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svlad2 [7]
3 years ago
10

Scientists have created trains that use magnets to make the trains float above the tracks as they travel. These trains float bec

ause
(a) the track is waxed (c) the like poles repel
(b) the train has a low density (d) a chemical change occurs
Biology
1 answer:
Arada [10]3 years ago
7 0

Answer:

the poles repel

Explanation:

i believe this is the best answer

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Four Students were having a discussion about how scientists do their work. This is what they said... Antoine: "I think scientist
stepan [7]

Answer:

Please see below  

Explanation:

Between all these kids carrying out this discussion, Tamara is the closest to guessing what scientists do. There is indeed a definite set of steps that scientists undertake in order to conduct science experiments. The scientific method is as follows:  

  1. observation
  2. measurement
  3. experiment
  4. testing the hypothesis
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4 years ago
Can someone help me find the words>?
andrew11 [14]

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3 years ago
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One of your brother's friends, Dylan, is unusually short with a stocky build; has a flat face, a large tongue, and an extra fold
Oksanka [162]

Answer:

Dylan likely has Down Syndrome /  21 Trisomy Syndrome.

Explanation:

Down Syndrome is a genetic disorder in which the person has an extra copy of chromosome 21, this is why the disorder is known as Trisomy 21.  This extra copy changes how the body and the brain develope, which can cause mental and physical problems.

Children with this disorder usually have a low intellectual level, the most frequent cause of identifying mental delay of genetic origin.

Some of the characteristics of these children are slight diminution in the skull size, almond-shaped eyes, a short neck, small ears, a small mouth, a <u>large tongue</u> tends to get out of the mouth, <u>narrow auditive conduct</u>, tiny hands, and feet, weak muscular tone, and they are <u>usually short in height. </u>

There are also some medical problems such as <u>hearing loss</u>, apnea, ear infections, ocular problems, <u>heart defects</u>, intestinal malformations, hypothyroidism, hip dislocation, anemia, among others.

8 0
3 years ago
The higher the ____ content of a dna, the ____ the strength of the interchain interactions, and the ____ the melting temperature
castortr0y [4]

The higher the GC content of a DNA, the higher the strength of the interchain interactions, and the higher the melting temperature.

DNA is Deoxyribonucleic Acid. It is the genetic material in maximum of the organisms. The DNA is a polymer made from nucleotides (sugar, nitrogenous bases and phosphate group). It is composed of two strands of phosphate and sugar backbone in an antiparallel direction. The nitrogenous bases present in DNA are Adenine (A), Thymine (T), Guanine (G) and Cytosine (C).

GC content refers to the total amount of Guanine and Cytosine present in the DNA. Since there exists a triple bond between G and C, more percentage of them provides strength to DNA. That is why high GC content denotes high melting temperature of DNA.

To know more about DNA and GC content, here

brainly.com/question/13052467

#SPJ4

3 0
2 years ago
One common structure found in both prokaryotic and eukaryotic cells is (an)
nasty-shy [4]

Answer:

a. ribosome

Explanation:

Ribosome -

The ribosome is common in both the cells of eukaryotes and prokaryotes .

Ribosomes acts as a site for protein synthesis .

Ribosomes are present even on the endoplasmic reticulum  .

They link the amino acids with the messenger RNA molecules , which is used for the sequencing of the amino acid to obtain proteins .

The amino acids are carried with the help of the tRNA molecules .

hence , the correct answer for the given information is ribosome .

7 0
3 years ago
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