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bogdanovich [222]

4 years ago

11

The experimental results could be made more valid by... 1) increasing the number of students. 2) using a plastic clothespin. 3)

using safety precautions. 4) making a bar graph of the data.

1 answer:

quester [9]4 years ago

5 0

3) using safety precautions

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HELP PLEASE ANSWER ANY OF THEM:

Leviafan [203]

The start Codon is the first mRNA

6 0

4 years ago

a german measles rubella epidemic during the years 1963 to 1965 resulted in approximately 30,000 babies being born with birth de

Juli2301 [7.4K]

Answer:

In babies born with congenital defects during the German measles rubella epidemic the specific cause of these birth defects was most likely the development of rubella virus infections in embryos.

Explanation:

Options for this question are:

<em>1. </em><em>The development of rubella virus infections in embryos. </em>

<em>2. The failure of zygotes infected with rubella to develop </em>

<em>3. Mutations in the nerve cells of pregnant females at the time of the rubella epidemic .</em>

<em>4. An increase in the amount of time needed for healthy embryonic development.</em>

Rubella is a viral infection caused by a virus of the genus Rubivirus, considered highly teratogenic during the phases of pregnancy where the embryo and the fetus are developing, that is, before 20 weeks of gestation.

<u>The virus is transferred to the embryo or fetus by the mother's blood, acquiring the disease</u>, which can cause abortions or visible malformations at birth, which is called <u>Congenital Rubella Syndrome</u> (CRB).

CRB is responsible for producing cardiovascular, renal, neurological malformations, loss of vision or hearing, problems that German children born during the epidemic probably had.

Learn more:

Congenytal rubella brainly.com/question/2107536

3 0

4 years ago

The data table above includes the distance each planet is from the sun. Students in an Earth science class were asked to explain

Serga [27]

Student 4

Explanation:

The sun has less gravitational pull on Neptune because it is farther away. Gravity is the force by which a planet or other body draws objects towards its center.
Gravity keeps all the planets in its position and allows it to move in its orbit.
The force of gravity is inversely proportional to the distance between two objects.

So when the distance increases, the force weakens. Since Neptune approximately 4.8 billion kilometers away from the sun, its gravitational force is very less.

5 0

3 years ago

1) What is the difference between regular and diffuse reflection?

Sedbober [7]

Explanation:

Regular reflection happens when light reflects off an awfully smooth surface and forms a clear picture.

Diffuse reflection happens when light reflects off a unpleasant surface and forms a hazy picture or no picture at all.

6 0

3 years ago

Which contraceptive method is 100 percent effective at preventing pregnancy?

emmainna [20.7K]

The correct answer is D. Abstinence

Explanation:

A contraceptive method or birth control method refers to a method used to avoid pregnancy or reduce the probability of getting pregnant. From antiquity, there have been different contraceptive methods but only in the last decades, methods have been designed based on science and its effectiveness has been studied.

Because of this, nowadays there are many contraceptive methods such as pills, condom, and implants that are about 80% to 95% effective, sterilization that is a around 98% effective and natural methods that have a lower percentage of effectiveness. But the only method that has been proven as completely effective or 100% effective is abstinence because by avoiding any type of sexual intercourse it is virtually impossible an egg can be fertilized by a spermatozoid.

7 0

4 years ago