Which of the following types of greenhouse protection is best suited to providing a controlled environment for extensive field crops such as strawberries or flowers? polytunnel

cold frame

alpine

Quonset-style

List two modern organisms that have pentameral symmetry

Which statement about dna replication is true? a. eukaryotes only have one circular chromosome that unwinds at multiple locations. b. eukaryotes can only replicate one segment of a chromosome at a time. c. prokaryotes can only replicate their single circular chromosome in the nucleus. d. prokaryotes only have one origin of replication to initiate replication.

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these