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3 years ago

In the case of the bombina frogs given in your text, there was evidence of hybridization because

2 answers:

5 0

In the case of the Bombina frogs, the evidence that hybrid zone stability is occurring was the consistent pattern from annual to annual of declining frequency of yellow-bellied toad alleles with distance from the edge of their range. This is a clear evidence that hybridization is taking place yearly in the Bombina frogs.

Whitepunk [10]3 years ago

3 0

Answer:

On account of the Bombina frogs, the proof that half and half zone.

Explanation:

strength is happening was the steady example from yearly to yearly of declining recurrence of yellow-bellied frog alleles with separation from the edge of their extend. This is an unmistakable proof that hybridization is occurring yearly in the Bombina frogs.orbital hybridisation is the idea of blending nuclear orbitals into new half and half orbitals appropriate for the matching of electrons to shape synthetic bonds in valence bond hypothesis.

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A certain buffer is made by mixing a weak acid HA and its conjugate base A–. When HA is present at a concentration of 0.5 mM and

MAVERICK [17]

Answer:The ratio of the concentrations of $HA$ and $A^-$ when the buffer has a pH of 7.02 is 0.69

Explanation:

The dissociation constant for formic acid = $K_a=1.8\times 10^{-4}$

Concentration of HA= 0.5 mM

Concentration of $A^-$ = 0.1 mM

pH = 6.16

First we have to calculate the value of $K_a$ .

Using Henderson Hesselbach equation :

$pH=pK_a+\log \frac{[A^-}{[HA]}$

Now put all the given values in this expression, we get:

$6.16=pK_a+\log (\frac{[0.1]}{0.5})$

$pK_a=6.86$

To calculate the ratio of the concentrations of $HA$ and $A^-$ when the buffer has a pH of 7.02.

Using Henderson Hesselbach equation :

$7.02=6.86+\log \frac{[A^-]}{[HA]}$

$\frac{[A^-]}{[HA]}=1.44$

$\frac{[HA]}{[A^-]}=0.69$

Thus the ratio of the concentrations of $HA$ and $A^-$ when the buffer has a pH of 7.02 is 0.69

7 0

3 years ago

1. After mitosis in animals, cytokinesis takes place. What happens during cytokinesis?

il63 [147K]

The correct answers are as follows:
1. During cytokinesis, THE CELL MEMBRANE PINCHES IN TO FORM TWO NEW CELLS.
Cytokinesis is the physical process of cell division, it divides the cytoplasmic content of the parental cell into two new daughter cells. Cytokinesis takes place in both mitosis and meosis.
2. The correct order of the phases of mitosis are as follows: PROPHASE, METAPHASE, ANAPHASE AND TELOPHASE.
Mitosis is the process of cell division by which a cell is divided into two new cells. The process occurs in four basic stages and result in the formation of two new cells.
3. The following terms are related to sexual reproduction: MATING SYSTEM, GAMETE FORMATION AND AMPLEXUS.
Amplexus refers to the mating positions of frogs and toads during sexual reproduction. Mating system refers to the number of mating partners that an animal has during the mating period. Gamete formation is the process by which sex cells are made and it occurs in both male and female animals.
4. As a cell is preparing to divide by mitosis, the DNA MUST BE COPIED.
When a cell is getting ready to divide by mitosis, it will undergo a stage called interphase, during which the cell prepare for cell division. During interphase, the cell undergo some process and these include the copying of the DNA. The cell copies its DNA so that it has two copies of each strand.

7 0

3 years ago

Dan is an overweight, middle-aged history professor who snores loudly and periodically stops breathing during sleep. dan has a c

Murrr4er [49]

Dan has sleep apnea ...

6 0

3 years ago

lorasvet [3.4K]

Answer:

well you see its b

Explanation:

its just b

4 0

2 years ago

Which of the following does not not help your body maintain homeostasis

anyanavicka [17]

A. jogging would be the answer

3 0

3 years ago