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Fudgin [204]
3 years ago
15

What are the characteristics of each of Earth’s Layers?

Biology
1 answer:
Andrews [41]3 years ago
6 0
Each layer has its own properties, composition, and characteristics that affects many of the key processes of our planet. They are, in order from the exterior to the interior – the crust, the mantle, the outer core, and the inner core.
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Please help me<br> Which particle, protons, neutrons, or electrons, has the LEAST mass?
faltersainse [42]

Answer:

Electrons are much smaller in mass

Explanation:

Although similar in mass, protons are positively charged, while neutrons have no charge. Therefore, the number of neutrons in an atom contributes significantly to its mass, but not to its charge. Electrons are much smaller in mass than protons, weighing only 9.11 × 10−28 grams, or about 1/1800 of an atomic mass unit.

8 0
3 years ago
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Marfan syndrome is a dominant trait. A cross between a homozygous dominant and a heterozygote would produce what phenotypic rati
umka2103 [35]

Answer:

The correct answer is- 4:0

Explanation:

Marfan syndrome is a genetic problem which affects the connective tissue in the body. The trait for this disease is autosomal dominant which means even one abnormal copy of this gene in the offspring or individual is sufficient to cause this syndrome.

Let S is the allele that is dominant for this syndrome and s is recessive. So if a cross between homozygous dominant(SS) and heterozygous individual (Ss) occurs than all the offspring would have this syndrome.  

                                   S      s

                              S  SS   Ss

                              S  SS   Ss

Therefore all 4 offspring would have at least one dominant allele which is sufficient to cause this syndrome. So the phenotype ratio would be 4:0.

                       

3 0
3 years ago
About how long ago did the first single-celled life form appear on Earth?
stich3 [128]

Answer:

Around 4.1 billion years ago, the first single celled life form appeared on Earth

5 0
3 years ago
What are the different evidences of evolution?
Bingel [31]

Answer:

dna, fossils (fossil layers), similarities in embryos, and similarities in different organisms that are currently existing.

:) have a nice day love ❤

Explanation:

6 0
3 years ago
What can be combined to form various substances
zlopas [31]

Answer:

Atoms of different elements can combine to make new substances. A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound.

Explanation:

4 0
3 years ago
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