Biology Answers

What one formula can I use to calculate the superposition of three waves?

Device-associated infections such as using central venous catheters, endotracheal tubes and urinary catheters are very common in healthcare settings. Can you think of two other activities that occur in hospitals that might be likely to lead to new infections?

Speculate as to what led to the similarity between bacteria from eukaryotic cells?

write a full report on the effectiveness of barrier methods, surgical methods, chemical methods, and behavior methods on the control of pregnancies and sexual transmissible diseases.  

• Briefly describe the structure of a eukaryotic plasma membrane, identifying at least two component macromolecules and describing what their basic function is within the membrane.

 The plasma membrane protects the integrity of the interior of the cell by allowing certain substances in, while keeping other substances out.

• Summarize the manner in which small molecules are permitted to pass through the membrane ensuring you explain the difference between passive, facilitated, active, and coupled transport by comparing and contrasting them.
• Finally, explain the difference between endocytosis and exocytosis and provide an example of a molecule (remembering to state its function) that is transferred using this method.

How is photosynthesis linked to nucleic acid?

Why are polyunsaturated omega 3 acids considered as good for our health? Explain such phenomena based on their chemical structure

Anodontia is a recessive hereditary disease which causes the absence of teeth or any tooth germ.

First cross: The father has a normal phenotype and the mother has the disease, the sons are all affected and the girls are always healthy.

Second cross: The father is affected and the mother is healthy, sons and daughters can have a normal or sick phenotype.

1. Determine the chromosomal location of the gene responsible for this disease. Then perform a factorial analysis to verify the above results

a)   On crossing a plant with red fruit and hairy stem, with one that was yellow fruit and hairy stem, the following progeny were obtained:

           30 red, hairy / 11 red, smooth / 29 yellow, hairy / 9 yellow, smooth

Give a reasoned explanation along with the use of full genetic diagrams to proof your answer, to explain these results in terms of the simultaneous transmission of characteristics

a)   On crossing a plant with red fruit and hairy stem, with one that was yellow fruit and hairy stem, the following progeny were obtained:

           30 red, hairy / 11 red, smooth / 29 yellow, hairy / 9 yellow, smooth

Give a reasoned explanation along with the use of full genetic diagrams to proof your answer, to explain these results in terms of the simultaneous transmission of characteristics.