today!

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1. The law of dominance - this law states that where there are two different alleles (heterozygous) the organism will always express the dominant trait over the recessive trait

2. The law of segregation - this law states that offspring will inherit one allele from each parent, because allele pairs separate in the process of meiosis, such that each gamete contains 1 allele of each trait. When the zygote is formed, it contains an allele from each parent.

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This example shows that all combinations of the height and color allele are possible, and therefore nicely demonstrates the law of independent assortment

6 0
3 years ago
Which of the pathways for nucleotide biosynthesis builds the base ring on a PRPP molecule?
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5-Phosphoribosyl-1-pyrophosphate (PRPP). is used for the synthesis of purine (ribose 5-phosphate reacts with ATP to form  ribonucleotide).

8 0
4 years ago
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