BIOLOGY HIGH SCHOOL

Evolution of a species could occur as a result ofchanges in the
(1) DNA in muscle cells
(2) base sequences in liver cells
(3) genes in an egg cell
(4) number of chromosomes in a fetal bone cell

Answers

Answer 1
Answer: It is due to changes of genes in an egg cell

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At some point in their lives, all chordates have a flexible supporting rod in their backs called a

Answers

The right answer is notochord.

La chorde (ou notochorde), issue du mésoderme axial, est une structure embryologique cartilagineuse, spécifique de l'embranchement des Chordés (Chordata), auquel appartiennent notamment les Vertébrés (Vertebrata).

Elle constitue une sorte de baguette rigide mais flexible, formée de grandes cellules et située dorsalement entre le tube neural et le tube digestif. Elle est également un important centre de signalisation, produisant notamment la protéine Shh qui permet la formation du sclérotome à partir des somites ou « mésoblaste dorsal » (et donc les vertèbres) et la mise en place de l'axe dorso-ventral du tube neural.

La chorde est entourée de somites qui sont pleins et métamérisés.
The notochord is a flexible rod made out of a material similar to cartilage. If a species has a notochord, it is, by definition, a chordate.

Please Help (: Mitosis and meiosis are similar processes, but they have some very important differences. Explain how mitosis and meiosis are alike and how they are different. Provide at least two similarities and three differences.

Answers

Mitosis is a four-stage process that creates two identical cells from one original cell. In Mitosis chromosome the cell divides intotwo identical sets daughter nuclei. in mitosis the mother cell divides into two daughter cells which are genetically identical toeach other and to the parent cell.Meiosis is a reduction cell division where the number of chromosomes is divided into half. In Meiosis it gametes formationsoccur in animal cell and meiosis is necessary for sexual reproduction. The meiosis has 6 phase: Meiosis I, Prophase I ,MetaphaseI, Anaphase I, Telophase I, Meiosis II

If a yeast cell is exposed to conditions that limit the amount of oxygen available, what is the most likely result

Answers

Aerobic respiration is the kind that occurs when there is a non limiting supply of oxygen; anaerobic respiration occurs when there is a limiting supply of oxygen...

Yeast cells can ferment, so they can grow in the absence of oxygen. This is important in the process of alcoholic fermentation to make wine and beer.

Answer:

fermentation will take place to produce low levels of ATP..lmk if i helped ya byeeeeeeeeee

Explanation:

Proteins may act as buffers because the free carboxyl group can release hydrogen ions. A) The free carboxyl group can combine with hydrogen ions.
B) The free carboxyl group can act as a base.
C) The free amino group can release hydrogen ions.
D) The free amino group can act as an acid.

Answers

Answer: a. The free carboxyl group can combine with hydrogen ions.

Explanation:

Hopefully this helped :)

Answer:

The answer is A.

What fish has a light on its face?

Answers

The "fishing rod" growing from the female anglerfish's snout ends in a glowing blob of light.

What does Figure 13–2 show?A. anticodons
B. exons
C. introns
D. the genetic code

Answers

Figure 13-2 shows D.the genetic code.
Exons and introns are found in RNA, not DNA, so B and C are incorrect. There are no anticodons in the picture, so A is also incorrect, which leaves us with D.
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