1. Griffith in his experiment used two related strains of bacteria (Streptococcus pneumonia), known as R and S and mice, trying to develop a vaccine against pneumonia. R strain-formed nonvirulent, rough-edged colonies
S strain- rounded and smooth colonies, with sugar protection coat, virulent
Mice that were injected with S strain developed pneumonia and died.
But, when mice were injected with heat-killed S strain it did not cause disease in mice.
The next part of experiment is the injection of combined harmless R bacteria with harmless heat-killed S bacteria. The result was that the mouse developed pnenumonia and in blood sample from the dead mouse, living S bacteria were found.
2. From his experiment, Griffith concluded that injected together, R strain and S strain bacteria most likely “communicate”. The R-strain bacteria took "transforming principle" (we know today that this is genetic material DNA) from the heat-killed S bacteria which allowed them to "transform" into virulent bacteria.
Answer:
energy is lost when a phosphate molecule is removed
Answer:
meiosis you will have four haploid cells (half the number of chromosomes is a diploid cell) and after mitosis you will have two diploid cells
Explanation:
Mitosis you begin with a parent cell that is haploid, it copies all it's chromosomes and splits so each daughter cell have the same number of chromosomes as the parent cell so both being diploid
In meiosis the chromosomes fold over DNA and are put in pairs, in the first division the pairs are split up evenly into two cells randomly (diploid still) but the the cells split the chromosomes in half in them creating four grneticly different haploid cells
Answer:
Lipids: Carbon, Hydrogen and Oxygen - monomers are glycerol and fatty acids.
Proteins - Carbon, Hydrogen, Oxygen and Nitrogen - monomers are amino acids
Carbs - No Phosphate. Carbon, Hydrogen and Oxygen - H:O ratio is 2:1 - monomers are (may have a ring structure)
Nucleic Acids - Examples are DNA and RNA. Carbon, Hydrogen, Oxygen, Nitrogen and Phosphate - monomers are nucleotide (sugar, phosphate, nitrogen base)
Lipids and proteins contain carbon, hydrogen, and oxygen. Both monomers are from certain types of acids. Carbs also contains carbon, oxygen, and hydrogen like lipids and proteins do. Carbs have monomers. Nucleic acids contain the same things founds in all three major macro molecules. Nucleic acids have nucleotide.
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Answer:
The top of a worm is the dorsum or it can be said to be the
dorsal surface.
