BIOLOGY HIGH SCHOOL

In 1831, Charles Darwin visited the Galapagos Islands. While observing the giant land tortoises that lived on these islands, Darwin noted that the shape of the tortoise shell varied depending on which island the tortoise lived. Tortoises on one island had round shells, for example, whereas tortoises on a neighboring island had more flattened, saddle-shaped shells. Which statement BEST summarizes Darwin's explanation for these differences?A) Random mutations caused the shape of the shells to fluctuate periodically.
B) The shape of the tortoise shell varied because the predators on the islands were different.
C) The particular shape of the shell was best suited for the island on which the tortoise was living.
D) Tortoises who used their shells in special ways caused the shells to become larger, rounder, or flatter.

Answers

Answer 1
Answer: B) The shape of the tortoise shell varied because the predators on the islands were different. 

Natural Selection is a process where “survival of the fittest” is based from. Because the environment cannot support all organisms borne, those organisms must compete with each other for food, shelter and protection. Organisms may die due to accidents but majority of the organisms die due to their inability to survive stiff competition. 

Darwin’s theory of evolution 
1)      Variation exists among individuals within species. 
2)      Organisms produce more offspring than the environment can support 
3)      Competition exists among individuals.
 4)      The organisms whose variations best fit them to the environment are the ones who most likely to survive, reproduce, and pass those desirable variations on to the next generation. 

Related Questions

Which of these investment plans best reflects diversification?A. Ben has an investment portfolio with numerous stocks and futures. B. Kenya invests in stocks, bonds, and mutual funds. C. Jeremiah takes out a CD and keeps the rest of his money in a savings account. D. Molly splits her investment between mutual funds and a money market account.
When does differentiation begin in a human embryo? day 4-5 day 10 day 25-26 day 50
type O, while the blood type of Mr. Johnson has Type A blood. The lawyer claims that Mr. Johnson cannot be the father of a child with Type O blood. Is the attorney right? Why or why not? Explain your answer.
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How did Darwin interpret the fossil record?

All of the following are the results of an overreactive immune system to harmless antigens excepta. allergies.
b. AIDS.
c. lupus.
d. asthma.

Answers

The most likely and the most probable answer to this problem together with the choices presented with it is B. AIDS.

Allergies are reactions to certain stuff around the environment. This usually causes rashes and other inflammation of certain parts. Some are just very mild while some become very deadly to the health and life of the person with it. Lupus, on the other hand, is also an inflammatory disease on the skin. Asthma might occur together with an allergy and is usually caused by the interaction to the environment and with an over-active immune system to harmless antigens.

The answer is aids lol

Which events take place in the light-dependent reactions of photosynthesis?

Answers

Answer:

The answer is: The formation of the ATP energy storage molecule and the reduced electron carrier NADPH.

Explanation:

It turns out that part of the light energy absorbed by the pigments in the leaves is converted in a different way, into chemical energy.

Light-dependent reactions use light energy to form two molecules necessary for the next stage of photosynthesis: the ATP energy storage molecule and the reduced NADPH electron carrier.

The answer is: The formation of the ATP energy storage molecule and the reduced electron carrier NADPH.
There are four major protein complexes in the thylakoid membrane: Photosystem II (PSII), Cytochrome b6f complex, Photosystem I (PSI), and ATP synthase. These four complexes work together to ultimately create the products ATP and NADPH.

The direct visual examination of the colon via a flexible, lighted instrument is called:

Answers

A colonoscope is a flexible fiber-optic instrument used to examine the colon

What is the science of naming and classifying organisms based on structural comparisons and genetic evidence

Answers

The correct answer is taxonomy,

Taxonomy is a branch of biology that aims to to sort living thing into categories. In its early years, taxonomy was solely based on structural comparisons, mostly the anatomical similarities and differences between the organisms. However, with the discovery of the physiological processes and the genetic structures of organisms, the previous taxonomic knowledge was revised and changed in the light of the new scientific finds. Nowadays, taxonomy is primarily based on genetic similarities between the organisms.
Taxonomy is the science of naming things.

Which of following is not essential part of virus?

Answers

Envelope is not essential part of virus (option B)

What is virus?

A virus is a small, infectious agent that can replicate only inside the cells of living hosts. Viruses are not considered living organisms because they do not have their own metabolism or cell structure.

The essential parts of a virus are:

  • Nucleic acid: This is the genetic material of the virus, which can be either DNA or RNA. The nucleic acid carries the instructions for making new viruses.

  • Capsid: This is the protein coat that surrounds the nucleic acid. The capsid protects the nucleic acid and helps it to attach to host cells.

Learn about virus here brainly.com/question/17395741

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Which of these have prokaryotic cells?a.

snails

c.

bacteria


b.

frogs

d.

food

Answers

 Prokaryotes lack a distinct cell nucleus and their DNA is not organized into chromosomes. They also lack the internal structures bound by membranes called organelles, such as mitochondria. Bacteria have prokaryotic cells. Snails, frogs and food, do not.
it a bacteria because snails and frogs are made up of eukaryotic cells
Other Questions
Define abiotic factors
What is the main function of the nucleolus within the nucleus of a cell? A. storage of genetic information B. manufacturing of ribosomes C. production of energy D. protection and support for the cell
After an RNA molecule is transcribed from a eukaryotic gene, what is removed and what is spliced together to produce an mRNA molecule with a continuous coding sequence?a) operators; promoters. b) exons; introns. c) silencers; enhancers.d) introns; exons. e) promoters; operators.
Explain why meiosis cannot happen without mitosis.