Answer:
False.
Explanation:
The radiation weighting factor for x-rd is 1.0.
Answer:
Option a. is correct
Explanation:
A mutation refers to a change in our DNA sequence which causes it to break down. It occurs due to the following reasons:
1. Due to mistakes when the DNA is copied
2. Due to environmental factors such as UV light, smoking.
3. Exposure to specific chemicals or radiation
The mechanism for reactive oxygen species to cause mutation is that bases are oxidized to a variety of different products which might pair with a different base than the original base would have.
Answer:
C. Muridae
Explanation:
The family Muridae includes mammals such as rats and mice. Some of the specific features of the members of family Muridae are the absence of premolars. Most of these mammals have three ever-growing molars. According to the species, these mammals may be herbivorous carnivorous or omnivorous. They have four claws on each front foot and five claws on the hind feet. The rodent mammals are classified under the order Rodentia. The house mouse species belong to the genus Mus.
Answer:
What type of plants are extinct?
Explanation:
Prehistoric extinctions
Cooksonia.
Archaefructus.
Abies milleri.
Dillhoffia.
Trochodendron nastae.
Araucaria mirabilis.
Araucarioxylon arizonicum.
Sphenophyllum miravallis.
