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2 years ago

BRAINLIEST!! According to embryology, why do fish and birds have a common ancestor?

Biology

2 answers:

Blizzard [7]2 years ago

5 0

Answer:

Both fish and bird embryos exhibit gill slits and a tail.

Explanation:

According to embryology, all vertebrates exhibit similar traits and structures at their embryonic stage. It becomes very difficult to differentiate between the embryos of a fish, and that of a bird, or embryo of a fish, and a human. These traits, however, disappear, as the case may be, as the embryo develops into an adult. For example, in the case of the embryo of a fish, and a bird, both shows gills slits at their respective embryonic stage. However, the gill slits in fish develop into gills, whereas in the case of birds, it disappears as the embryo develops into an adult.

krok68 [10]2 years ago

3 0

Answer:

A, They both have embryos with gill slits and tails.

I learned it and took the quiz on edge2020(i got 100% so trust me)

this is the correct answer.

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Why do ppl have to be so annoying

Cloud [144]

Answer:

probably because it’s either these 5 things; they want attention, they’re bored and whatever they’re doing is fun, they don’t know what’s annoying and what’s good, it’s none of these things, or its all of these things.

Explanation:

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2 years ago

Read 2 more answers

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

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2 years ago

10 POINTS QUESTION: Objects of different masses are suspended from a height. Which combination of features will have the greates

mrs_skeptik [129]

Answer:

A. high mass and high height

Explanation:

:))

Do good on your work!

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2 years ago

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xxMikexx [17]

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2 years ago

A health magazine contacts you for your expert opinion on what measure best describes the amounts of nutrients that should be co

emmainna [20.7K]

Answer:

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2 years ago