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Nat2105 [25]
3 years ago
15

1. What percentage of the weight of Earth's crust is made of silicon?

Biology
1 answer:
sladkih [1.3K]3 years ago
7 0

Answer: 27.7 percent

Explanation:

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What is the genotype of blood group B
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Answer:

genotype of bg B can be two

1st is Ibi

2nd is IbIb

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3 years ago
D - Telophase
Eddi Din [679]

Answer:

A-B-C-D

Explanation:

PROPHASE; 1. chromosomes become thicker

2. nuclear membrane disintegrates

3. centrosome divide to form centrioles

4. centrioles move to the opposite polls of the cell

METAPHASE; 1. chromosomes get arranged at the equator

2. centrioles produce spindle fibre that attach to the middle of the chromosomes

ANAPHASE; 1. shortest stage of mitosis

2. spindles will pull apart each chromosomes to form chromatids

TELLOPHASE; 1.  each chromatid moves to opposite polls of the cell

2. nuclear membrane appears around both of them

3. the centrioles sill stop producing spindles

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cytokinesis then divides by the cleavage furrow to form the two daughter cells

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3 years ago
Match the feature with its description
Ray Of Light [21]

<span>Features matched with its description 
A: stalactites      3: tubes with hollow centers 
B: stalagmites    2: tubes without hollow centers</span>

<span>C: speleology     1: cave science</span>

D: speleothems 4: cave features

<span>
</span>Speleology is shortly defined as the<span> scientific study of caves.</span> Speleothems are structures<span> formed in a cave by the deposits of minerals from water dripping from the fractures of the ceiling of the cave. Most common types are the stalactites and stalagmites. </span>

<span>Stalactites began as a ring of crystals which later becomes small tubes with a hollow center.</span><span> Stalagmites, on the other hand, are tubes formed without hollow centers. </span>

8 0
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Which best completes the table?
Cloud [144]

Answer:

Solar Energy

Explanation:

The table is about renewable and non renewable natural resources which may or may not pollute the environment. Natural gas and wind are the renewable energy resources which do not adversely affect the environment. Coal is non renewable energy resource that release harmful gases into the air  upon burning. Solar energy is another example of renewable resource that do not pollute the environment.

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