A sex-linked trait is a trait that is carried by the X chromosomes in females but it is not expressed(the phenotype). Females are only carriers because they have two copies of the X chromosome [one of them carries the trait and the other does not]. Males who inherit one copy of the X chromosome often get the trait (because the trait is in either one copy or the other of the X chromosome) and express it while their Y chromosome would became recessive. Thus, only males express sex-linked traits such as hemophilia or color blindness
The answer is "D"
The body's first line of defense is also known as Innate immunity and incudes mucous membranes. Both the intact skin and mucous membranes of the body offer a high degree of protection against pathogens.
A good example is the mucous membrane of the respiratory tract. It is lined up with cilia and covered with mucus. The coordinated beating of the cilia drives the mucus up to the nose and mouth where the trapped bacteria can be expelled.
(Lymph nodes and white blood cells belong to the second line of defense, not the first)
Answer:
Increase the genetic diversity by introducing other subspecies of cougar to the population.
Explanation:
- Genetic diversity is the total number of genetic makeup of species. It includes the number of species that have differences within the species and is distinguished from the genetic variability.
- The genetic diversity services allow for the population to adapt to the environment and continue to generate more. Thus introducing the subspecies of cougar can be done to save the species from getting extinct.
Answer:
Bacteria have cytoplasm and ribosomes which are common with the cells of other living organisms.
Explanation:
ANSWER:
Index Fossils can be used to identify a specific period of time
