which of the following is an obstacle to creating computer based models for tracking hurricanes A. Hurricanes form over water, where it is difficult to observe them. B. Most sources of data about hurricanes are anecdotal and unreliable. C. Forecasters must consider a large number of variables that affect the path of the storm. D. All of the above

Answer: The correct answer is Mouth, Pharynx, Esophagus, Stomach, and Small intestine.

Alimentary canal is also known as digestive tract. It represents a pathway through which food is first taken in, then allowed to digest and finally the undigested food in released through anus.

From the given options, the structures included in the alimentary canal are (in the order)- Mouth- Pharynx- Esophagus- Stomach- Small intestine.

Mouth is the structure that ingests the food. Digestion begins in the mouth itself. It starts the digestion of carbohydrates through salivary amylase enzyme.

Pharynx is a muscular flap that aids the movement of food in the esophgus, which helps in the swallowing through peristaltic movements.

Stomach lies after esophagus. Protein digestion takes place in stomach.

Small intestine is a coiled tubular structure where complete digestion of food takes place. It is also the site of absorption of nutrients.

Chromosomes are inherited from the parents. One chromosome from each of 23 pairs came from each of the parents. The two chromosomes of a pair (except for the sex chromosomes) contain the same genes, but the genes have small differences. The X and Y Chromosomes determine the organism’s sex. One chromosome pair - the sex chromosomes - is unique. Typically females have two X chromosomes and males have an X and a Y. Mothers always pass an X chromosome on to their children. Whether the father passes on his X chromosome (leading to a pair of X chromosomes) or his Y chromosome (making a mixed set) determines your sex. Chromosomes get shuffled when eggs and sperm are made. Though most adult cells contain two sets of chromosomes, sperm and egg cells are different. These special cells have just one chromosome from each pair. Which chromosome they get from each pair is random, making each sperm or egg cell unique. There is also a bit of mixing before the chromosomes are sorted into individual sperm or egg cells. Chromosomes from each pair in a mother or father, respectively, make contact and exchange pieces of DNA, creating hybrid chromosomes. 

Answer:

Explanation:

genes and DNA code for the production of proteins, which can cause traits to be expressed .

The right answer is A (substitution).

-A-A-G-T G-C-

-A-A-A-T G-C-

In genetics, point mutation is the generic terminology used to describe a mutation that causes a structural change in a gene. This type of mutation can impact between one and ten nucleotides. Insertion mutation, deletion mutation and substitution mutation are the three forms of existing point mutations.

Cytokinesis is the last stage of mitosis where the parent cell fully splits into two identical daughter cells.