Chromosomes are made of a combination of DNA, carbohydrate, and lipid molecules.

a. true
b. false


Ans: b. false

Biology & Microbiology

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Which of the following represents the most

correct order of the organization of life from the smallest unit to the largest?

a. atoms ? molecules ? cells ??organisms ? populations ? communities ? ecosystems ? biosphere b. atoms ? molecules ? cells ??organisms ? communities ? populations? ecosystems ? biosphere c. atoms ? molecules ? cells ??organisms ? populations ? ecosystems ? communities ? biosphere d. communities ? biosphere ? organisms ? ecosystems ? populations ? cells ? molecules ? atoms e. biosphere ??organisms ??communities ? ecosystems ? populations ? molecules ??cells ? atoms

Biology & Microbiology

In insects, oxygen passes from the ______ to the tissues

a. cuticle of the epidermis to the blood b. tracheae directly c. tracheae to the blood d. lungs to the blood e. gills to the blood

Biology & Microbiology

The tip of an actively lengthening shoot is called a ____

a. flower stalk b. shoot cap c. lateral meristem d. terminal bud e. lateral bud

Biology & Microbiology

Which of these statements is true?

a. Environment can readily alter some genotypes. b. Genotype is manifested in phenotype. c. Genetic variation is easier seen than phenotypic variation. d. Variation dies with individuals. e. Phenotype is seen physically in the genotype.

Biology & Microbiology