BIOLOGY HIGH SCHOOL

Valence is the number of electrons an atom must gain or lose in order to _____ its outer energy level or have a stable octet in its outer shell.complete
lose
gain

Answers

Answer 1
Answer: The correct answer is complete.

Valence is the number of electrons an atom must gain or lose in order to complete its outer energy level or have a stable octet in its outer shell. In the first energy level it can have only 2, but later levels can have 8, that is, an octet.
Answer 2
Answer:

Answer;

Complete

Valence is the number of electrons an atom must gain or lose in order to complete its outer energy level or have a stable octet in its outer shell.

Explanation;

-Valency is the number of electrons that an atom requires to gain or lose to form a complete configuration or an octet configuration.

-Atoms tend to lose or get electrons in order to achieve the electronic arrangement of atoms of the noble gases. An ion is an atom or group of atoms having an overall electrical charge. Atoms gain electrons to form cations (positively charged atom), while other lose to form anions (negatively charged atoms).

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The ________ contains lobules with sinusoids (lined with macrophages. that lead to a central venous structure.A. liver B. spleen C. pancreas D. stomach
Bio homework help :)?Two populations of birds with somewhat different coloration live on opposite sides of a peninsula. The habitat between the populations is not suitable for these birds. When birds from the two populations are brought together, they produce young whose appearance is intermediate between the two parents. These offspring will breed with each other or with birds from either parent population, and all offspring of these pairings appear intermediate to various degrees. (use to answer Q 1.) 1.What keeps the two populations separate? behavioral reproductive isolation temporal reproductive isolation lack of hybrid viability spatial reproductive isolation They are already separate species. 2. Three populations of crickets look very similar, but the males have courtship songs that sound different. What function would this difference in song likely serve if the populations came in contact? a postzygotic isolating mechanism b prezygotic isolating mechanism c gametic reproductive isolating mechanism d behavioral reproductive isolating mechanism e two of the above 3. The peppered moth provides a well-known example of natural selection. The light-colored form of the moth was predominant in England before the industrial revolution. In the mid-nineteenth century, a dark-colored form appeared. The difference is produced by a dominant allele of one gene. By about 1900, approximately 90% of the moths around industrial areas were dark colored, whereas light-colored moths were still abundant elsewhere. Apparently, birds could readily find the light moths against the soot-darkened background in industrial areas and therefore were eating more light moths. Recently, use of cleaner fuels has greatly reduced soot in the landscape, and the dark-colored moths have been disappearing. Should the two forms of moths be considered separate species?a. Yes, because natural selection has affected the frequency of the two different forms.b. Yes, because they have completely different coloration.c. Yes, because they are reproductively isolated based on habitat.d. Yes, because they have completely different coloration and natural selection has affected the frequency of the two different forms. e. No.
Of all of the biomes, this is where you will find the large, ground-dwelling megafauna. this biome is characterized by tall grasses and some scattered trees.
Which is the result of breeding individuals of different parentage?genetic diseasehybrid vigorgenetic engineeringnatural selection
Organisms made up of one or more cells with complex internal structure are called

A(n) ______ is a large-scale category containing many communities of a similar nature, and its location is largely controlled by climatepopulation
ecosystem
biome
none of the above

Answers

biome

A biome is a large-scale category containing many communities of a similar nature, and its location is largely controlled by climate


NOT:
population
ecosystem
none of the above

What would happen to a bacterial cell if its protective covering was destroyed?

Answers

If the protective layer of a bacteria, i.e., its membrane is destroyed, then the cellular contents of the bacteria will come out, and the bacteria will die. The membrane maintains the integrity and fluidity of a cell. No membrane, no bacteria.

Which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving? A: a 50kg couch

B: a 5kg dining chair

C: a 75kg dining table

D: an 10kg end table

Answers

Answer: The correct option is C.

Explanation:

Inertia is a property of the matter by virtue of which it resists any change in its state of rest or motion. Inertia is directly related to the mass of the matter.More the mass more would be the inertia and harder would be for an object to change its state.

Thus the furniture which faces most difficulty in moving is 75 kg dinning table due to its greater mass. Therefore more force would be required to push the table. And hence it has greater inertia.

The answer is C) 75 kg dining table :)

List four types of stem cells

Answers

Embryonic stem cells, adult stem cells, induced pluripotent stem cells, and mesenchymal stem cells

The four types of stem cells are

 1. Embryonic Stem cells

2. Mesenchymal stem cells

3. Adult Stem Cells

4. Induced Pluripotent Stem cells

Catfishing is posting inflammatory remarks online to generate negative responses.(1 point)True False

Answers

Answer: That is false

Explanation: Catfishing is a deceptive activity where a person creates a  fake identity on a social network account.

Differentiation continues to divide to produce more and more cells without limits.

Answers

The believe the answer is true but I'm not completely sure.  
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