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Scilla [17]
4 years ago
12

Which phrase best describes the main function of the stomach?

Biology
1 answer:
Roman55 [17]4 years ago
3 0
A.
contracts to move substances through the body
D.
breaks down food to acquire nutrients
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How many ovaries does a flower have?
VMariaS [17]
There is about 2 ovaries in a flower.
3 0
3 years ago
Read 2 more answers
A certain buffer is made by mixing a weak acid HA and its conjugate base A–. When HA is present at a concentration of 0.5 mM and
MAVERICK [17]

Answer:The ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02 is 0.69

Explanation:

The dissociation constant for formic acid = K_a=1.8\times 10^{-4}

Concentration of HA= 0.5 mM

Concentration of A^-= 0.1 mM

pH = 6.16

First we have to calculate the value of K_a.

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[A^-}{[HA]}

Now put all the given values in this expression, we get:

6.16=pK_a+\log (\frac{[0.1]}{0.5})

pK_a=6.86

To calculate the ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02.

Using Henderson Hesselbach equation :

7.02=6.86+\log \frac{[A^-]}{[HA]}

7.02=6.86+\log \frac{[A^-]}{[HA]}

\frac{[A^-]}{[HA]}=1.44

\frac{[HA]}{[A^-]}=0.69

Thus the ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02 is 0.69

7 0
3 years ago
Which of the following is an example of how an abiotic component
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Answer: C

Explanation:

Bc i think it is n it’s affecting the community of bats

4 0
3 years ago
8. If an atom has 35 protons in the nucleus, how many electrons will it have orbiting the
slega [8]
35 electrons is the answer to your question :)
8 0
3 years ago
Class Domain Family Genus Kingdom Order Phylum Species Taxonomy hominidsix kingdom system This is the study of grouping and nami
agasfer [191]

Your answers would be:

1. Taxonomy

2. Genus

3. Species

4. Phylum

5. Class

6. Order

7. Family

8. Kingdom

9. Domain

10. Six Kingdom System

11. Hominid

1.Taxonomy is the practice of categorizing organisms and naming them. All organisms are classified into specific groups and are then given a scientific name.

2. Genus is one of the more specific grouping and it is the genus that makes up the first part of the scientific name. The organisms are grouped based on their characteristics, traits, qualities and/or features.

3. Species is the most specific among all classifications. It is distinguished though as the group that categorizes organisms based on their ability to reproduce with each other.

4, Phylum is one of the broader categories/groups. They distinguish the different organisms based on their characteristics also but are not as specific. It divides the different kingdoms into smaller groups. For example, Kingdom Animalia would have phylum chordata which includes all vertebrates.

5. Class divides phylums down into more specific features. For example, phylum chordata is divided further into classes such as mammalia (mammals), reptilia (reptiles), Aves (birds), amphibia (amphibians), and the like.

6. Order again, is more specific. It divides classes into different groups once again. So for example, for humans, we are classified as Class mammalia and then we belong in the order of primates.

7. Family on the other hand comes after order. It is more specific and comes right after order. Again, using humans as an example, our family is hominidae, which puts organisms that are distinguished for their ability of walking upright.

8. In the Linean biological taxonomy the highest classification was Kingdom. In his classification system, organisms were divided into only 3 kingdoms. As technology and discovery expanded, we have added to it.

9. Domain is the higher rank than kingdom. It is the broadest among all. There are three main domains now, we have Eukaryota, Arachaea, and Bacteria. In the old system

10. The 6 Kingdom System is the most recent classification system. The organisms are divided into 6 kingdoms:

  • Animals
  • Plants
  • Protists
  • Fungi
  • Archaebacteria
  • Eubacteria

11. Hominid is a member of Hominidae family. These are species that share about 97% similarity to the DNA of the modern human. The species included in the hominid family have simple cultures and have a capacity to communicate through language.

7 0
3 years ago
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