20. In an investigation to determine the change in heart rate with increased activity, a biology
teacher asked students to take their pulses im-
mediately before and immediately after exercis-
ing for 2 minutes. The data showed an average
heart rate of 72 beats per minute before exercis-
ing and 90 beats per minute after exercising, if a
valid conclusion is to be made from the results
of this investigation, which assumption must be
made?
1 In most students, the average heart rate is not
affected by exercise,
2 Each student exercised with the same inten-
sity.
3 Exercise causes the heart rate to slow down

How did the work of farmers and breeders in england influence the work of charles darwin

This problem has been solved! see the answeryou are investigating two traits in fruit flies controlled by one gene each. the b gene controls for body color (black or brown), while the r gene controls for body sculpture (rugose or smooth). after crossing rugose black flies with smooth brown flies, you obtain an f1 generation of 100% smooth black flies. what are the dominant alleles? (1 pt)what are the genotypes of the two parent flies to perform a dihybrid test cross? (1 pt)after running a dihybrid test cross, you find 1000 offspring with the following phenotypes: , rugose406black, smooth86brown, rugose94brown, smooth4141000fill in the expected column with the expected number of offspring in each class of phenotypes. (1 pt)what phenotype classes represent the recombinant offspring? (1 pt each)calculate the relative genetic distance between the body color gene and the body sculpting gene (show your work). (1 pt).

Which individual would be the safest from a lightening strike? a. a person standing 8 miles away b. a person on a bike 8 miles away c. a person in a tent 8 miles away d. a person in a house 8 miles away select the best answer from the choices provided a b c d