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Ad libitum [116K]
3 years ago
7

Help me!!! Please!!!!!7th grade science

Biology
1 answer:
fenix001 [56]3 years ago
4 0

Answer:

Eukaryotic means "true nucleus" in Greek.

Have a nucleus.

Have membrane bound organelles.

Typically much larger than prokaryotic cells.

Multicellular, meaning more than one cell.

Explanation:

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If we know the atoms mass in amu and we know the number of protons of the atom, can we calculate the number of neutrons that con
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Yes you can. The atomic mass measured from the proteins and neutrons in an atom, since you know he number of protons, you can subtract and be left with the number of neutrons.
5 0
3 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
Contact with infected cats and their feces is the only mode of transmission of Toxoplasma to humans. Contact with infected cats
Mkey [24]

Answer:

False

Explanation:

Toxoplasma is a congenital disease that is characterized by mild muscle aches, tender lymph nodes, etc. and in some immuno-compromised individuals, seizures and coordination loss may occur. I

The disease is caused by a protozoan known as <em>Toxoplasma gondii </em>and its infection is usually by eating foods (usually meats) that contain the cyst of the organism or making contact with cats that are infected in addition to infected mother-baby transmission, especially during pregnancy.

<em>Hence, humans can contract the organism not just by exposure to an infected cat but also by eating meats that contain the cysts of the organism.</em>

8 0
4 years ago
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Which number best fits the phase where DNA replication occurs?
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Answer:

deoxyribonucleic acid

Explanation:

DNA stand for that

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3 years ago
1. How does the number of chromosomes in a cell that results from meiosis compare to the number of chromosomes in the original c
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Explanation:

2osotsptso5eye is the best way for me for a few years boys to get a new job in a good place to be able and not just be the only component that has to do you appreciate the time you spend with me for the

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