The typical osmolarity of body fluids in most marine invertebrates is

a. ~5 mOsm/L.
b. ~225 mOsm/L.
c. ~300 mOsm/L.
d. ~1000 mOsm/L.
e. ~1500 mOsm/L.


D

Biology & Microbiology

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The disease, sickle-cell anemia is common in malaria-infested areas because individuals that are heterozygous for the gene (AS) have enhanced resistance to malaria over normal individuals (AA). Individuals with severe sickle-cell anemia (SS) usually die before reproduction. If this population moves to an area without malaria, what will happen to the allele frequency of the A allele over time?

A.  It will go up because there is no sickle cell anemia. B.  It will go down because there is no malaria. C.  It will go down because there is no sickle cell anemia. D.  It will go up because there is no malaria.

Biology & Microbiology

In the waiting room of a doctor's office, the staff are creating an educational display about varieties of birth control. What general categories of birth control will they want to outline?  

_____  drugs that block gonad development _____  devices to prevent implantation _____  hormones to close cervix _____  hormones to prevent ovulation _____  hypothalamic implants _____  nasal spray for males _____  sperm barrier _____  sperm destruction _____  surgical sterilization _____  abstinence

Biology & Microbiology

Small bronchioles contain ________.

A. smooth muscles B. cartilage rings C. cilia D. two of the above

Biology & Microbiology

According to Mendel, if a male that is homozygous for the dominant form (PP) of a trait is crossed with a female that is homozygous for the recessive (pp) form of a trait, all offspring will show the ____ form of the trait.

A. sex-linked B. dominant C. recessive D. codominant E. lethal

Biology & Microbiology