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VMariaS [17]
3 years ago
13

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

Biology
1 answer:
Lemur [1.5K]3 years ago
6 0
Fdfdddddddddddddddddddddddddddddddddddddddddddddddddddd
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Place the steps tor the formation of the enzyme pepsinogen in correct order
Gelneren [198K]

1) The DNA strands unwind, and RNA polymerase binds to the template strand.


2) The synthesis of mRNA begins.


3) The mRNA undergoes intron splicing and exits the nucleus.


4) The tRNA moves through mRNA with the activated amino acids attached to it.


5) The amino acids assemble to form peptide.

Hope this helps!

-Payshence

7 0
3 years ago
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If the frequency of homozygous dominant is 60%, the frequency of heterozygous is 20%, and the frequency of homozygous recessive
Simora [160]
When a genetic population follows Hardy-Weinberg Equilibrium (HW), it states that certain biological tenets or requirements must be met. Given so, then HW states that the total frequency of all homozygous dominant alleles (p) and the total frequency of all homozygous recessive alleles (q) for a gene, account for the total # of alleles for that gene in that HW population, which is 100% or 1.00 as a decimal. So in short: p + q = 1, and additionally (p+q)^2 = 1^2, or 1
So (p+q)(p+q) algebraically works out to p^2 + 2pq + q^2 = 1, where p^2 = frequency of homozygous dominant individuals, 2pq = frequency of heterozygous individuals, and q^2 = frequency of homozygous recessive individuals.
So the problem states that homozygous dominant individuals (p^2) account for 60%, or 0.60. Thus the square root (sr) of p^2 = p or the dominant allele frequency in the population. So sr(p^2) = sr(0.60) -->
p = 0.775 or 77.5%
Homozygous recessive individuals (q^2) account for 20%, or 0.20. Thus sr(q^2) = q or the recessive allele frequency in the population. So sr(q^2) = sr(0.20) --> q = 0.447 or 44.7%
But since 44.7% + 77.5% = 122.2%, which is not equal to 1, we have a situation in which the allele frequencies do not match up, therefore this population cannot be determined using the Hardy-Weinberg Equation.
5 0
3 years ago
A student creates a model of the water cycle using some common materials In the model what part is the function of the icepack
Vinvika [58]

Answer:

In science, a model is a representation of an idea, an object, a process or a system. Using a plastic bag, students can model the water cycle. ... When the plastic bag is hung in a sunny window, heat from the Sun evaporates water from the lake and forms condensation and precipitation.

5 0
3 years ago
Why/ how does dna become more compact
Lyrx [107]

Answer: its wrapped around the proteins, and those proteins make a nucleosome

Explanation:

5 0
3 years ago
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What is the difference between the ligamentum arteriosum and the ductus arteriosus?
Goshia [24]
In fetal life, the lungs are not expanded, so most of the blood from the right ventricle is shunted from the pulmonary artery to the aorta through the patent ductus arteriosus. With a few breaths the lungs expand, and blood flows from right ventricle to pulmonary artery into the lungs. Withdrawal of circulating prostaglandin from the mother plus bradykinins released from the expanding lung of the infant cause the ductus to close over a few minutes to hours. The closed ductus remains as the ligamentum arteriosum.
6 0
4 years ago
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