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NikAS [45]
3 years ago
8

What is speciation a result of

Biology
1 answer:
erik [133]3 years ago
3 0

The first one is correct

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Which process is a squeezing motion of the circular layer of smooth muscle in the small intestine?
Over [174]

Segmentation is a squeezing motion of the circular layer of smooth muscle in the small intestine.

<h3>What is segmentation in the small intestine?</h3>

Segmentation, which mostly affects the small intestine, is made up of localized contractions of the Gastro-Intestinal tract's circular muscle. These contractions separate out little portions of the intestine, allowing their contents to move back and forth while being continuously divided, broken up, and mixed.

Our intestines' circular muscles contract during segmentation to churn food back and forth, rather like a washing machine. This churning helps break down food into tiny bits for digestion by allowing it to mix with gastric secretions in the intestines. By bringing chyme into contact with the intestinal walls during segmentation, the technique also helps to increase absorption.

Learn more about segmentation here:

brainly.com/question/2133778

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4 0
1 year ago
What evidence in a slice of bread showed the presence of gas?
LenaWriter [7]

Every slice of the bread, contains a number of blister like pores. These blister like pores suggests that the air or some gas might be present there. In case, the bread has no air, the surface of the bread must be smooth rather than rough.

The bread is formed by the fermentation of the sugar molecules present in the dough with the help of yeast. These blisters like structure on the bread is present due to the gas produced during fermentation.

6 0
2 years ago
PlsHelp!!!!!!!!!!!!!!!!!!!!!!!!!
Troyanec [42]

Answer:

#male gametes are formed

#generative nucleus divides

#fertilization takes place

#pollen tube grows

# zygote is formed

#embryo is formed

6 0
2 years ago
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Why is 3 the correct answer to number 4 ? Explain why please and answer this !!
Alinara [238K]
Maybe it’s because in order the get the same apple you breed more of that apple? It would take less time than natural selection since the genes of that certain apple may not appear for a few generations. If this makes any sense let me know because I’m just as confused as you are.
8 0
3 years ago
In horses, the allele for a black coat (B) is dominant over the allele for a brown coat (b). A cross between a black horse and a
GaryK [48]

Answer:

Bb X bb

Explanation:

  • It is given that the allele B for the black coat is dominant over allele b for a brown coat.
  • A dominant allele always leads to the expression of the dominant trait in the heterozygous condition. 
  • When a black and brown horse is crossed as given in the question and the result is a brown foal, then the genotype of the brown foal must be bb as the brown coat is a recessive trait. 
  • Since each parent contributes one allele each for a given gene, the black horse must have b allele, and hence must be heterozygous Bb.
  • The cross is shown in the punnett square.

4 0
2 years ago
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