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xxTIMURxx [149]
3 years ago
13

How do you think Darwin came up with his theory?

Biology
1 answer:
Wittaler [7]3 years ago
5 0

Answer:

The theory of evolution by natural selection, first formulated in Darwin's book "On the Origin of Species" in 1859, is the process by which organisms change over time as a result of changes in heritable physical or behavioral traits. Changes that allow an organism to better adapt to its environment will help it survive and have more offspring.

Evolution by natural selection is one of the best substantiated theories in the history of science, supported by evidence from a wide variety of scientific disciplines, including paleontology, geology, genetics and developmental biology.

The theory has two main points, said Brian Richmond, curator of human origins at the American Museum of Natural History in New York City. "All life on Earth is connected and related to each other," and this diversity of life is a product of "modifications of populations by natural selection, where some traits were favored in and environment over others," he said.

More simply put, the theory can be described as "descent with modification," said Briana Pobiner, an anthropologist and educator at the Smithsonian Institution National Museum of Natural History in Washington, D.C., who specializes in the study of human origins.

The theory is sometimes described as "survival of the fittest," but that can be misleading, Pobiner said. Here, "fitness" refers not to an organism's strength or athletic ability, but rather the ability to survive and reproduce.

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Descending colon is found between the transverse and sigmoid colon on the left side of the abdominal cavity.

<h3>What are the components of large intestine?</h3>

The cecum, colon, rectum, and anus are the components of the large intestine. Mesenteries are tissue folds that hold the colon and rectum in the belly.

Caecum: The colon and ileum (the last part of the small intestine) are connected by a pouch-like channel called the cecum.

Colon: The longest part of the large intestine is the colon. There are 4 sections in the colon-

  • Ascending colon: The colon begins with the ascending colon. It is located on the abdomen's right side. It continues upward until it reaches the hepatic flexure, a bend in the colon.
  • Transverse colon: Following the ascending colon and hepatic flexure is the transverse colon. The upper portion of the abdomen is where it is located. The splenic flexure, a bend in the colon, marks its conclusion.
  • Descending colon: The transverse colon and splenic flexure are followed by the descending colon. The abdomen's left side is where it is located.
  • Sigmoid colon: The colon's final section, the sigmoid colon, joins to the rectum.

Rectum: The lower portion of the large intestine that joins the sigmoid colon is known as the rectum. Its length is roughly 15 cm (6 in). It takes waste from the colon and keeps it there until the anus allows it to leave the body.

Anus: The aperture at the bottom end of the rectum known as the anus is where feces exits the body.

Learn more about large intestine here:

brainly.com/question/1751875

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6 0
2 years ago
Question 2(Multiple Choice Worth 2 points)
Vanyuwa [196]
Your answer is D. untestable and open to change
4 0
2 years ago
What is true about the relationship of adenine and thymine?
MAXImum [283]
<span>DNA stands for deoxyribonucleic acid. The deoxy- in the DNA is a short term for deoxyribose. The nucleic acid molecule has three parts; sugar, phosphate and a base. The phosphate in the DNA acts as a backbone of the molecule. It is also responsible for the DNA’s ‘double-helix’ structure. The base has four codes namely adenine, thymine, cytosine and guanine. Adenine and thymine are bse pairs whereas cytosine and guanine are base pairs. They are not to be interchanged. Resulting in one cause mutation in the gene. </span>
8 0
3 years ago
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Which chromosomal event in meiosis explains mendel's principle of independent assortment?
fiasKO [112]
Crossing over? That involves the random exchange of chromosomes. 
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3 years ago
Identify the parts of the female and male reproductive system and their functions. ​
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<u><em>Female:</em></u>

*Ovaries - release of oocytes (eggs), estrogen and progesterone.

*Oviducts (fallopian tubes) - where fertilization of the oocyte occurs to form a zygote.

*Uterus - where the zygote develops

*Cervix and vagina - allow for the entry of sperm for fertilization

<u><em>Male:</em></u>

*Testes - Releases testosterone and sperm

*Vas deferens - Passageway for sperm

*Epididymis - allows the sperm to pass from the testes and vas deferens and equips them with semen so they can survive internal fertilization

*Penis - releases sperm into the external environment for fertilization to occur

I hope I helped!

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3 years ago
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