Choose the statement that explains the difference between the diatom colony and the more advanced Spirogyra. Select one: a. The diatom cells are not interconnected and are very similar to diatoms that are living unicellularly. The Spirogyra cells are the building blocks of the filaments. b. The diatoms are protected by cellulose cell walls. The Spirogyra are protected by silicate shells that could link together to form several larger structures. c. The diatoms are only photosynthetic thanks to symbiotic algae. The Spirogyra have their own chloroplasts. d. The diatoms do not have any specialized structures. The Spirogyra have specialized structures, such as holdfasts and leaves.

Nhumans, abo blood types refer to glycoproteins in the membranes of red blood cells. there are three alleles for this autosomal gene: ia, ib, and i. the ia allele codes for the a glycoprotein, the ib allele codes for the b glycoprotein, and the i allele doesn't code for any membrane glycoprotein. ia and ib are codominant, and i is recessive to both ia and ib. people with type a blood have the genotypes iaia or iai, people with type b blood are ibib or ibi, people with type ab blood are iaib, and people with type o blood are ii. if a woman with type ab blood marries a man with type o blood, which of the following blood types could their children possibly have? in humans, abo blood types refer to glycoproteins in the membranes of red blood cells. there are three alleles for this autosomal gene: ia, ib, and i. the ia allele codes for the a glycoprotein, the ib allele codes for the b glycoprotein, and the i allele doesn't code for any membrane glycoprotein. ia and ib are codominant, and i is recessive to both ia and ib. people with type a blood have the genotypes iaia or iai, people with type b blood are ibib or ibi, people with type ab blood are iaib, and people with type o blood are ii. if a woman with type ab blood marries a man with type o blood, which of the following blood types could their children possibly have? a, b, ab, and o ab and o a, b, and o a and b

Tropical rain forests support more species per unit area than any other terrestrial ecosystem. what is one way rain forests are important to the health of the biosphere?

Which of the following human activities resulted in the growth of the north american deer population?