Mycorrhizae are associations formed by fungi that grow on the roots of trees. these fungi penetrate into the roots of the trees. the trees produce energy through photosynthesis and share it with the fungi. the fungi act as decomposers, breaking down dead organic matter to provide nutrients for the trees to grow. what kind of a relationship is exhibited in this example? the fungi share a mutualistic association with the trees. the fungi are a parasite for trees. the fungi share a commensal association with the trees. the fungi are predators for the trees.

The fungi share a mutualistic association with the trees.

Mutualism is a relationship among two species, in which two species lives in close association with each other. In this relationship both the species are benefited.  

The given situation, is an example of mutualistic association of the fungal species with the tree. This is because of the fact that the fungal species provides trees with nutrients after the process of decomposition, that are necessary for the growth of the trees. In return the fungal species obtains carbohydrates produced by photosynthesis from the roots of the trees. Therefore, both the species are benefited hence, it is a mutualistic association.

 A.

The fungi share a mutualistic association with the trees.

Explanation:

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an individual’s sex (i.e., whether they are a male or female) is determined by the sex chromosomes. most people have two sex chromosomes, one that is inherited from their mother and one that is inherited from their father. typically, females have two x chromosomes (xx) and males have one x chromosome and one y chromosome (xy). conditions caused by changes (“mutations”) in genes located on the x chromosome are considered x-linked.

x-linked recessive inheritance

most x-linked conditions are recessive. this means that in a person with two x chromosomes (most females), both copies of a gene (i.e., one on each x chromosome) must have a change or mutation whereas in a person with one x chromosome (most males), only one copy of a gene must have a mutation. a female with a mutation in one copy of a gene on the x chromosome is said to be a “carrier” for an x-linked condition. a male with a mutation in a gene on the x chromosome is typically affected with the condition. because females have two copies of the x chromosome and males have only one x chromosome, x-linked recessive diseases are more common among males than females. however, x-linked recessive diseases can occur in both males and females.

for x-linked recessive disorders, an unaffected carrier mother who has a mutation in a gene on the x chromosome can transmit either the x chromosome with this mutation or a “normal” x chromosome to her children. if the father is unaffected, none of her daughters will be affected and all of her daughters will be unaffected—since they will inherit at least one normal x chromosome from their father. however, each daughter will have a 50% chance of being an unaffected carrier like her mother and a 50% chance of both x chromosomes being normal.