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3 years ago

Name the parts of the digestive system which acts like a speed bump to control the movement of food in our alimentary canal.

Biology

1 answer:

rosijanka [135]3 years ago

4 0

Answer:

circular folds

Explanation:

The movement of food in the body's alimentary canal (the passage of food from the mouth towards the anus) is aided by "peristalsis."

"Peristalsis" is an involuntary movement of the circular and longitudinal muscles found within the digestive tract. This movement occurs in the esophagus, stomach and small intestine.

Along the jejunal intestinal wall are the "circular folds." These folds are thick and stretches towards the "lumen." They function as speed bump control by slowing down the food passage and increasing the surface area necessary for absorption. After being absorbed, they will then be moved forward toward the large intestine.

So, this explains the answer.

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(c) Based on the data in Table 1, describe why the dominant alleles for body color and wing shape are the alleles that produce a

Brrunno [24]

Answer:

Check the explanation

Explanation:

Consider the below table of F2 data of phenotypic flies: we can reconstruct the table as seen in the second attached image below:

From the above observations it is clear the Gray body long wings and Ebony body vestigial wings are the parental combinations and that the Gray body vestigial wings and Ebony body long wings are the recombinants.

Also the ratio indicates that Gray body is dominant over ebony body and that long wings is dominant over vestigial wings.

here the genes for the two characters have shown independent assortment which means that the genes are unlinked if located on the same chromosome or are located on different chromosomes.

Now F1 hybrid= GgLl (G for Grey and L for Long)

Cross between F1 hybrid and true breeding Gray vestigial (GGll)

GgLl x GG ll

Gametes-----------> GL Gl gL gl Gl

GL Gl gL gl

Gl GGLl GGll GgLl Ggll

(Gray long) (Gray vestigial) (gray Long) (Gray vestigial)

Therefore the probability of getting the flies with gray body vestigial wings= 2/4= 50%

b) The reason why the students obtained the above given F2 results involving a cross between true breeding Gray body and long wings with true breeding Ebony body and vestigial wings is that the genes for the two charcters asssort independently in F2 generation and that the genes are not linked as:

Parents------------------> GGLL x ggll

Gametes -----------------> GL gl

F1---------------------> GgLl (Gray long but in heterozous condition)

Now GgLl x GgLl

Gametes GL Gl gL gl GL Gl gL gl

Here gametes assorted independently and hence in F2 generation we got the above results (U can show the results in the form of punnett square.

4 0

3 years ago

DNA fingerprinting bands are also referred to as

Leni [432]

I am no expert but I think the correct answer is C.

3 0

3 years ago

Read 2 more answers

Other scientists hypothesize that organic compounds could have come to Earth_____.

ioda

Other scientists hypothesize that organic compounds could have come to Earth when the stars collided and the debris fell to Earth. B

HOPE THIS HELPS! ^_^

8 0

3 years ago

Using ideal ATP production numbers, how many ATPs would an individual generate if he or she consumed only pyruvate and carried o

IrinaK [193]

Answer: The ATP(Adenosine Triphosphate) that will be generated if one pyruvate molecule is carried through cellular respiration is 36.

Explanation: Pyruvate is formed through glycolysis cycle which breaks down glucose. The pyruvate is used in aerobic cellular respiration via the TCA cycle yielding 2 ATPs and the electron transport system yielding 34 ATPs. That makes it up to a total of 36 ATPs.

8 0

3 years ago

WHO CAN HELP 20 pys⭕️

zubka84 [21]

The mother has a 50% chance of having a child with that condition. Hope my work helps!

4 0

2 years ago