Answer: The second option.
Carbohydrate digestion starts in the mouth and protein digestion starts in the stomach.
Carbohydrate digestion starts in the mouth by the mechanical activity of chewing and saliva from the salivary amylase, an enzyme in the salivary glands.
Protein digestion occurs in the stomach where three main enzymes, pepsin secreted by the stomach, and trypsin and chymotrypsin secreted by the pancreas. The enzymes would break down the food proteins into polypeptides and into smaller and smaller pieces until they are amino acids.
Answer:
Explanation:
All of them except "bacteria do not have chromosomes" is correct
Answer:
This zygote is tetraploid.
Explanation:
An haploid cell contains a single set of chromosomes (one chromosome 1, one chromosome 2, one chromosome 3, etc.).
A diploid cell contains two sets of chromosomes (two chromosomes 1, two chromosomes 2, etc.).
Usually, two haploid gametes fuse and generate a diploid zygote, that has a set of chromosome from one parent and another set from the other parent.
If during meiosis the generated gametes are diploid instead of haploid, the resulting zygote from that fusion will have four copies of each chromosome. An organism that has four sets of chromosomes (four chromosomes 1, four chromosomes 2, etc.) is called tetraploid.
The mantle is the most dense (pretty sure at least)
Transitional fossils are fossils that are "between" some species, for example that have traits of Homo Sapiens and its ancestor species, Homo Heidelbergensis (or homo erectus).
They show the evolutionary steps between species. - the correct answer is a.