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Aleonysh [2.5K]
2 years ago
13

What did Charles Darwin conclude during his visit to the Galapagos islands?

Biology
1 answer:
harina [27]2 years ago
3 0
Darwin finally consolidated all of his observations into his famous book On The Origin of Species, drastically and controversially altering the scientific view on the biological origins of life. I learned this a little while ago in my school, I kept notes!! Hope this helps!! <3
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The food web consists of several different smaller _____.
dem82 [27]
Food chains I hope this is correct
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2 years ago
If the Pacific Ocean is rimmed by the Ring of Fire, what can we conclude about the plate boundaries in that region?
bulgar [2K]
If the pacific ocean was rimmed by the ring of fire we can conclude that the plate boundaries are constantly moving
3 0
2 years ago
A certain eukaryotic organism has multiple, distinct genes with highly similar sequences that are expressed at different times i
vlabodo [156]

These genes could have arisen by gene duplication.

<h3>What is gene duplication?</h3>

Gene duplication is the process of copying a section of DNA that codes for a gene. A retro transposition event or a recombination mistake are both potential causes of gene duplication. As a result, the duplicate gene coding may experience a significant number of modifications throughout time. This might prevent the gene from functioning or, in other situations, give the creature a benefit.

Gene duplication is a phenomenon that can happen through a variety of ways:

  • Ectopic Recombination: Uneven crossing-over between misaligned homologous chromosomes during meiosis might result in duplications. A duplication at the exchange site and a reciprocal deletion are the results of this recombination.
  • Replication Slippage: Short genomic sequences can be duplicated as a result of the replication error known as replication slippage. DNA polymerase starts copying the DNA during replication, but eventually the polymerase separates from the DNA, causing replication to stall. The replicating strand is incorrectly aligned when the polymerase reattaches to the DNA strand, which accidentally results in several copies of the same portion.
  • Aneuploidy: When a single chromosome's nondisjunction causes an abnormally high number of chromosomes, this condition is known as aneuploidy. Aneuploidy is frequently damaging and frequently causes spontaneous miscarriages in mammals. Some aneuploid people can survive. For instance, human trisomy 21 causes Down syndrome but is not lethal.

Learn more about gene duplication here:

brainly.com/question/14014915

#SPJ4

3 0
1 year ago
PLEASE SOMEONE AWNSER THIS FOR REALLLL PLEASEEEEE
ziro4ka [17]

Answer:

It is pertinent to understand what hypertonic, hypotonic, and isotonic solution means before setting out to explain how a cell reaches equilibrium in each type of solution.

A hypertonic solution is one whose solute concentration is higher than that of the sap of a cell that is immersed in it.

A hypotonic solution is one with the same solute concentration as that of the sap of the cell immersed in it.

An isotonic solution has a lower solute concentration than that of the sap of the cell immersed in it.

In biological systems, water molecules move by osmosis from the region of higher water potential or lower concentration of solutes to the region of lower water potential or higher concentration of solute. An equilibrium is reached when there is no net movement of water between two sides. Hence;

A cell placed in a hypertonic solution will lose water to the surrounding solution until an equilibrium is reached. This means that such a cell will end up shrinking (wilting) or even dying due to loss of water from the cell sap.

A cell placed in a hypotonic solution will gain water from the surrounding solution until there is no net movement of water anymore. Such a cell might become turgid or even burst out its cell content.

A cell placed in an isotonic solution will neither gain nor lose water because the cell sap and the surrounding solution have equal solute concentrations.

Explanation:

3 0
2 years ago
Which option identifies the most likely contributor to a microclimate that forms in a northern-facing valley?
Ronch [10]

Answer:

Topography

Explanation:

I just took the quiz.

6 0
3 years ago
Read 2 more answers
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