Answer:
absorption of oxygen
Explanation:
the others would not make sense so i think this is the answer
The statement that best compares gymnosperms and angiosperms is : A. Both reproduce sexually, but gymnosperms contain only xylem and angiosperms contain xylem and phloem.
Gymnosperms produce exposed seeds, not enclosed in fruit whilst Angiosperms have Fruits, flowers, and endosperms as defining characteristics.
C. a green parrot has an allele for green feathers and an allele for blue feathers.
Which mode of inheritance produces heterozygotes with phenotypes that differ from either homozygote but typically more closely resembles one homozygous phenotype than the other?"
A) complete dominance
B) incomplete dominance
C) codominance
D) epistasis
E) incomplete penetrance
Answer:
B) incomplete dominance
Explanation:
Incomplete dominance occurs when the dominant allele of a gene is not able to mask the expression of the recessive allele completely. This results in the expression of a phenotype in the heterozygous genotypes that differ from both homozygous genotypes. However, the phenotype of the heterozygote is closer to one of the homozygous genotypes.
For example, the petal color in four o'clock plant is controlled by a gene with two alleles R and r. Here, the "R" allele can not produce enough pigment in heterozygous conditions to completely mask the expression of the "r" allele and the phenotype of the "Rr" plant is "pink". On the other hand, the phenotype of "RR" plant is red while that of the "rr" plant is "white".
