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3 years ago

How can we tell that two species shared a common ancestor, and are therefore related?

Biology

2 answers:

Lemur [1.5K]3 years ago

7 0

Answer:

Homologous structures provide evidence for common ancestry, while analogous structures show that similar selective pressures can produce similar adaptations (beneficial features). Similarities and differences among biological molecules

Neko [114]3 years ago

3 0

Explanation:

There are multiple ways you can tell

you can look at the bone structure of an organism and see if it's homolougous

Or use a cladogram to tell what species share a common ancestor ( hope this helps)

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Which is an example of a heterogeneous catalyst?

irakobra [83]

<span>amylase is an example of an enzyme</span>

In biochemical reactions, it is mostly triggered by enzymes. Enzymes are important components in the process that involves metabolism and digestive functions, further, most of these enzymes are proteins.Proteins are biological macromolecule and mostly composed of enzymes. Proteins play a role in the physical make-up of a cell or acts as a cytoskeleton –maintains cell shape and figure. These proteins plays different roles and works with nucleic acids and other macromolecules in the cells including cell cycle, cell adhesion, immune response and cell indicators.

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4 years ago

Under which circumstances should we try to control the population numbers of Pfiesteria?

zvonat [6]

Answer:

Pfiesteria species generally found in estuaries, the population of which are needed to be controlled only when they becomes toxic. Presence of large of fish triggers toxicity in Pfiesteria.

Explanation:

Pfiesteria are known to be associated with fish kills as for example large fish kill in the seas of North Carolina. It also causes blooming of algae in enormous numbers thus make the water bodies, hostile for survival of fishes and other marine lives. It affects human too by release of toxins in air and water often resulting in respiratory problems, infections of gastrointestinal system, headaches and fatigue. In this type of grave circumstances, leading to outburst of population of Pfiesteria, there is an urgent need to control.

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3 years ago

Which is one of the primary goals of the Human Genome Project? to cure all diseases that affect humans to sequence the genome of

AlladinOne [14]

Human Genome Project or HGP was an international and collaborative program, which aimed towards complete mapping, sequencing, and research of the human genome.

<h3 /><h3>What are the primary goals of the Human Genome Project?</h3>

Human Genome Project was a long, extensive, and collaborative research program initiated in the year 1990 and ended in 2003.

The aim of the project was to map and sequence the human genome to understand the genetics, hereditary, and other biological studies.

The primary goal of the HGP was to accurately sequence the 3 billion nucleotide base pairs. The second aim was to identify the genetic sequence in the DNA, which is estimated to be 20,000 to 25,000.

Thus, the primary aim of the HGP was to sequence the 20,000 to 25,000 genes that comprise the human genome.

Learn more about <u>HGP </u>here:

brainly.com/question/2395967

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3 years ago

Hii! i’ll give brainliest pls help

marysya [2.9K]

Answer:

a and i already answer this

Explanation:

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3 years ago

Knowing that some individuals from Island 1 colonized Island 2, biologists sample the Mainland and two Island populations fifty

raketka [301]

Answer:

The evolutionary mechanism that could be influencing the allele frequencies between both islands and the mainland population might be Founder Effect.

Explanation:

Genetic drift is the random change that occurs in the allelic frequency of a population through generations. The magnitude of this change is inversely related to the size of the original population. These changes produced by genetic drift accumulate in time and eventually, some alleles get lost, while some others might set. Genetic drift affects a population and reduces its size dramatically due to a disaster -bottleneck effect- or because of a population split -founder effect-. In <u>founder effect</u>, a new population originates when a few individuals who are coming from a bigger population carrying its genes, settle down in a new area and reproduce. This small population might or might not be genetically representative of the original one. Some rare alleles might be exceeded or might be completely lost. Consequently, when the small population increases in size, it will have a genetically different composition from the original one. In these situations, <u>genetic variability is reduced</u> and there exists the possibility of developing a peculiar allelic composition. If the number of individuals that originated the new population is low, the founder effect will be very extreme, because the effects of the genetic drift are inversely proportional to the original number of individuals.

<em>In the exposed situation, the evolutionary mechanism that could be influencing the allele frequencies between both islands and the mainland population might be Founder Effect. The fact that both islands are similar in their frequencies might be due to little genetic variation on island 1, or because dispersion to island 2 is a recent event on time. </em>

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2 years ago