Which of the following is the most recent plant adaptation to have evolved?

A. Vascular system
B. Flowers
C. Seeds
D. Cones


Answer: B

Biology & Microbiology

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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

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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.

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology