The vascular cambium is a plant tissue located between the xylem and the phloem in the stem and root of a vascular plant. Its functions is for secondary growth. It makes new phloem towards the outside of the plant and new xylem towards the inside. Good luck!
The correct answer is option (d) that is dizygotic twins.
The dizygotic twins also known as non-identical twins or fraternal twins, that is, two siblings who come from distinct eggs or ova, which are discharged at the similar time from an ovary and are fertilized by different sperm.
Answer:
-There is a variation in traits.
-The environment cannot support unlimited populations of organisms.
there is heredity.
-The trait that allows the organism to have more offspring will become more common in the population of organisms.
Answer:
9:3:3:1
Explanation:
This question involves two different genes coding for height and flower color respectively. The first gene posseses allele T (dominant) and t (recessive) while the second gene possesses allele P (dominant) and p (recessive).
According to this question, two heterozygous tall and purple flowers are crossed i.e. (TtPp x TtPp). Each parent will produce the following gametes combination:
TtPp - TP, Tp, tP, tp
Using these gametes in a punnet square, the following proportion of offsprings will be produced:
T_P_ (tall, purple) = 9
T_pp (tall, white) = 3
ttP_ (short, purple) = 3
ttpp (short, white) = 1
Hence, the ratio of this cross is 9:3:3:1