Answer:
<em>The correct option is A. dihybrid</em>
Explanation:
A cross is drawn to generate the possible outcomes of traits being passed from parents to offsprings.
A monohybrid cross can be described as a cross in which only one trait is studied. For example, just studying the trait for eye colour.
A dihybrid cross can be described as a cross in which two traits are studies in a single cross. For example, studying the traits for eye colour and skin colour.
Answer:
It enters the citric acid cycle and associates with a 4-carbon molecule, forming citric acid, and then through redox reactions regenerates the 4-carbon molecule.
Explanation:
Acetyl-CoA(2C) associates with oxalacetate(4C) to form citric acid(6C). Then through redox reactions, CO2 molecules result from decarboxylation (COOH becomes R-(R1)CH-R2). And through dehydrogenation H2 molecules are incorporated in NADH+ in FADH2, resulting in the 4-carbon molecule at the beginning (oxalacetate). That's why it's called a cycle(Kreb's cycle or citric acid cycle)
Answer:
When a cell was examined under a microscope, it was found that it did not have a cell wall . It has a cell membrane which shows the viewed cell under microscope is an animal cell
Explanation:
Only plant cell has cell wall which gives rigidity and shape to the cell unlike animal cell which has a cell membrane. The cell would comprise of chloroplast, nucleus, golgi apparatus, mitochondria among others
Answer:
B) neurons have stable, relatively unchanging internal environments.
Explanation:
Rough endoplasmic reticulum (RER) is studded with ribosomes which in turn serve as the site for protein synthesis. A cell with an extensive network of rough endoplasmic reticulum has higher rates of protein synthesis. Mitochondria are the powerhouse of cells and serve as the site for aerobic cellular respiration. A large number of ATP molecules are produced in mitochondria. Therefore, a cell with relatively many mitochondria appears to have a higher demand for ATP and higher consumption of oxygen.
A cell with higher rates of consumption of ATP and protein synthesis should be functionally active. The charge across the membrane and the internal concentration of ions such as Na+, K+ of a neuron keep on changing during the conduction of nerve impulse. Therefore, the presence of many mitochondria and RER does not indicate that the neurons maintain relatively constant internal conditions.
