Choose the most appropriate description for each item.
A. Lysosomes
B. Ribosomes
C. Golgi bodies
D. Mitochondria
E. Nucleoli
F. RNA molecules
G. Central vacuoles
H. DNA molecules
I. Microtubules
J. Chloroplasts
A. Contain enzymes for intracellular digestion
B. Primary cellular organelles where proteins are assembled
C. Package cellular secretions for export
D. Extract energy stored in carbohydrates; synthesize ATP; produce water and carbon dioxide
E. Synthesize subunits that will be assembled into two-part ribosomes in the cytoplasm
F. Molecules that participate in protein synthesis
G. Store substances
H. Encode hereditary information
I. Help distribute chromosomes to the new cells during cell division
J. Convert light energy to chemical energy stored in the chemical bonds of glucose or starch
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Adaptations that evolved in the group of animals called the _____ have allowed them to complete their life cycles entirely on land
Fill in the blank(s) with the appropriate word(s).
What term is used to describe the situation when the loss of an allele because of selection against one of its phenotypes is balanced by natural selection in favor of the allele for another phenotype?
A) equilibrium frequency B) heterozygote fitness C) restriction fragment length polymorphism D) single nucleotide polymorphism E) balanced polymorphism
Which of the following was a challenge to the survival of the first land plants?
A) too much sunlight B) a shortage of carbon dioxide C) desiccation D) animal predation
Which one of the following statements about haplodiplontic life cycles is false?
A. For each gene, cells of the gametophyte stage have a single allele. B. Spore mother cells produce haploid spores by meiosis. C. The gametophyte stage produces gametes by mitosis. D. The zygote is the only diploid cell in the sporophyte stage. E. Mitosis occurs in both sporophyte and gametophyte stages.