ONE QUICK PHYSICAL SCIENCE QUESTION 1. Why isn’t it possible for an atom to have a mass number of 15 and an atomic number of 18?

Answers

Answer 1
Answer: Anatom with an atomic number of 12 has 12 protons. Because the massnumber is the sum of the protons and neutrons, the mass number wouldneed to be at least 12. I hope this helped!


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What is a tabular key?

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tabular key is having the form of a thin plate or scale

What would happen to a living cell if it was unable to transcribe messenger RNA (mRNA)?A. The cell would produce proteins that were folded improperly.
B. The cell would be unable to produce the proteins needed for life.
C. Nothing, the cell would still be able to function normally.
D. The cell would divide uncontrollably forming a tumor.

Answers

Answer:

B

Explanation:

Because transcription is the process that provides the vital information for a cell too make proteins. If a cell couldn't do that, then no proteins can be produced.

An embryo develops in the
uterus. < my answer
cervix.
ovary.
vagina.

Answers

Answer: The correct answer is -

uterus.

Explanation:

The development of embryo ( that is stage from second to eighth week after fertilization) takes place in the womb of mother, which is referred as Uterus.

After fertilization of egg, the zygote (fertilized egg) undergo divisions and forms a ball of cells called blastocyst, which eventually implants in the uterine wall (approximately one week after fertilization) and remains there for complete development till birth.

Thus, uterus is the right answer.

Answer:

A-uterus

Explanation:

got it right on my test

In the study of cancer, researchers have used different types of cells, different environmental conditions, and different experimental designs. But, all researchers have arrived at the same conclusion. Which conclusion is that?Cancer cells stop dividing when they touch.
Cancer cells are unspecialized cells.
Cancer cells lack contact inhibition.
Cancer cells reproduce slowly.

Answers

cancer cells lack contact inhibition meaning meaning that in normal cells when they come in to contact with other cells they stop reproducing only cancer cells do not. They just keep reproducing and growing destroying everything in their path. An example of this is a tumor. 

Answer:

C. Cancer cells lack contact inhibition

Explanation:

If an animal has long canine teeth and sharp molars it is probably aa. carnivore.
b. rodent.
c. deer.
d. herbivore.

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it is a carnivore because a carnivore eats meet and the long canine teeth and sharp molar helps it to capture its prey well
If an animal has long canine teeth and sharp molars its probably a carnivore

Mitosis and meiosis similarities

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The alternation of generations in the life cycle of a plant includes the diploid and haploid multicellular stages. diploid and haploid are copies of the chromosomes. The spores in the plant is unicellular and when they start dividing through mitosis, it produces identical cells. These identical cells are all haploid. Haploid stages contain one set of chromosome from either of the parent. These identical cells create a multicellular system called the gametophytes. A gametophyte is the haploid multicellular stage in the life cycle of a plant. The gametophyte makes the gametes. These gametes are responsible for sexual fertilization. It takes place when a sperm (male gametes) from the male fuses into the egg cell (female gametes) of the female. The formation of both male and female gametes creates a diploid zygote. Diploid stages contain one set of chromosome from each parent. This is where the sporophyte comes in. A sporophyte is the diploid multicellular stage in the life cycle of the plant. It now contains the two sets of chromosomes from each parent.

The type of cell division that produces gametes with half the normal chromosome number is the meiosis. Meiosis is the type of cell division used in sexual reproduction. It will occur in the testes and ovaries.