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3 years ago

The nucleus contains______

Biology

2 answers:

dem82 [27]3 years ago

6 0

Cell chromosomes here is the proof below, if you need more assurance just look it up.

posledela3 years ago

3 0

Answer:

If you're talking about the cell: The nucleus contains the cell's chromosones

If you're talking about the atom: The nucleus contains protons and neutrons.

Explanation:

Have a good day :)

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If left untreated, which sexually transmitted disease will eventually lead to damage of the internal organs and other physical p

IRINA_888 [86]

HIV or AIDS is a sexually transmitted disease that will eventually lead to the damage of the internal organs and other physical problems such as paralysis, numbness, and gradual blindness. HIV or Human Immunodeficiency Virus is a type of disease that affects the Immune System of the body. As the virus continues to spread, the immune system progressively fails allowing other life-threatening diseases to penetrate the body. A person who does not undergo any form of medication has an estimated 9 to 11 years of survival. It can be contracted in many forms either through semen and saliva transfer.

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3 years ago

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Catfish are freshwater fish that have "whiskers" with taste buds, as well as a keen sense of smell for locating prey in murky wa

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Answer:

C. Stream

Explanation:

I did it on Edgnuity, and also streams are murky.

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3 years ago

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Imagine that you attempted to recreate Mendel's work with garden peas. You began by crossing true breeding violet-flowered, tall

salantis [7]

Answer:

(a) 90

(b) 30

(d) 10

F2 data for stem length (tall:dwarf) is consistent with Mendel's law of segregation.

F2 data for stem length (tall:dwarf) and flower color (violet:white) is consistent with Mendel's law of independent assortment

Explanation:

The F2 phenotypes are supposed to be in 9:3:3:1 according to Mendelian law. The total number of F2 progeny is: 80 + 36 + 39 + 5 = 160

(a) Hence, the expected number of tall, violet plants will be:

9/16 x 160 = 90

(b) Expected number of tall, white plants will be:

3/16 x 160 = 30

(d) Expected number of dwarf, white plants will be:

1/16 x 160 = 10.

Total number of tall F2 plants = 80 + 36 = 116

Total number of dwarf F2 plants = 39 + 5 = 44

Expected ratio of tall:dwarf plants according to Mendel = 3:1

Expected number of tall plants = 3/4 x 160 = 120

Expected number of dwarf plants = 1/4 x 160 = 40

Chi square $X^2$

= $\frac{(observed frequency - expected frequency)^2}{expected frequency}$

$X^2$ for tall = $\frac{(116 - 120)^2}{120}$

= 0.1333

$X^2$ for dwarf = $\frac{(44 - 40)^2}{40}$

= 0.40

Total $X^2$ = 0.1333 + 0.4

0.5333

Degree of freedom = n - 1

2 - 1 = 1

Tabulated $X^2$ (α = 0.05) = 3.841

Since the tabulated $X^2$ is more than the calculated $X^2$ , the hypothesis that the F2 data for stem length (tall:dwarf) is consistent with Mendel's law of segregation is accepted.

Observed Expected $X^2$

tall, violet flowers 80 90 $\frac{(80-90)^2}{90} = 1.11$

tall, white flowers 36 30 $\frac{(36-30)^2}{30} = 1.2$

dwarf, violet flowers 39 30 $\frac{(39-30)^2}{30} = 2.7$

dwarf, white flowers 5 10 $\frac{(5-10)^2}{10} = 2.5$

Total 160 160 7.51

Degree of freedom = 4 - 1 = 3

Tabulated $X^2$ (α = 0.05) = 7.815

The tabulated $X^2$ value is more than the calculated $X^2$ value. Hence, F2 data for stem length (tall:dwarf) and flower color (violet:white) is consistent with Mendel's law of independent assortment.

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3 years ago

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antiseptic1488 [7]

Answer:

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Explanation:

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Answer:

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