Biology, 05.10.2019 10:00 tugordochulo1

What are identical twins? what explains any differences they may develop?

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Answer from: lame3245

Identical twins are the result of fertilization of a single egg by a single sperm.

Explanation:

Identical twins are also called monozygotic or univiteline and account for approximately 30% of cases of double pregnancies. They are the result of the fertilization of a single egg by a single sperm whose zygote in early pregnancy is divided into two (or more), each settling in a different region of the uterus. Because of this fact is that univiteline twins are extremely similar and always are of the same sex.

Identical twins are exactly the same, right? After all, they come from a single fertilized egg, which contains a group of genetic instructions, or genome, formed by combining the father's chromosomes with the mother's.

But experience shows that identical twins are rarely completely equal. Until recently, any differences between twins were largely attributed to environmental influences (also known as “creation”). However, recent studies show that in some cases the DNA of a twin was different from that of his brother at various points in the genome. At these sites of genetic divergence, one had a different number of copies of the same gene, a genetic state called copy number variants.

Answer from: Quest

Glucose, also called grape sugar, blood sugar or corn sugar, is among the simplest and one of the primary naturally occurring sugars. produced naturally by plants as the primary photosynthesis product, it is heavily used by living beings as a main energy source and is necessary for cellular respiration. chemically, it is a monosaccharide carbohydrate and serves as a building block for complex sugars like starch.

Answer from: Quest

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.

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Biology, 22.06.2019 20:00

Ascientist discovers a new body between the orbit of neptune and the kuiper belt. the object is round and travels in an orbit around neptune with other space objects. the scientist claims that she has found a new dwarf planet. where is the scientist’s error? the object is an asteroid, not a dwarf planet.the object is a moon, not a dwarf planet.the object is not a dwarf planet because it travels with other objects.the object is not a dwarf planet because it is round.