Explanation:
Mutations increase variation within a population.
During the process of cell division, spontaneous changes within the genome can arise. These mutations are errors occur when copies of the DNA within the cell are made; mutations may range from small changes called single nucleotide polymorphisms, to large scale deletions, and additions which span multiple genes. There are two types:
- somatic: these only occur within certain cells, and arise from environmental factors such as UV light
- hereditary: occur within germ cells of the parent and later the fertilized egg which forms a zygote; these are present within all cells of the new organism.
Further Explanation:
During reproduction other events, such as crossing over during mitosis and meiosis, mutations lead to increases in genetic variation. This variation refers to the genetic characteristics present within a species. Mutations may be either beneficial or deleterious; they are maintained within cells, as they form new traits called alleles. Beneficial mutations may confer traits that increase the fitness of a species, along with ensuring survival by conferring a protective advantage- these phenotypic differences between organisms are called adaptations.
Sequences of DNA make up genes which can have different forms called alleles. DNA, which makes up the genotype, is transcribed into mRNA and later translated into amino acids which are linked together by rRNA to form proteins which make up the phenotype of an organism.Mutations in DNA sequences affect the corresponding mRNA and thus the protein encoded.
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If a phospholipid is located in the outer layer of the bilayer in a vesicle, it will end up in the cytosolic face of the bilayer when the vesicle fuses with the plasma membrane.
The lipids on the exterior of a vesicle will end up in the phospholipid layer on the interior (cytosolic face) of the plasma membrane when it fuses with the membrane. The extracellular fluid in the plasma membrane will be in contact with the lipids on the interior of the vesicle membrane.
What is a phospholipid?
Phospholipids are a subclass of lipids that have two hydrophobic "tails" made of fatty acids connected by an alcohol residue. Their hydrophilic "head" contains a phosphate group (usually a glycerol molecule).
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Answer: A, through extensive testing and the accumulation of several lines of evidence
Explanation:
We do not use carbon dioxide to fuel our blood cells. It is a waste.
Arteries move blood from the heart to the rest of the body.
Veins carry the blood to the heart to be oxidized.
"D" is not correct.
"B" is not correct.
We know that veins carry blood to the heart, lungs exhale carbon dioxide.
"A" is the correct answer.
I hope this helps!
~kaikers
Hemoglobin is contained in red blood cells,which efficiently carries oxygen from the lungs to the tissues of the body. It also helps in the transportation of carbon dioxide and hydrogen ions back to the lungs.
