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dexar [7]
3 years ago
11

Question 7

Biology
1 answer:
azamat3 years ago
3 0

Answer:

A string is placed under a solution and a crystal grows on the string because the solution is supersaturated.

Therefore, the correct answer to the question is option B.

Explanation:

A saturated solution is defined as a solution in which there is no more space for the solute to be added. All the words in the solution is been filled with the solute which is been added before and mixed well to fill up all the pores. Supersaturated solution is defined as a solution which has a greater number of solute than it was being capable of holding.

As it is clear from the name supersaturated which means more than saturation. And when string is placed under this solution there are some crystal which grows on the strings because of the solute saturation which is being attached to the string.

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In simple terms what is nationalism?
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Answer:

Nationalism is a strong attachment to a particular country, or nation. It is also called patriotism. In the modern world, many citizens are very loyal to their country or to their ethnic group. ... Nationalism can have a positive influence by giving people a sense of belonging to a national community

Explanation:

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3 years ago
In a active transport materials move from an area of ? Concentration and use ?
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How many chromosomes does a body cell for the organism (egg and sperm) have?
DiKsa [7]
Growth and repair
creation of gametes (sex cells)
method of reproduction in unicellular organisms
Binary Fission - type of reproduction that occurs in bacterial cells, single celled organism splits and becomes two identical organisms

Chromosomes and DNA

Chromosomes are DNA wrapped around proteins to form an X-shaped structure.



The diagram will help you see the relationship.

1. Chromosomes are found in the nucleus
2. Chromosomes are made of DNA
3. Sections of chromosomes are called genes



DNA - deoxyribonucleic acid (it is the genetic code that contains all the information needed to build and maintain an organism)





Chromosome Structure







Chromosome Numbers

Each organism has a distinct number of chromosomes, in humans, every cell contains 46 chromosomes. Other organisms have different numbers, for instance, a dog has 78 chromosomes per cell.

Somatic Cells - body cells, such as muscle, skin, blood ...etc. These cells contain a complete set of chromosomes (46 in humans) and are called DIPLOID.

Sex Cells - also known as gametes. These cells contain half the number of chromosomes as body cells and are called HAPLOID

Chromosomes come in pairs, called Homologous Pairs (or homologs). Imagine homologs as a matching set, but they are not exacly alike, like a pair of shoes.

Diploid cells have 23 homologous pairs = total of 46

Haploid cells have 23 chromosomes (that are not paired) = total of 23

Homologous Chromosomes



Sex Determination

Chromosomes determine the sex of an offspring. In humans, a pair of chromosomes called SEX CHROMOSOMES determine the sex.

If you have XX sex chromosomes - you are female

If you have XY sex chromosomes - you are male

During fertilization, sperm cells will either contain an X or a Y chromosome (in addition to 22 other chromosomes - total of 23). If a sperm containing an X chromosome fertilizes an egg, the offspring will be female. If a sperm cell containing a Y chromosome fertilizes an egg, the offspring will be male.

Creation of a Zygote

When two sex cells, or gametes come together, the resulting fertilized egg is called a ZYGOTE

Zygotes are diploid and have the total 46 chromosomes (in humans)

Karyotype

A karyotype is a picture of a person's (or fetus) chromosomes. A karyotype is often done to determine if the offspring has the correct number of chromosomes. An incorrect number of chromosomes indicates that the child will have a condition, like Down Syndrome

Compare the Karyotypes below













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Other conditions result from having the wrong number of chromosomes:

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4 0
3 years ago
Laboratory Re
oksian1 [2.3K]

1. Number of chromosomes in the parent cell is 46

2. Number of chromatids in daughter cells formed by first division is 46

3. Number of chromosomes in daughter cells formed by first division is 23

4. Number of chromosomes in daughter cells of second division 23

5. Number of haploid cells formed by meiotic division of parent cell is 4

4 0
3 years ago
Rna in cells differs from dna in that ___________________. select one:
irinina [24]
Hello! 

RNA in cells differs from DNA in that it is single-stranded and can fold up into a variety of structures.

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Viruses don't have DNA, only RNA. They only replicate in the host's cells by copying their own RNA information. 

Have a nice day!
3 0
3 years ago
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