Conducting tubes of phloem consist of stacks of ____

a. dead sieve elements
b. living sieve elements
c. dead vessel elements
d. living vessel elements
e. dead companion cells


ANSWER: b

Biology & Microbiology

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The last two remaining females in this population disperse to join a different population that is

50 km away. Breeding with males in this new population would introduce new genes and is an example of __________.

a. alleles b. gene flow c. meiosis d. adaptive radiation

Biology & Microbiology

Mammals are thought to be living descendants of which of the following lineages?

a. anapsids b. archosaurs c. lepidosaurs d. synapsids e. diapsids

Biology & Microbiology

STDs caused by viruses can be effectively treated with antibiotics.  

Answer the following statement true (T) or false (F)

Biology & Microbiology

Specialized epidermal outgrowths that remove excess salt accumulated in seashore plants are an example of:

a. plasmodesmata. b. guard cells. c. stomata. d. sclereids. e. trichomes

Biology & Microbiology