Chromosomes are made of a combination of DNA, carbohydrate, and lipid molecules.
a. true
b. false
Ans: b. false
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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
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
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
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.