BIOLOGY HIGH SCHOOL

The scientist who first studied the world of microscopic life was A. Copernicus.
B. Kepler.
C. Leeuwenhoek.
D. Bacon.

Answers

Answer 1
Answer: I believe the answer is C, Leeunwenhoek because Copernicus was an astronomer, Kepler was a mathematician and astronomer and I THINK Bacon was a philosopher. Out of the 4, Leeuwenhoek was the only one strictly known for being a microbiologist, not only that but he was the first. I hope this helped :)

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Organisms within an ecosystem are ___________________factors in that ecosystem.a. abiotic b. biotic

Levene made which contribution to our understanding of DNA structure? a. He determined that the nucleus contains DNA. b. He determined that DNA contains four nitrogenous bases. c. He determined that DNA consists of nucleotides. d. He determined that the nitrogenous bases of DNA are present in regular ratios.

Answers

Answer:

The correct answer is  b. He determined that DNA contains four nitrogenous bases.

Explanation:

Levene was an American biochemist who studied the structure of DNA in the early 1900s and in 1920 he found that DNA consists of four nitrogenous bases that are Adenine, Guanine, Thymine, Cytosine.

He also found deoxyribose sugar and phosphate group and said that nucleotide is the basic unit of DNA which contains a ribose sugar with attached nitrogenous base and phosphate group.

He also concludes that an equal amount of adenine, guanine, thymine, and cytosine makes the DNA which is now known as tetranucleotide hypothesis. So the correct answer is b. He determined that DNA contains four nitrogenous bases.  

Aluminum is an element. Which best describes what makes up a sample of aluminum?

Answers

Answer:

one kind of atom

Explanation:

Answer:

one kind of atom

Explanation:

What is the muscular valve between the esophagus and the stomach

Answers

Answer:

The lower esophageal sphincter, or gastroesophageal sphincter

Explanation:

The esophagus is a structure, part of the alimentary canal (gastrointestinal tract) that connects the pharynx to the stomach and through which the food passes. The esophagus is a fibromuscular tube that is involved in the food transport via peristaltic contractions (radially symmetric muscle contractions and relaxation).

A person sees a ball and kicks it, in part because of actions of the nervous system. Using the parts of the nervous system listed bellow, describe the path of nerve impulses that cause the person to see the ball• brain
• motor neurons
• sensory neurons
• spinal cord

Answers

The signal will start from the eyes. The message is carried by sensory neurons to the spinal cord. There, the "impulse" will transfer to motor neurons which will carry it to the brain. So in short:

Sensory neurons --> spinal cord --> motor neurons --> brain

Which of the following is not a physical property of iron? conductivity ability to rust color melting point

Answers

The ability to rust is not a physical property of iron because rusting change the chemical composition of iron.

What is physical property?

  • The property of a metal that leads to the change in the size of the shape of metal but not in the chemical structure or composition of the metal.

Conductivity:

  • It is the property by which metals are able to pass electrons which connected to an electric current source or heat source.

Ability to rust:

  • Iron reacts with oxygen to form iron oxide which is known as rust. In this, the chemical composition of pure iron is changed.

  • Color is the physical appearance and the melting point is the temperature at which solid iron converts to liquid iron but the chemical composition does not change.

Therefore, the ability to rust is not a physical property of iron.

Learn more about the physical properties:

brainly.com/question/545557
First, a physical property just identifies it's state, how it looks, color, and that stuff. Let's work on finding that. 

⇔ Ability to rust wouldn't work as a physical property. That one changes the substance, making it a chemical change. So, we know that this can certainly be our answer!

Which of these sentences best describes the overlap between argumentative and persuasive texts?A. Both text types always recognize the existence of opposing opinions.
B. Both text types force the reader to adopt the author’s viewpoint.
C. Both text types use rhetorical techniques to support a particular viewpoint.
D. Both text types use bias and persuasive techniques to sway the audience.

Answers

Answer:

The sentence which best describes the overlap between argumentative and persuasive texts is:

C. Both text types use rhetorical techniques to support a particular viewpoint.

Explanation:

Argumentative texts are written by citing evidence and sources. This is much of a scientific approach with statistics and quotes from the experts.

Persuasive texts are aimed to persuade the audience by using much of emotional and opinion related arguments.
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A variable that is described using both a number and a direction is called ________
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