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Masteriza [31]
3 years ago
10

Which of the following is not a characteristic of a parenchyma cell?

Biology
1 answer:
AfilCa [17]3 years ago
3 0
Thick rigid cell wall is not  characteristic of a parenchyma cell
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How does independent assortment during Metaphase 1 help produce diversity in gametes (eggs and sperm)?
Svetach [21]

Answer:

a. There are different possible ways that homologous pairs might line up

c. Different alignments of homologous pairs will cause different combinations of alleles in gametes.

Explanation:

The law of independent assortment, proposed by Mendel, states that the alleles of one gene segregate into gametes independently of the alleles of another gene. This means that the segregation of one gene does not affect another. This law of independent assortment is evident during gamete formation in sexually-reproducing organisms know as meiosis. Specifically, in the Metaphase 1 stage of meiosis 1, homologous chromosomes (similar but non-identical chromosomes received from each parent) lines up at the metaphase plate (cell equator).

The lining up of chromosomes in this stage occurs randomly making it possible for chromosomes to align in different possible ways. The way/manner the chromosomes align at the equator determines which chromosome combination gets separated into which gamete. The homologous chromosomes are randomly distributed at the cell's equator before segregates into gametes. This random orientation enables the alleles of each gene on a chromosome to combine in different random ways, hence, allowing genetic diversity in the resulting gametes (sperm and egg) they get segregated into.

6 0
3 years ago
According to the chart, which substance has the lowest OH- concentration?
SVEN [57.7K]

The correct answer is option (B) lemon juice.

pH refers to the logarithmic scale used to indicate the acidity or basicity of an aqueous solution. It is the negative of the base 10 logarithm of the activity of the hydrogen ion. Solutions with a pH less that 7 are considered acidic and the solutions with a pH greater that 7 are considered to be basic. A pH of 7 is neither an acid nor a base and is considered neutral.

An acid has a high concentration of hydrogen ions (H+)  and a base has a low concentration of hydrogen ions. Higher the hydrogen ion concentration, pH is acidic. Among the given substances, lemon juice has a pH of 2, urine has a pH of 6, tomato juice has a pH of 4 and black coffee has a pH of 5.  Since lemon juice has a pH of 2, it has the lowest –OH ion concentration.

6 0
3 years ago
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Describe 3 types of barriers that can cause population to become reproductively isolated from each other
mariarad [96]
1. A mountain
2. A border
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6 0
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during fetal development, the modeling for bone is first seen in both processes when ____is deposited.
Rzqust [24]

Answer: Calcium crystals

Explanation:

7 0
2 years ago
What is the definition of backgrounding operation
stepan [7]

Um i think the definition for back-grounding is an intermediate stage sometimes used in cattle production which begins after weaning and ends upon placement in a feedlot. I think i am correct i am 84% sure. Mark brainiest if this helped.

Have a nice day or night

8 0
3 years ago
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