1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ollegr [7]
3 years ago
5

In 1805, a Scottish explorer named Mungo Park led an expedition of European geographers to find the source of the Niger River in

Africa. The journey began with a party of 45 Europeans. During the expedition, most of these men perished from malaria. Their native guides and the other natives they encountered were seemingly unaffected. Use the data to construct an explanation for why the native Africans’ phenotype helped them survive.
Biology
1 answer:
nikklg [1K]3 years ago
7 0

Explanation:

Mungo Park (11 September 1771 – 1806) was a Scottish explorer of West Africa. After an exploration of the upper Niger River around 1796, he wrote a popular and influential travel book titled Travels in the Interior Districts of Africa in which he theorized the Niger and Congo merged to become the same river.

Mungo Park was an intrepid and daring traveller and explorer, hailing originally from Scotland. He explored West Africa during the tumultuous 18th century, and was actually the first Westerner to travel to the central part of the Niger River.

Reports that the expedition had met with disaster soon reached the settlements on the Gambia. In 1812 it was learned that when the explorers reached the rapids at Bussa, about 1,000 miles below Sansanding, they were attacked by local inhabitants, and Park was drowned.

You might be interested in
What is the meaning of prey
kondaur [170]

Answer: an animal that is hunted and killed by another for food.

Explanation:

4 0
4 years ago
Read 2 more answers
Cyanobacteria are a type of _____ that _______.
Yakvenalex [24]
B) bacteria, are producers

3 0
3 years ago
After glycolysis occurs, the products may enter through the Krebs cycle. What major products result from these reactions?
vazorg [7]
Glycolysis produces two molecules of pyruvic acid that undergoes a process allowing it to enter the kreb (citric acid) cycle that eventually produces ATP molecules from the electron transport chain
8 0
4 years ago
Read 2 more answers
Select the correct answer from each drop-down menu. rna interference is a mechanism of eukaryotic gene regulation. in this mecha
rosijanka [135]

The dicer enzyme processes dsRNA and forms siRNAs, which suppress the expression of target genes by cutting mRNA. 1) siRNA 2) RNA.

<h3>What are siRNA fragments?</h3>

siRNA means small interfering RNA. This is a silencing RNA molecule involved in the RNA interference mechanism, intervening in the expression of a specific gene.

siRNAs are complementary double-stranded RNA molecules composed of about 20-21 nucleotides. siRNA originates from a long double-stranded RNA (dsRNA).

The dicer enzyme cuts dsRNA molecules and produces siRNA. siRNAs suppress the expression of target genes when cutting messenger RNA.

siRNAs suppress the expression of target genes by cutting the complementary messenger RNA (mRNA) into two halves. This is accomplished by the interaction of the siRNA with the RISC complex (RNA-induced silencing complex).

The two mRNA halves are later degraded by the cellular machinery, leading to the suppression of the gene expression.

siRNAs also participate in other pathways related to RNAi, such as in antiviral defense or in the chromatin structure organization.

RNA interference is a mechanism of eukaryotic gene regulation. In this mechanism, the enzyme dicer cuts dsRNA into smaller fragments called (1) siRNA, which form a complex with RISC and degrade specific (2) RNA.

You can learn more about siRNA at

brainly.com/question/7508257

#SPJ1

5 0
2 years ago
What are the most common minerals in Earths crust? A. Evaporates, B. Organic Minerals, C. Metal Ores, D. Silicates . When you an
Molodets [167]
B would be the answer
4 0
3 years ago
Other questions:
  • In which case is an atom least likely to bond with other atoms?
    5·2 answers
  • In a food chain, energy flow begins with_
    10·2 answers
  • Define BAC. List the symptoms of impairment for the BAC levels listed. (Circle the BAC that is considered the “legal limit”)
    7·1 answer
  • What is a mass extinction?​
    8·2 answers
  • Answer For Brainlest, thanks.
    7·1 answer
  • Which of the following is not a benefit of Genetic Engineering? A. Enhancing the desirable traits of organisms B. Helping to red
    7·1 answer
  • How do cellular respiration and photosynthesis work together to recycle matter
    8·2 answers
  • A hacker stood outside a building and spun up a wireless network without anyone's knowledge. At that point, the hacker was able
    8·1 answer
  • What is the difference between a hypothesis and a theory?
    7·2 answers
  • 27 Scientists are ____about the subjects they study.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!