Which of the following is the most recent plant adaptation to have evolved?
A. Vascular system
B. Flowers
C. Seeds
D. Cones
Answer: B
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The sum total of all the resources we use is called the ____
a. demographic transition model b. age-structure diagram c. habitat d. ecological footprint e. transitional age
The best way to directly observe Treponema pallidum is through ________ microscopy.
A. bright-field B. scanning electron C. dark-field D. phase contrast E. fluorescent
Palisade mesophyll is a tissue typically found on the side of the leaf toward the upper epidermis. Indicate whether the statement is true or false
During sexual reproduction, novel mixtures of alleles are generated. This is because ______
(a) in all diploid species, two alleles exist for every gene. (b) a diploid individual has two different alleles for every gene. (c) every gamete produced by a diploid individual has several different alleles of a single gene. (d) during meiosis, the segregation of homologs is random such that different gametes end up with different alleles of each gene.