The western toad belongs to the large toad specie. It is between 2.2 inches to 5.1 inches long. Its scientific name is Anaxyrus boreas. Its dorsal stripe is either white or cream in color. It has no cranial crest. Skin color is either greenish or dusky gray. A distinguishing feature are the oval parotoid glands found behind the eyes. The western toad can be found in desert streams and springs, wet or dry mountain meadows and ponds or open water for breeding.
Answer: b. to form RNA molecules form DNA
Answer:
FALSE
Explanation:
In the periodic table, vertical columns are called GROUPS.
This is a FALSE statement
The horizontal rows on the periodic table are called periods.
Answer:
The X-shaped structure is made of strands of DNA.
Explanation:
The chromosomes are thread-like structures located in the nucleus of each cell in the body. In a human cell, there are 23 pairs of chromosomes found in the nucleus. Each chromosome is made up of strands of DNA tightly coiled many times around proteins called histones which gives support to its structure.
The chromosomes are X-shaped and are observed only in a cell undergoing division by mitosis or meiosis. Each of these X-shaped chromosomes consists of two identical sister chromatids. The sister chromatids are connected to each other by a region of the chromosome called the centromere. The centromere are located around the depression point of the chromosome which divides the sister chromatids into two regions: long arm called the q arm and a shorter arm called the p arm. During mitosis, spindle fibers attach to this region, and they eventually pull the sister chromatids apart to form two separate chromosomes, one for each daughter cell.
