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Margarita [4]
3 years ago
8

Which definition is the best for “semipermeable membrane”?

Biology
2 answers:
kogti [31]3 years ago
5 0
A semipermeable membrane is any biological or synthetic membrane that allows certain molecules or ions to pass through while restricting others.
Leto [7]3 years ago
3 0

Answer:

It is a barrier with tiny openings that let some, but not all,materials pass through.

Explanation:

I got it right off of an edgenuity test.

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Mendel's law of segregation predicts the following specific phenotypic ratios among the F, and Fa progeny from crosses between t
aleksandrvk [35]

Answer:

C. Fi 1:0, F2 3:1

Explanation:

Firstly, Mendel's law of segregation states that the alleles of a gene will randomly separate into gametes during gamete formation. In this case involving a single trait, hence, a single gene. Mendel crossed two purebreeding plants i.e. homozygous plants that produced different phenotypes for the same gene. He obtained his offsprings which he called F1 offsprings. He realized that all the F1 offsprings expressed only one phenotype. For example, when he crossed homozygous tall (TT) and short (tt) plants, he got F1 offsprings that were all tall.

He then self-crossed these F1 offsprings to produce a F2 offsprings that had a phenotypic ratio of 3:1 i.e. 3tall, 1short plant. He concluded that the alleles of the single gene had segregated into the gametes but one allele was capable of masking the expression of another, as seen in the heterozygous F1 offsprings that were all tall (Tt).

Hence, he obtained a 1:O ratio for his F1 offsprings then a 3:1 ratio for his F2 offsprings.

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3 years ago
Understanding wobble rules select all the anticodons that could bind to the codon for serine. choose all that apply. check all t
Kipish [7]

A codon is a tree letter nucleotide sequence in the mRNA. The tRNA anticodon attached to the corresponding amino acid recognizes the mRNA codon. A single amino acid can have more than one codon. 

The serine codon can be one of the following:

<span>TCT, TCC, TCA, TCG, AGT, AGC</span>

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Can someone answer this
nordsb [41]

Answer:

oxygenated blood is pumped to the body by the left ventricle.

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Are mosses a direct ancestor of flowering plants? Explain.
zavuch27 [327]

Answer:Yes they are.

Explanation:

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