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Ivahew [28]
2 years ago
11

Help please thank u skskskskz

Biology
2 answers:
SOVA2 [1]2 years ago
7 0

Answer:

side

Explanation:

valentinak56 [21]2 years ago
5 0

Answer:

top

Explanation: BTW u got a good idea to cover the camerra in the classroom :D

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What are the three chemical molecules that make up the subunits of DNA?<br><br> a, b, c, or d?
lana [24]

Answer:

A

Explanation:

This is because those items are the actual required ones when it comes to building the molecule DNA.

8 0
3 years ago
Some cells live for years, while others live for only a few days. Why do some cells get replaced faster than others?
Vladimir [108]

Answer:

<em>Some </em><em>cell</em><em>s</em><em> </em><em>don't </em><em>divide </em><em>and </em><em>last </em><em>you </em><em>a </em><em>life </em><em>time </em><em>such </em><em>as </em><em>many </em><em>of </em><em>those </em><em>in </em><em>the </em><em>central </em><em> </em><em>nervous</em><em> </em><em>system </em><em>other </em><em>c</em><em>ells </em><em>such </em><em>as </em><em>stems </em><em>called </em><em>cell </em><em>population</em><em>s</em><em> </em><em>have </em><em>their </em><em>telemeres </em><em>repeatedly</em><em> </em><em>exten</em><em>d</em><em>ed </em><em>by </em><em>the </em><em>enzyme </em><em>telomerase </em><em>other </em><em>cells </em><em>are </em><em>never </em><em>repla</em><em>c</em><em>ed </em><em>and </em><em>live </em><em>as </em><em>long </em><em>as </em><em>we </em><em>do </em><em>.</em>

<em><u>I </u></em><em><u>hope this </u></em><em><u>answer </u></em><em><u>might </u></em><em><u>help</u></em><em><u> </u></em><em><u>u </u></em>

7 0
3 years ago
Choose the true statement(s) about mutations. To be marked correct, you'll need to select all true statements, as there may be m
Kazeer [188]

Answer

All four options ( A,B,C,D ) are true about mutations.

Explanation:

A-  <u>Mutation can provide an evolutionary benefits</u>

As mutation helps in creating DNA  sequence ,new allele(variant of gene) for a specific gene , thus mutations is known to be the first step of evolution.

B-<u> Mutation leads to genetic and phenotypic variation within the species. </u>

In mutation, genetic  variation (difference between individual/population) takes place as new alleles are created ,random matings ,fertilization and during meiosis , recombination of homologous chromosomes. One of the type of mutation called gene mutation give rise to genetic variations.

Its an exceptional case of phenotypic variations ,as mostly there is no effect of mutation on phenotypic variation. Very few mutations lead to phenotype variation and in case mutation takes place in phenotype variation ,making the organism well suited to the environment, the a rapid change  in the characterstics of the individual species is seen.

C- <u>In humans, the somatic cell mutation are not passed in offsprings. </u>

Somatic cells are present in all over the body except in the cells that give rise to gametes( ie. egg and sperm cells) and produces offsprings . Thus somatic cells are absent in gametic cells ,therefore mutation cannot be passed to human's offsprings or children.

D- <u>Evolution rates are faster in bacteria than in humans because most mutations in human cells are silent.  </u>

Due to their fast  growth ,bacteria evolve quickly and share genes with each other and even between the species ,also the mutation that are helpful spread faster in bacteria.  

In humans, the silent mutation in human cells cause many genetic disorders like Laron dwarfism.  About 99.8% genes are silent mutation.

7 0
3 years ago
What role do photosynthesis and respiration play in the distribution of gases in seawater?
nydimaria [60]

Answer and explanation;

-The most important life processes in the oceans or sea water are photosynthesis and respiration. Photosynthesis by plants and  other lower organisms uses sunlight to convert CO2 and H2O to a carbohydrate compound; O2 is a by-product of that reaction. Respiration is the process that all organisms use to recover the chemical energy stored in organic compounds. O2 is used to oxidize organic matter and release chemical energy; CO2 and H2O are by-products.

-The rates of photosynthesis and respiration are nearly balanced.all of the organic matter produced by photosynthetic algae is respired by consumer and decomposing organisms.

5 0
3 years ago
DNA in the nucleus unzips and mRNA forms a copy of the gene. It then moves out of the nucleus to the ribsome where is matches it
zhannawk [14.2K]
Protein synthesis I believe
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3 years ago
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