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Dimas [21]
3 years ago
13

Which statement illustrates how progress in engineering has affected the

Biology
1 answer:
aliina [53]3 years ago
8 0

Answer:

The answer is option D "Machines have replaced much of the manual labor once needed to run a farm."

Explanation:

* Progress in Engineering: This simply means how technological machines like heavy tractors which are now used and are helpful in farming are  evolving, meaning they are being used in a larger quantity now.

* Natural Environment: This is the normal way of life or doing things which individuals find themselves practicing in a particular society and at a particular point in time.

* As a result of the machines being developed as an Engineering progress which serves the work of people on the farms, there tends to be less manual labor that would be initially required to run a farm. The machines are now serving the work of human beings (laborers) now.

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Classify the following characteristics depending on if they describe events occurring in mitosis, meiosis I, or meiosis II.
Temka [501]

Answer:

Mitosis events are:

Results in 2 genetically identical

diploid nuclei

A diploid number of sister

chromatids align at the spindle

equator during metaphase

Meiosis I events are:

Results in 2 genetically diverse

haploid nuclei

Homologous chromosomes align

at the spindle equator during

metaphase

Homologous chromosomes pair

up during prophase

Crossing-over occurs during

synapsis

Meiosis II events are:

Results in 4 genetically diverse

haploid nuclei

A haploid number of homologous

chromosomes align at the spindle

equator during metaphase

Explanation:

Mitosis is a type of cell division which produces two daughter cells that are genetically identical to the parent cell. In mitosis, the chromosome number of the parent cell is maintained in the daughter cells i.e. a diploid cell (2n) will undergo mitosis to produce two diploid (2n) daughter cells. During mitotic division, sister chromatids (replicated chromosomes) are involved in the division stages. i.e. diploid sister chromatids align at the equator of the cell during Metaphase and also sister chromatids are separated or pulled apart to opposite poles during Anaphase.

Meiosis, on the other hand, is a kind of cell division that results in daughter cells with a reduced number of chromosome (by half). Since the chromosome number is reduced, meiosis occurs in a two step division process viz: Meiosis I and II.

Meiosis I produces two genetically different daughter cells. The daughter cells have a reduced number of chromosomes i.e. from diploid (2n) to haploid (n). Meiosis I involves homologous chromosomes (similar but non-identical chromosomes received from each parent) which pair up to form a TETRAD structure in the Prophase stage. This structure allows for an exchange of chromosomal segment between non-sister chromatids of homologous chromosomes, a process called CROSSING-OVER. Crossing-over is what makes the daughter cells genetically different from the parent cell. Homologous chromosomes also aligns at the equator of the cell during Metaphase and later separates during Anaphase.

Meiosis II divides the two daughter cells produced in meiosis I into four genetically different daughter cells. Since the chromosome number has been reduced from diploid (2n) to haploid (n) in meiosis I when homologous chromosomes separate, haploid sister chromatids are involved in the stages of meiosis II i.e. haploid sister chromatids align at the equator of the cell during Metaphase and eventually becomes pulled apart during Anaphase.

5 0
3 years ago
As you know bone marrow makes red blood cells, white blood cells and platelets and as you grow it begins to store fat. What do y
Anon25 [30]
It allows the recipient to cure certain things like sickle cell disease.

can help those w/ leukemia !

All recipients have impairment for a while after the transplant
5 0
3 years ago
2
velikii [3]

Answer:

science is the method of obtaining knowledge through observation and experimentation

Explanation:

4.B.-carrying out investigation

C-observing the natural world

3 0
3 years ago
The part of earth that contains the air we breathe ?
Crank
This question is pretty vague and confusing.
3 0
3 years ago
How do the structures observed under magnification help the organism carry out basic functions of life? Write your findings in t
Tpy6a [65]

Answer:

io

Explanation:

4 0
3 years ago
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