Other Biology Answers

A disadvantage of gas exchange in aquatic habitats, as compared with terrestrial habitats, is that
A. Gas exchange surface tends to collapse in water
B. Water current are too slow for most types of surfaces
C. Oxygen concentration in water is much lower than in air
D. Carbon dioxide concentration in water is much lower than in air
E. Oxygen concentration in water is higher than in the air

the lowest water potentials in the xylem are in the
A. roots hairs
B. vascular cylinders of roots
C. tracheids of the stem
D. leaves
E. lateral root

in tomato plants, round shape (R) is dominant to wrinkled (r) Yellow color (Y) is dominant to green (y). If heterozygous plants cross with recessive homozygous plants will give phenotype ratio of:
A. 1:1:1:1
B. 9:3:3:1
C. 9:3:4
D. 12:3:1
E. 15:1

an action potential is an electrochemical change because it consist of polarity changes brought about by the movement of
A. Na^+ and Ca^+
B. K^+ and Ca^+
C. Na^+ and Ag^2+
D. Na^+ and Hg^+
E. Na^+ and K^+

a young couple has been arguing about their son who has O blood type, meanwhile they are having A and B blood type. what might explain this outcome?
A. the husband is homozygotic B and his wife is heterozygotic A
B. The husband is heterozygotic A and his wife is heterozygotic B
C. the husband is heterozygotic B and his wife is homozygotic A
D. the husband is heterozygotic B and his wife is heterozygotic A
E. both of B and D are correct

which one of these scientific method steps that needs inductive reasoning?
A. explanation
B. conclusion
C. researching the scientific literature
D. formulating the hypothesis
E. both B and D are correct

Does foraging behaviour vary among individuals in the population of zebra finches?

when performing an experiment you must always run a(n) ______________ to see if something happened.

Is painkiller necessary ?

animals with four appendages or limbs refereed to as