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Eduardwww [97]
3 years ago
12

How does crossing over in meiosis result in genetic variation?

Biology
1 answer:
Aneli [31]3 years ago
8 0

Cross over is the first  way genes are shuffled to give rise to genetic diversity. Cross over takes place in sexual  reproduction.  The normal way that cross over occurs is chromosomes line up side by side and break off pieces of themselves, then trade those pieces with each other.

If they break the pieces at the same locus in the sequence of base pairs, the result is an exchange of genes called  genetic recombination and it ensures that the daughter cells produced  have a different genetic makeup from the parent cell and thus diversity occurs.

  

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How did scientific names impact classification
Zanzabum
Actually, the names don't affect the classification at all - it does not matter how something is called, as it does not change its characteristics. 

The classification of organism is based on their evolution and characteristics and it's a scientific consensus based on the data. Names don't impact it at all. 

However, to increase understanding in science, scientist made the names after the place in the classification - so the scientific classification determines the names (but not the other way round). 

Most offten you can tell how an animal is classified from the name, but only because it was named after this classification. 
8 0
3 years ago
Which two types of molecules are formed as a product of cellular respiration?
Cloud [144]

Answer:

carbon dioxide and water

Explanation:

the most simple answer would be co2 and h20 since they are two molecular waste products formed as a result of cellular respiration, but ATP is also a product and is a molecule. So the question itself is faulty, since there are three products in cellular respiration.

It depends on how you learned it, but it says 2 so I would go with CO2 and H20.

8 0
3 years ago
Read 2 more answers
In all forms of life, which molecule codes information about physical traits? A large molecule called ____ codes information abo
Butoxors [25]

Answer:

macromolecules,polymer

3 0
2 years ago
Read 2 more answers
How can scientists use vertebrate embryo development to build evidence for the claim that vertebrates are somewhat closely relat
Yuri [45]

Answer:

All early vertebrate embryos develop tails and gill slits, and therefore this type of anatomical evidence supports common ancestry  

Explanation:

Embryology is a discipline that studies the structural/anatomical features and development of embryos. Embryos are a fundamental piece of evidence to support common ancestry among vertebrates because there are homologous structural features that can only be observed during the first stages of vertebrate development. For example, all vertebrate embryos (e.g., fish, chicken and human embryos), develop tails and gill slits during their first stages of embryo development. In consequence, embryology provides evidence for evolution of vertebrates.

3 0
3 years ago
Please answer the following questions correctly​
Oksi-84 [34.3K]

Answer:

i.   Name each of the parts labelled I, II, III, IV and V.

                           {5 marks}

I - Crown / Enamel

II - Dentine

III - Cement / Periodontal membrane

IV - Jaw bone / Root

V - Pulp Cavity

ii   What is the function of each of the parts labelled I and III?

                    {2 marks}

I - Protects teeth from harmful bacteria

-- Enable teeth withstand pressure of chewing

-- Cutting / chewing / protects dentine / protect pulp cavity

III - hold tooth firmly (in socket / Jaw bone)

iii  Which of the labelled parts could be affected by tooth decay?

                                   {1 mark}

V - Pulp cavity

iv  State three ways by which tooth decay may be prevented.

                      {3 marks}

→ avoid using sharp-pointed objects

→ avoid having dry mouth

→ use water containing fluorides to wash teeth / mouth

→ avoid smoking

→ the teeth should be cleaned regularly after each meal / remove food particle from the teeth / flossing

→ wash the mouth vigorously after each meal

→ regular visit to the dentist

→ avoid eating too hot foods

→ avoid eating too much sugary food

→ avoid eating too cold food / taking too cold drinks

Explanation:

6 0
2 years ago
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