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djyliett [7]
3 years ago
11

Ling is devising a checklist to predict a female child's reaching puberty early. which is not a question he should include in hi

s list?
Biology
1 answer:
jeyben [28]3 years ago
5 0
I found the exercise on the internet and these were the options:
"A)Did this girl grow up in a single-parent mother-headed family?
B)Was this girl insecurely attached?
C)Did this girl have a stressful childhood?
D)<span>Does this girl have many siblings?"

Correct answer: D
The number of siblings is not a factor that promotes early puberty in girls. All the other factors do have an impact although the mechanisms are yet not very well known. When there is not a father figure present, girls tend to reach puberty earlier. When they are insecurely attached to their mother, girls also tend to reach puberty earlier. Lastly, another factor that may lead to an earlier puberty in girls is the stress they've passed through during childhood - mostly from family conflicts, whether with parents or siblings.</span>
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Complete the Punnett square for the following cross-pollination and give the genotypic and phenotypic ratios: for white (WW) and
hammer [34]

Answer:

Phenotypic ratio= 1:1

Genotypic ratio = 1:1

Explanation:

This is a monohybrid cross involving a single gene that specifies a color phenotype.

According to the question, WW, which is homozygous dominant i.e same allele is white while ww, which is homozygous recessive is black.

Hence a genotype Ww will possess a white phenotype since the W allele will mask the expression of w.

In a cross between a female and male with a a Genotype Ww and ww respectively. The parents alleles will be separated into gametes according to Mendel's law of segregation. (See attached image).

Ww will produce gametes W and w

ww will produce gametes w and w

The four possible offsprings will have Ww (2) and ww (2) genotypes. Hence two of them will be white while two will be black.

Hence, the phenotypic ratio will be 1:1 while the genotypic ratio will also be 1 Ww: 1 ww

3 0
4 years ago
Squamous epithelium, sperm cells, smooth muscle, or human red blood cells:
polet [3.4K]

Answer:

1. sperm cells: cell has a flagellum for movement

2. smooth muscle: cells have an elongated shape (tapered at each end)

3. Squamous epithelium: cells are close together

4. Human red blood cells: cells are circular

5. Squamous epithelium cells are thin and flat, with irregular borders

6. Human red blood cells: cells are anucleate (without a nucleus)

7. smooth muscle: longest cell

Explanation:

  • <em>Sperm cells</em>: Active and morphologically specialized cells. They characterize as having an elliptic head mostly occupied by the nucleus, and a tail of about 55 micrometers that moves impulsed by a motor dynein protein that uses ATP energy.
  • Smooth muscle cells: Fusiform cells. Long and tapered at the extremes. Located in organs and viscera, and in vessel walls, where involuntary maintained slow contractions are needed. Although they are the longest cells, their length depends on the organ where they are located. They might reach up to 500 microns.
  • Squamous epithelium cells: The wide and length of the cells supere their height. Some of them suffer a process of keratinization from being exposed to dehydration and touch.  
  • Red blood cells: Red blood cells or erythrocytes are biconcave disks-shaped, with no nucleus, and very small. These are flexible cells that might move along in the smallest capillaries. Hemoglobin provides the typical red color. The red blood cell size and number vary among species.
4 0
3 years ago
Simulate a 24-hour day (12 hours of light, 12 hours of dark). How many snails
Igoryamba
The hours of daylight and dark time depends on where you are but how many snails and plants it takes to keep a stable environment my guess would be a few thousand snails and a couple thousand plants and also they have to be different kind of plants of so they can benefit from each other all around.
3 0
3 years ago
How can you tell the relative ages of rock layers?
Dovator [93]

Answer:

Its difficult to determine the absolute age so geologists use method to find a rock's relative age. Use the: LAW OF SUPERPOSITION: in horizontal sedimentary rock layers, the oldest layer is at the bottom. Each higher layer is younger than the layers below it.

Explanation:

(Rockaway Middle School, Relative Ages Of Rocks)

4 0
3 years ago
Are scallops decomposers?
pickupchik [31]

Answer:

Yes they are.

Explanation:

also reminder to be happy drink water u are loved :). <3

5 0
3 years ago
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