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Olenka [21]
3 years ago
10

When air gets warm does it sink or rise?

Biology
1 answer:
stiv31 [10]3 years ago
4 0
Air rises when it is warmer
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These particles make the nucleus of the<br> atom stable
Radda [10]

Answer:

An atom is stable if the forces among the particles that makeup the nucleus are balanced. An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy. Instability of an atom's nucleus may result from an excess of either neutrons or protons.

Explanation:

4 0
3 years ago
Mitosis and meiosis always differ in regard to the presence of a. chromatids. b. homologs. c. bivalents. d. centromeres. e. spin
Fantom [35]

Answer:

c. bivalents.

Explanation:

In Meiosis a bivalents are formed during the first stage of meiosis which is the prophase. The bivalent consist of a paired chromosome and four chromatids i.e two chromosomes in a tetrad. one chromosome comes from each parent.

In mitosis, a bivalent is not formed. There is the presence of chromatids, homologs, centromeres and spindles during mitosis and meiosis.

5 0
3 years ago
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In order to use a Punnett, square we must know the ___________ of an individual
egoroff_w [7]
  <span>The genotype is required for you to use a punnet square. In the construction of a punnet's square, the genotypes of both parents are required. In the three by three square, the first column shows the genetic representation of one parent and the first row shows the genotype of the other parent. The two are combined, and they yield a genetic combination of both parents, giving all the possible outcomes of the offspring's genotypes. Using the punnet's square, you can be able to identify the percentage of the offspring that will be heterozygous or homozygous.</span>
4 0
3 years ago
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How does gene flow directly contribute to evolution? I'll mark brainliest
kifflom [539]

Answer:

The correct answer is - B. It introduces new alleles into a population.

Explanation:

Gebe flow or migration is the transfer of the genetic material or transfer of genes from one population to another population of the same species. Gene flow is also responsible for the genetic change that leads to evolution.

Gene flow can contribute in various ways such as migration or vertical gene transfer parent to progeny, however, it can lead to evolution directly by introducing new alleles into a population.

7 0
2 years ago
Which compound is a reusable, complex protein that speeds up chemical reactions?
Irina-Kira [14]
Hello there! 

The answer is enzymes. 
Enzymes are biological catalysts, which means they decrease the amount of activation energy needed to start a reaction, therefore speeding up the rate of the reaction. They are part of the protein macromolecule group. Without them, our bodies would not process things efficiently or fast enough for us to live.

Hope I helped. Have a nice day.

5 0
3 years ago
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