A scoop of healthy and productive soil contains 1.0 × 108 bacteria and 3.0 × 106 protozoa. How many total microscopic organisms exist in this scoop of soil? 1.03 × 106

4.0 × 108

1.03 × 108

4.0 × 1014

There are a total of 1.03 * 10⁸ microscopic organisms in the soil

Explanation:

The scoop of healthy soil contains each of the following number of microscopic organisms:

i) 1.0 * 10⁸ bacteria

ii) 3.0 * 10⁶ protozoa

The total number of microscopic microorganisms present will be the sum total of bacteria and protozoa = 1.0 * 10⁸ + 3.0 * 10⁶

Converting 3.0 * 10⁶ to a number with a power of 8 = 0.03 * 10⁸

The total number of microscopic microorganisms present  = 1.0 * 10⁸ + 0.03 * 10⁸ = 1.03 * 10⁸ organisms

Therefore, there are a total of 1.03 * 10⁸ microscopic organisms in the soil

the answer is: trichonympha lives in the gut of termites and digests cellulose eaten by the termite.

this is an example of a symbiotic association of a protozoan with its mode of association.

hope i

-lavira: )

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.