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aev [14]
3 years ago
12

n the modern classification system birds are in a separate _______ from reptiles, but fossil evidence shows they have __________

_.
Biology
2 answers:
lisov135 [29]3 years ago
8 0
Separate kingdoms but fossil evidence shows they have evolved from a common ancestor
DiKsa [7]3 years ago
3 0

Answer:

N the modern classification system birds are in a separate group from reptiles, but fossil evidence shows they have the same ancestry.

Explanation:

It is true that birds and reptiles are classified in different groups, since they present different anatomical, structural and biological differences, however these animals have several similarities, since they probably descend from the same ancestor.

It is well accepted in the scientific community that birds emerged from groups of dinosaurs, that is, that birds and reptiles were formed by the same ancestor. For many scholars, for reptiles to become a valid group, birds should be part of that group, but it was decided that mantles would be better in different groups.

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Fertilization of an egg by sperm takes place in the
MArishka [77]

Answer: Oviduct

Explanation:

The oviduct also known as the Fallopian tube is a long narrow tube with funnel shaped opening which receives eggs (Ova) released by the ovary. So, the oviduct link the ovary with the uterus, and it is the site where sperm released from the male meet the egg to fertilize it into zygote.

Thus, oviduct is the answer

5 0
3 years ago
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Detail the locations and fate of a glucose molecule in a French fry from the time you swallow it until it gets turned into CO2 a
sesenic [268]

Answer: the glucose is a weird circle thing and a french fry is a food.

Explanation: not really understanding the question here...

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2 years ago
What is an engineer goal and what does he or she need to meet that goal?
vampirchik [111]
HI i was wondering 1 what engineer choice you are going for and two if this is what you mean. study hard to to bed early and make class . (im saying this becasue i have done it before :])

4 0
3 years ago
In this week's experiments, if you replaced glucose with the monosaccharide fructose, predict the results for fructose transport
lbvjy [14]

Answer: Fructose is transported by facilitated diffusion.

Explanation:

Glucose is a monosaccharide with the molecular formula C6H12O6.3 It is a hexose. It is a form of sugar that is found freely in fruits and in honey. Its energy yield is 3.75 Kcal/g under standard conditions.

Fructose is a type of carbohydrate found in vegetables, fruits, and honey. It is a monosaccharide with the same molecular formula as glucose, C6H12O6, but with a different structure, that is, it is an isomer of glucose. Its energetic power is the same as that of glucose, 4 kilocalories per gram, and it is a reducing carbohydrate.

Glucose is the main energy substance of a cell and for its entry  it requires a transport protein in the cell membrane, called transporter. The transport of glucose through the cell membrane is carried out by two families of membrane proteins:

  • Sodium-coupled glucose transporters (SGLT sodium-glucose-transporters), which involves the co-transport of Na+ by the SGLT-1 by maintaining the Na+ gradient thanks to the Na+/K+ pump
  • Glucose transport facilitation proteins (GLUT)

On the other hand,  fructose is absorbed by another type of transporter, called Glut-5, a protein that crosses the membrane 12 times. Finally, the passage of both glucose and fructose into the blood takes place through the Glut-2, a transporter with low affinity and high transport capacity.

If any Glut is considered within the context of a large family of proteins, it can be immediately noticed that they all possess common characteristics that in biochemical terms are called "molecular signature of glucose transporters" and that it is no more than a set of extremely conserved primary amino acidic sequences that determine secondary and tertiary structures (domains or motifs) that are responsible for the functional characteristics of the protein.

<u>Facilitated diffusion is a type of cellular transport where the presence of a carrier or transporter (integral protein, Glut is this example</u>)<u> is necessary for substances to cross the membrane.</u> It happens because the molecules are larger or insoluble in lipids and need to be transported with the help of membrane proteins. So, in the first step, fructose binds to the transport protein, and this changes shape, allowing the passage of this sugar. In this way, fructose concentrations inside the cell are always very low, and the external and internal concentration gradient favours diffusion.

Summarizing, fructose is transported by facilitated diffusion. So if we replaced glucose with fructose we would have seen no change in each conditions. And since fructose is transported by this type of mechanism, there is not a concentration gradient.

6 0
3 years ago
Would an amphibian that lacks lungs and breathes entirely through its skin likely be larger or smaller than an amphibian that ha
Ymorist [56]

Answer: .D. Smaller because its smaller surface area to volume ratio would allow it to breathe sufficiently through its skin alone.

Explanation:

7 0
3 years ago
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