BIOLOGY HIGH SCHOOL

How many chambers does the human heart have?
one
two
four
six

Answers

Answer 1
Answer:

4  is your answer your welcome ;)
Answer 2
Answer:

Answer:

4 chambers

Explanation:

Related Questions

one hypothesis regarding the extinction of dinosaurs is that a meteor hit the earth causing an explosion so powerful that dust blocked the sun. consider the model above and explain why would this have caused mass extinction.
Which of these organic molecules functions to help speed up biological chemical reactions?A) lipids B) proteins C) nucleic acids D) carbohydrates
The enamel of your teeth is the inside coating. TrueFalse
Which is most likely an acquired trait in horses? A. color of fur B. length of ears C. ability to run D. a slight limp
DirectionsChoose two organisms: one sexual reproducer and one asexual reproducer. For each organism, discuss the following: 1.Describe the organism (physical appearance, habitat, function, history, etc.). 2.Draw or find a graphic that represents your organism. 3.Detail the organism's method of reproduction: asexual or sexual type of gametes method of fertilization advantages and disadvantages of the reproduction type

Select all that apply. Factors that can increase mutation rates are _____. high temperatureslow temperaturesfood additivesUV rays

Answers

Factors that can increase mutation rates are high and low temperatures, food additives, and UV rays. All of these answers are correct. Mutation rates in genes vary depending on many environmental effects. UV rays, along with varying temperatures, can cause mutations during cell division due to the damage they impart on the cells that are dividing. Dangerous food additives are believed to cause mutations, as seen in animal studies (ie. aspartame causing cancer in rats).

The answer actually is

-High temperatures

-Food additives

-UV Rays

I just had this assignment and I got it right! Low temperatures do NOT increase mutation rates!!!

The Krebs cycle takes place within the:A. mitochondria
B. lysosome
C. vacuole
D. cytoplasm

Answers

Answer: A. mitochondria

Explanation:

The Krebs cycle is the set of reactions that drives to the complete oxidation of glucose. This occurs in the matrix of eukaryote mitochondria and the prokaryotyc cytoplasm. The main reagents of the Krebs cycle are acetate in the form of acetyl-CoA, water, and electron carriers. The main reagents of the Krebs cycle are acetate in the form of acetyl-CoA, water, and electron carriers. Reactions are catalyzed by enzymes where decarboxylases stand out (decarboxylation catalysts) and dehydrogenases (oxidation-reduction catalysts) leading to the formation of NADH).
The Krebs cycle occurs in the mitochondrial matrix (mitochondria) and generates a pool of chemical energy (ATP, NADH, and FADH2) from the oxidation of pyruvate, the end product of glycolysis. 
Hope this helps!

Which unicellular algae has cell walls made of silicon?a. diatoms
b. Euglena
c. slime molds
d. Chrysophytes

Answers

The answer to the question stated above is letter a. diatoms.
"Diatoms are unicellular algae that has cell walls made of silicon."

Diatoms are plantlike protists (unicellular algae) that produce thin, delicate cell walls rich in silicon; These planlike protists are members of the phylum Bacillariophyta.
The answer is a. diatoms.
Diatoms are unicellular algae. They are specific for their glass-like cell walls with sculpturing. Their cell wall is made of hydrated silicon dioxide. The cell wall is rigid and transparent because of silicon dioxide. Silicon cell wall cannot decompose, so can be a great help in explaining past conditions.

Which of the following accurately describes the pH scale? A. The lower the pH is, the more basic the solution is.
B. The lower the concentration of hydrogen ions, the higher the acidity is.
C. The greater the concentration of hydroxide ions, the higher the acidity is.
D. The greater the pH is, the lower the acidity is.

Answers

Well if you haven't found the answer yet it's D, as the pH scale goes from 0-14 where 14 is the most alkaline and 0 is the most acidic. Therefore as you go up the scale, the substance becomes less acidic.

Final answer:

The pH scale measures the acidity or basicity of a solution. The higher the pH, the lower the acidity and the lower the pH, the higher the acidity. It is based on hydrogen ion concentration.

Explanation:

The pH scale is a logarithmic scale used to specify the acidity or basicity of an aqueous solution. It ranges from 0 to 14. A solution with a pH less than 7 is acidic, one with a pH of 7 is neutral, and one with a pH greater than 7 is basic. Therefore, option D is the correct answer. The greater the pH is, the lower the acidity is. The lower the pH, the higher the acidity, and vice versa. This scale is based on the concentration of hydrogen ions (H+) and hydroxide ions (OH-).

Learn more about pH scale here:

brainly.com/question/1433865

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Does bacteria have a cell wall?

Answers

yes they do have a cell wall

Ecosystems have trouble adjusting to short-term changes. True or False User: Climate changes can produce various effects in ecosystems. Which of the following is a way that marine ecosystems can be affected by climate warming trends?a. decreased ocean acidity
b. increased populations of fish
c. decreased levels of carbonate
d. all of the above

Answers

1. The answer is False.

A healthy ecosystem can adapt to short-term changes. Many species have adaptive characteristics that help them respond to natural, short-term changes. For example, some plants can regrow from roots that survived in a forest fire. 

2. The answer is C. 

Climate warming is caused by CO₂ trapped in the atmosphere. These trapped carbon dioxide molecules are absorbed by the oceans. The absorption of CO₂ causes chemical reactions in seawater and one of them is it decreases the carbonate ion concentration. 
Other Questions
Many of the characters in the novel Frankenstein share traits. Match the number (characters) to the letters (traits they share).1. Walton and Frankenstein 2. Frankenstein and the creature 3. Elizabeth and Agatha A. Pairs B. love of nature C. passiveness D. blind ambition
The gland which signals other glands to secrete hormones is the ____ gland.
When a recessive trait is on the X chromosome: Answer males will never express it females will always express it males can express it more often than females will it will only be expressed in 1/4 of the offspring *males can express it more often than females will
Which type of RNA carries the genetic information from DNA to the site of protein synthesis?