deoxygenated blood from the right ventricles to the lungs
oxygenated blood from the right ventricle to the lungs
oxygenated blood from the left ventricles to the ventricles to the right auricle
deoxygenated blood from the left ventricles to the right auricles
oxygenated blood from the lungs to the right auricles
Correct answer is A
No explanation has been provided for this answer.
Double fertilization is said to occur in flowering plants because?
two embryos are formed
one egg is fertilized twice
two sperms fertilize each egg
one embryo and endosperm nucleus are formed
two sperms and two pollen grains are involved
Correct answer is D
This process involves joining a female gametophyte with two male gametes.
It begins when a pollen grain adheres to the stigma of the carpel, the female reproductive structure of a flower.
Which of the following statements best explain the meaning of homologous chromosomes?
Product of division of chromosomes
two identical chromosomes from each parent
chromosome arranged on spindle fiber during cell division
chromosome arranged on the equatorial plate of the cell
Daughter chromatid in the first meiotic division
Correct answer is B
No explanation has been provided for this answer.
an allele
a sickle-cell gene
a dominant gene
a chromosome
a sex-linked character
Correct answer is C
No explanation has been provided for this answer.
A bat's wing and that of a bird, a whale's flippers and the fish's fin are examples of?
adaptive radiation
vestigial structures
continuous variation
convergent evolution
divergent evolution
Correct answer is D