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some unicellular organisms use this organelle to maintain the water concentrations. This allows the organism to live in a wide range of environments
What of the following best describes Transcription?
a)The making of tRNA from a DNA segment.
b)The making of an rRNA strand from a DNA segment.
c)The making of an mRNA strand from a DNA segment.
d)Making a copy of DNA into DNA
a)The making of tRNA from a DNA segment.
b)The making of an rRNA strand from a DNA segment.
c)The making of an mRNA strand from a DNA segment.
d)Making a copy of DNA into DNA
Biology
What is the technical term for a plant hair
How many times must a molecule of oxygen pass through a cell surface membrane as it diffuses from inside an alveolus, through a cell in the capillary wall, to bind to a molecule of haemoglobin?Explain
There are two popular theories currently debated concerning the origins of
hominids. Name the two theories and expatiate (supportive arguments) on the
out of Africa theory.
hominids. Name the two theories and expatiate (supportive arguments) on the
out of Africa theory.
Fragile X syndrome (F or f) is a dominant X-linked disease that often causes autism or autism like symptoms. Poindexter has Fragile X and marries Allie who does not. Using a Punnet Square give the likelihood of having children with Fragile X.
Poindexter’s genotype _________ phenotype ____________
Allie’s genotype _________ phenotype ____________
Percent of sons with Fragile X _________
Percent of daughters with Fragile X _______
Poindexter’s genotype _________ phenotype ____________
Allie’s genotype _________ phenotype ____________
Percent of sons with Fragile X _________
Percent of daughters with Fragile X _______
Rh factor (D and d) is a factor located on red blood cells (RBC) of humans: specifically, it is a glycolipid on the RBC membrane. Rh+ has the glycolipid while Rh- does not. It displays simple Mendelian inheritance with Rh+ being dominant. Joe has Rh- blood and his wife Sue has Rh+. They have a child who is Rh+. Show this in a Punnet Square.
explain how allosteric regulators may inhibit or stimulate the activity of an enzyme
True or False
Transition from a cis to trans-fatty acid in the phospholipid bilayer reduces fluidity of cell membranes.
Transition from a cis to trans-fatty acid in the phospholipid bilayer reduces fluidity of cell membranes.
1. Reptile question:Discuss how the extraembryonic membranes of the amniotic egg provide the growing requirements of the developing embryo. [5 marks]
2. Mammal question:Compare and discuss true horn and antlers?
3. (a) Provide a brief overview of gas exchange strategies and organs found in the Class Amphibia
(b) Discuss the unique breeding season structures of the African anuran Trichobatrachus robustus and what advantages that these structures are believed to confer.
4. Discuss osmoregulation in a seawater Actinopterygii fish. In your answer, include the problems faced by the fish, the organs used by the fish and the osmoregulatory function of each organ
2. Mammal question:Compare and discuss true horn and antlers?
3. (a) Provide a brief overview of gas exchange strategies and organs found in the Class Amphibia
(b) Discuss the unique breeding season structures of the African anuran Trichobatrachus robustus and what advantages that these structures are believed to confer.
4. Discuss osmoregulation in a seawater Actinopterygii fish. In your answer, include the problems faced by the fish, the organs used by the fish and the osmoregulatory function of each organ
