How do protists assist termites in digesting wood?
a. They protect the termites’ gut from damage from the cellulose fibers.
b. Enzymes produced by the protists break down carbon.
c. Protists absorb nutrients from the wood in the termites’ guts.
d. Enzymes produced by protists in the termites’ guts break down cellulose.
d. Enzymes produced by protists in the termites’ guts break down cellulose.
Protists assist termites in digesting wood by producing enzymes that break down cellulose. The wood fibers also provide food for the protists, creating a symbiotic relationship between the organisms.
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The small region of an inactivated X chromosome that is not inactivated contains ____________________ homologous to those on the Y chromosome
Fill in the blank(s) with correct word
Sickle-cell anemia is a disease that alters the structure of hemoglobin, and in turn, can cause severe health problems in individuals if left untreated
The disease is expressed in homozygous recessive individuals, whereas the heterozygous condition usually does not result in any symptoms of the disease. Sickle-cell anemia primarily affects Africans and Caucasians of Mediterranean descent. Typically, when a disease occurs only in the homozygous recessive condition, the incidence of the gene in the population is predicted to decline overtime, particularly when it can be detected either phenotypically or by genetic testing. In East Africa, the disease still occurs in about 40% of the population. Give an explanation for why the incidence of the disease has remained so high in African populations.
What conclusion was associated with mutant strain III in the accompanying figure?
a. It contained all the enzymes needed for normal metabolism.
b. It was missing all the enzymes for metabolism of amino acids.
c. It was missing the enzyme that catalyzes the conversion of citrulline to arginine.
d. It was missing the enzyme that catalyzes the conversion of ornithine to citrulline.
e. It was missing the first enzyme in the arginine metabolic pathway.
The human body’s “thermostat” is the hypothalamus
____________________ Indicate whether the statement is true or false.