Answer the below question choosing either a, b,c, d

Which of the following shows the changes that occur in the cardiovascular system during physical activity?

a) Increased heart rate, increased blood pressure, increased respiration rate

b) Increased heart rate, decreased blood pressure, increased respiration rate

c) Decreased heart rate, increased blood pressure, increased respiration rate

d) Decreased heart rate, decreased blood pressure, decreased respiration rate

Read the following scenario to answer the following question. in some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. applying the biological species concept, the sterility of ligers reveals that a. lions are probably a subspecies of tigers b. tigers and lions are the same species c. a new species called "ligers" is forming d. tigers and lions are separate species

Draw the structure of dna nucleotide with adenine as nitrogenous base

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell