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iris [78.8K]
4 years ago
10

Which process most likely enabled the formation of the early protists?

Biology
1 answer:
sergejj [24]4 years ago
5 0

Answer:

endosymbiosis.

Explanation:

By the beginning of the 20th century, researchers thought that plastids and mitochondria could come from bacteria. These would have been ingested by primitive cells and live within them in symbiosis.

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ProblemAssume that long fingers are inherited as a recessive trait with 80% penetrance. Two people heterozygous for long fingers
Natalka [10]

Answer:

The probability that their first child will have long fingers is 20%  

Explanation:

<u>Available data</u>:

  • long fingers are inherited with 80% penetrance
  • L represents the dominant allele for short fingers
  • l represents the recessive allele for long fingers

Cross) Two people heterozygous for long fingers mate

                            Ll          x         Ll

Gametes)    1/2 L    1/2l         1/2L    1/2l

Punnet Square)  

                               L         l

                     L      LL      Ll

                       l     Ll       ll

F1) 25% or 1/4 LL

     50% or 1/2 Ll

     25% or 1/4 ll

Long fingers are inherited with 80% penetrance, which means that 80% is the proportion of the population that expresses the phenotype long fingers. Hence, the probability that the first child in this cross will have long fingers is:

100% ------- 80%

25% -------- X = 20%  

6 0
3 years ago
During meiosis i, maternal and paternal chromosomes come together during the process called ________ to form a ________.
raketka [301]

Answer:synapsis; tetrad

Explanation:

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Which of the following is NOT a major urine formation process?glomerular filtrationtubular reabsorptiontubular secretionmicturit
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Answer:

micturition

Explanation:

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Micturition is a process under the control of  muscles of the bladder and sphincter muscles.

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The name and its origin is appropriate because the formula for a carbohydrate is Cn(H₂O)n. This is the basic group of a carbohydrate. A carbohydrate is an organic molecules containing long chains of C, H and O molecules. Examples of carbohydrates are sugars like glucose. Its chemical formula is C₆H₁₂O₆. Other examples are other sugars like fructose, galactose, and lactose.
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