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statuscvo [17]
2 years ago
7

Which is the world's oldest desert?​

Biology
2 answers:
vodka [1.7K]2 years ago
5 0

Answer:

Below:

Explanation:

The Namib Desert


Hope it helps...

It’s Muska..≧◉◡◉≦


lina2011 [118]2 years ago
5 0

Answer:

The Namib Desert

Explanation:

It has existed for at least 55 million years

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What allows some individuals to have an advantage over others of the same species
aev [14]
It’s B, having variation from sexual reproduction because the two parent mix genetic information so they have more of an advantage
6 0
3 years ago
What are the various characters of living beings​
Doss [256]

Answer:

All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these eight characteristics serve to define life.

Explanation:

What are the characteristics of living beings?

Although nonliving things may show some of these characteristic traits, only living things show all of them.

Organization. Living things are highly organized, meaning they contain specialized, coordinated parts. ...

Metabolism. ...

Homeostasis. ...

Growth. ...

Reproduction. ...

Response. ...

Evolution.

7 0
3 years ago
Please help its due in a hour!!!!!
garri49 [273]

Answer:

1. The difference between the normal hemoglobin protein DNA sequence and the sickle cell hemoglobin DNA sequence is a base to base shift, in this case adenine (GAG) to thymine (GTG).

2. The difference affects the amino acid sequence of the protein by replacing glutamic acid (Glu) with valine (Val).

Explanation:

In sickle cell anemia, a change in the DNA nucleotide sequence is observed, where adenine is substituted by thymine, whose expression is the change in the amino acid sequence of globine β, incorporating valine instead of glutamic acid. This represents a molecular mutation - point mutation - by subtitution, which corresponds to missense mutation.

<u>Normal hemoglobin protein in a RBC</u>

DNA                 CTG ACT CCT GAG GAG AAG TCT

Amino acids     Leu  Thr   Pro   Glu   Glu   Lys   Ser

<u>Sickle cell hemoglobin protein in a RBC</u>

DNA                 CTG ACT CCT <em>GTG</em> GAG AAG TCT

Amino acids     Leu  Thr   Pro   <em>Val</em>   Glu   Lys   Ser

When GAG is transcribed to mRNA, the CUC codon is obtained, which codes for glutamic acid. Thymine substitution causes the DNA sequence to change to GTG, which is transcribed as CAC, the codon that encodes the amino acid valine. The <u>change from glutamic acid to valine in β-globin causes an altered hemoglobin, giving the abnormal erythrocytes observed in sickle cell disease</u>.

6 0
3 years ago
Taste molecules are unique because different molecules trigger _______ in the nose and mouth
Kazeer [188]

Answer:

taste and smell

Explanation:

triggers taste

example

hold your nose put a fruit candy in your mouth you will notice there will be a slight different taste

these molecules trigger basic taste

4 0
3 years ago
The two molecules that make up the sides of the ladder or the side portion of a dna molecule are
valina [46]
Answer: sugars and phosphates
8 0
3 years ago
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