All categories

2 years ago

Dogs have a reduced nonfunctional digit on their paws known as a dewclaw. What is this an example of?

Biology

2 answers:

CaHeK987 [17]2 years ago

6 0

Answer: The correct answer is-

Vestigial structure.

Vestigial structures are the parts/ organs present in a species, which were functional in their ancestors but serve no function in them that is they are not used by the present species.

Dogs possess reduced and nonfunctional digit on their paws ( particularly located on the inner side of the front leg) called as a dewclaw. They serve no function in dogs.

Thus, dewclaw is an example of Vestigial structure

maks197457 [2]2 years ago

3 0

C. Vestigial structure is the correct answer

You might be interested in

(a) Identify the most likely mode of transport across the membrane for substance L. Explain how information provided helps deter

Viefleur [7K]

Active transport occurs against the electrochemical gradient. It needs energy to move molecules from the lower concentration side to the higher concentration side. The mode of transport is active transport. 

-------------------------------------------------

There are three main different types of transport across the membrane

Simple diffusion ⇒ Does not need energy to occur
Facilitated transport ⇒ Does not need energy to occur
Active transport ⇒ Needs energy to occur

Active transport is the transport of molecules that move against the electrochemical gradient, so it does need energy to happen.

Molecules move from the lower concentration side to the higher concentration side of the membrane.

Carrier proteins are in charge of active transport. The needed energy might proceed from the ATP molecules or the membrane's electric potential.

In the exposed example, a scientist wants to determine how substance L enters a cells in a culture.

The cells maintain a 120 mM intracellular concentration of substance L.

Varying external concentrations of substance L (10 to 100 mM) in culture medium (Table 1).

Table 1. Rate of entry of substance L into mammalian cells in culture

External concentration of substance(mM) Rate of entry of substance L

10 5%

20 25%

30 45%

40 65%

50 80%

60 90%

70 95%

80 100%

90 100%

100 100%

Now, we need to identify the most likely mode of transport across the membrane for substance L, and explain how information provided helps determine the most likely mode of transport.

We know that the intracellular concentration is 120mM.

As we can see, this concentration exceeds all of the culture media concentrations. Yet, the substance keep moving into the cell.

As the concentration inside the cell is always higher than the concentration outside, we can assume that this is not passive transport because the molecule transport is going against its concentration gradient.

Hence, the remaining option is active transport. And as said before, we can see it because the substance keeps crossing the membrane toward the cell interior despite its concentration being higher in the interior of the cell than in the exterior.

-------------------------------------------------------------

6 0

3 years ago

A person who is believed to speak for god

natulia [17]

Answer:

IM SO SORRY IF IM WRONG but i think the answer is prophets or Moses.

Explanation:

4 0

3 years ago

Read 2 more answers

In glycolysis, pyruvate, ATP, and NADH are produced. The lactic acid fermentation process uses the NADH molecule from glycolysis

jekas [21]

Answer:

Explanation:

Fermentation does not involve an electron transport system, and no ATP is made by the fermentation process directly. Fermenters make very little ATP—only two ATP molecules per glucose molecule during glycolysis. ... During lactic acid fermentation, pyruvate accepts electrons from NADH and is reduced to lactic acid.

8 0

3 years ago

Which type of bond forms between water molecules?

Firdavs [7]

The answer is hydrogen bond.

Between water molecules, hydrogen bonds can be seen, which is due to the polar nature of water.

8 0

2 years ago

Which movement of particles would be most affected by a disorder that causes damage to carrier proteins ?

Makovka662 [10]

Active transport;

The movement of particles would be most affected by a disorder that causes damage to carrier proteins is the active transport.

Explanation;

Active transport involves the movement of materials against the concentration gradient.

This type of transport requires energy in form of ATP to aid the movement of particles from a lower concentration to a higher concentration.

Active transport requires carrier proteins such as the sodium-Potassium pump, to move materials in and out of the cell.

7 0

3 years ago

Read 2 more answers