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Varvara68 [4.7K]
3 years ago
10

Chapter 1: Introduction: Evolution and the Foundations of Biology 1. _______ DNA is composed of building blocks called _____. a.

Nucleic acids b. Gs c. Nucleotides d. Adenines
Biology
1 answer:
irina [24]3 years ago
6 0

Answer:

C. Nucleotides

Explanation:

Nucleic acids are macromolecules which are polymers of nucleotides. There are two types of nucleic acids namely: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Nucleotides are the building blocks of nucleic acids.

A nucleotide is made up of three components:

- A phosphate group

- A five carbon sugar called pentose sugar. In RNA the sugar is ribose sugar and in DNA the sugar is deoxyribose sugar.

- Nitrogenous bases: There are four different types of bases in DNA: adenine, guanine, cytosine and thymine. In RNA thymine is replaced by uracil. Adenine and guanine are purines whereas cytosine, thymine and uracil are pyrimidines.

Nitrogenous base and sugar together are called nucleoside and when phosphate is also attached then it is called nucleotide.

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Classify each statement based on whether it describes prokaryotes only, eukaryotes only, or can describe both prokaryotes and eu
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Answer:

unicellular - both prokaryotes and eukaryotes

contain mitochondrion - eukaryotes only

are generally less than 2 pm - Prokaryotes only

multicellular - eukaryotes only

lack membrane-bound organelles - prokaryotes only

Explanation:

Prokaryotes are generally unicellular, that is, they are made up of single cells only. However, there are unicellular and multicellular eukaryotes with some eukaryotes like humans and advanced plants having as many as millions of cells.

Prokaryotes generally lack nucleus and other membrane-bound organelles such as chloroplast and mitochondrion. Eukaryotes on the other hand have nucleus and membrane-bound organelles such as mitochondrion and chloroplast.

When it comes to size, prokaryotes are generally small and microscopic while eukaryotes consist of both microscopic and macroscopic cells or organisms. However, prokaryotes are generally smaller than microscopic eukaryotes.

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3 years ago
What is the possible genotype and phenotype for the dominant trait circular flower and recessive trait square flower
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4 0
3 years ago
1.Cooking utensils with oil cannot be cleaned using fresh water.Why?
34kurt

Answer:

Because you need to scrub them with soap first.

Explanation:

The reason is that if you don't and wash with water, the cooking utensils will stay greasy; that is why you need to scrub and then wash.

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3 years ago
The Food and Drug Administration has legal oversight over most food products and permits some health claims on food labels. The
Igoryamba

Answer:

  1. Reduced risk of neural tube defects- <u>diet adequate in synthetic form of folate </u>
  2. Reduced risk of hypertension and stroke- <u>diet low in sodium and high in potassium </u>
  3. Reduced risk of cardiovascular disease- <u>fatty acids from oils present in fish </u>
  4. Reduced risk of some types of cancer- <u>diet rich in fiber</u>

Explanation:

As you may already know, the adequate intake of certain nutrients is very beneficial to our body and to improve and maintain our health. That's because these nutrients act in the construction of essential molecules to keep our body functioning in a healthy and adequate way. Among the numerous nutrients necessary for our health, we can mention that the adequate intake of folate has the ability to reduce the creation of possible defects in the neural tube, while a diet rich in potassium can reduce the risks of hypertension, especially if accompanied by a low sodium diet. Following this same reasoning, a diet rich in fiber can reduce the risk of cancer, in addition to promoting good bowel function. Last but not least, a diet rich in fatty acids from fish can reduce cardiovascular disease.

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3 years ago
Identify the independent and dependent variable for the following statement :
just olya [345]

Answer:

IV: Student grade level (6th, 7th, 8th)

DV: "Loudness" (Operationalizing this variable would be beneficial, or in other words, define a way to measure it)

Explanation:

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