The outermost layer of plant stems in discotyledons consists of epidermal cells and guard cells that surround opening called stomata. The epidermal cells are usually covered whit a waterproof layer that provides protection from injury and water loss. The stomata allow gas exchange. The epidermal cells and stomata have function similar to those of which two human body system

If the coding part of an mrna molecule is 1800 nucleotides (bases) in length, this molecule will contain codons and code for a polypeptide that is amino acids long.

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

Atest cross can be used to -predict the phenotypes of a monohybrid cross -predict an unknown genotype of a purebred dominant plant -cross-breed dominant and recessive plants -give probabilities that a trait will appear