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Rudiy27
3 years ago
10

Different layers of the earth exist due to what?

Biology
1 answer:
nevsk [136]3 years ago
6 0
The earth was once formed by molten layers of the earth and over time layers began to form due to the relative melting points. hope this helps :D
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DUE TODAY HELP ASAP HELP PLEASE BABAAAAAAAAAAABBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaSAAAAAAAAA
mihalych1998 [28]

Answer:

We have to conserve water because we need it live.

Explanation:

We use water to clean ourselves, drink, and use in foods.

7 0
3 years ago
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Carbon dioxide molecules diffuse through cell membranes, but many other
Ray Of Light [21]

Answer:

Semi-permeable membrane

Explanation:

In semi-permeable membranes, only some substances can pass through. Sometimes, some can also pass through the channel protein molecules or transport proteins on the cell membrane.

3 0
4 years ago
In Drosophila, vestigial (partially formed) wings (vg) are recessive to normal long wings (vg+) and the gene for this trait is a
Marina CMI [18]

Answer/ Explanation:

a. The genotype of a homozygous white eyed long winged female would be Vg+Vg+XrXr. We denote the white allele as recessive (r) because the XY male only has one copy and yet has red eyes, so the red eye trait (R) must be dominant. A homozygous red eyed vestigial winged male would have be VgVgXRY. The possible gametes for the female are Vg+Xr only. For the male, the possible gametes are VgXR or VgY

The attached punnett square shows the results of the cross. The females will all be Vg+VgXRXr. The males will all be Vg+VgXRY (must inherit Y from father). That means they will all  have normal length wings, the males will have white eyes and the females will have red eyes.

b. The F2 flies arise from intercrossing the F1, so the cross will be Vg+VgXRXr x Vg+VgXRY. The possible gametes for the mother are: Vg+XR, Vg+Xr, VgXR or VgXr. The possible gametes for the father are Vg+Xr

, Vg+Y

, VgXr

, VgY

. The attached punnet square shows this cross. The ratio of the phenotypes will be 6:6:2:2, or 3:3:1:1 (long-winged red eye: long-winged white eye: vestigial wing red eye: vestigial wing white eye), genotypes shown in the attachment.

c. F1 cross back to the mother would be Vg+VgXRY x Vg+Vg+XrXr. The genotypes are shown in the attached punnet square. The offspring will all be long-winged with white eyes. The F1 to the father would be Vg+VgXRXr x VgVgXRY. The ratio would be 3:3:1:1 long-winged red eye: long-winged white eye: vestigial wing red eye: vestigial wing white eye

Download docx
7 0
3 years ago
Please help with my biology
FromTheMoon [43]

Answer:

The answer should be Carbohydrates

Explanation:

Not sure if thats a typo on your end

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A desirable intake of dietary fiber for a woman under age 50 is ____ daily, according to the dri guidelines.​
lbvjy [14]

Base on studies and researches and the DRI guidelines in which had provided factual and evidence, the desirable intake of dietary fiber among women who is under at the age of fifty years old is that they should have twenty five grams of fiber daily.

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