20. in some types of wheat, color is caused by two sets of alleles. to produce a red cuiui, bou om
b, are needed. white results from having both recessive alleles in the homozygous state, rrbb. any one
ombination produces brown wheat grains. a strain with a genotype of rrbb is crossed with a strain of wheat with
a genotype of rrbb. what is the color of each of the parent strains?
rrbb color
ribb color
what colors of wheat result from this cross, and what is the probability for each color?

the right answer is a. skin cells forming from sunlight.

the liver is an organ endowed with a fantastic ability to regenerate

. thus, if a hepatectomy (ablation) of 70% of the hepatic mass is performed in the rat, there is complete recovery in 7 to 10 days.

prokaryotes are beings that have existed since the existence of life on earth, and do not come from another realm.

ribosomes are organelles that exist naturally in eukaryotes, either in free form or attached to the endoplasmic reticulum.

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the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.