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jeyben [28]
4 years ago
12

Human sperm cells and egg cells are

Biology
1 answer:
Zinaida [17]4 years ago
6 0

Answer:

A. haploid, each contain 23 chromosomes.

Explanation:

A egg and sperms are formed after reduction division or meiosis and hence carry just 23 chromosomes , a single copy after division. the number is restored back to 46 after the fusion of egg and sperm to form a zygote.

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Which of the following statements is true with respect to protonema?
Olegator [25]

<span>Good Morning!
 
The protonema is the part of the plant that gives rise to the gametophytes in the bryophyte plants.
 
</span>It gives rise to gametophyte.<span>
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3 0
3 years ago
Which nitrogenous bases are needed to complete the DNA strand pictured below?
Paul [167]

Explanation:

Template: T, A, C, G

Pairing: T- A, A-T, C-G, G-C

Answer: adenine, thymine, guanine, cytosine

Further explanation:

Nucleic acids are comprised of smaller units called nucleotides and function as storage for the body’s genetic information. These monomers include ribonucleic acid (RNA) or deoxyribonucleic acid (DNA). They differ from other macromolecules since they don’t provide the body with energy. They exist solely to encode and protein synthesis.

Basic makeup: C, H, O, P; they contain phosphate group 5 carbon sugar, these nitrogen bases which may contain single to double bond ring.

DNA stores all of an organism’s genetic information. Its molecules comprise the nitrogenous bases Guanine, Adenine, Cytosine and Thymine. These pair up as base pairs due to their varied structure- largely influenced by the location of N molecule ;

  • cytosine and thymine are formed from pyrimidines- N at position 1 and 3 of a fused ring;
  • Guanine and adenine are formed from organic compounds called purines (pyramidines fused to another organic ring of imidazole)
  • Each base pair contains a purine and pyrimidine joined via hydrogen bonding e.g. A-T & G-C and are called base complements.

In certain combinations, these bases form codons which act as instructions for protein synthesis. Codons are three nucleotide bases encoding an amino acid or signal at the beginning or end of protein synthesis.

Learn more about transcription at brainly.com/question/11339456

Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316

7 0
3 years ago
A nurse is preparing an intravenous infusion. which part of the administration set would the nurse use to manually regulate the
Andru [333]
The part of the Intravenous infusion that the nurse should manually regulate for the desired infusion rate is the roller clamp connected to the IV tubing and drip chamber.
3 0
3 years ago
When an organism is exposed to a limited quantity of oxygen, the cell's mitochondria will stop cellular respiration involving th
Ganezh [65]

Answer: Fermentation must create a net gain of ATP.

Explanation: Fermentation is a process in which organisms such as yeast, bacteria convert sugar into an alcohol or an acid. It is an anaerobic process because it does not require oxygen. The fermentation process is completed in the cytoplasm with a net gain of 2ATP during the glycolysis. Although it is a common pathway it is not the only method used by organisms produce ATP anaerobically.

5 0
3 years ago
Taxonomy is an organizing science used in _____.<br> 8<br> zoology<br> botany<br> all of these
anygoal [31]

Correct answer choice is:

<h2>D. All of these.</h2><h3>Explanation:</h3>

Taxonomy is a branch of the science of describing and identifying groups of biological bodies on the principle of distributed features. Organisms are classified collectively into taxa and certain groups are assigned a taxonomic rank; collections of an addressed rank can be aggregated to make a super-group of higher rank, thus forming a taxonomic regime.

8 0
3 years ago
Read 2 more answers
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