Large zooplankton decrease the ecosystem's main productivity when they are abundant
Indicate whether the statement is true or false.
ANSWER: True
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Which chromosomal change rarely has an effect on the phenotype of the individual who carries it?
A. Robertsonian translocation B. Unbalanced translocation C. Balanced translocation D. Chromosome loss
Lichens take up nutrients and pollutants from airborne dust, so many cannot survive where the level of air pollution is high. The U.S. Forest Service monitors lichens on tree trunks as part of its program to assess the health of forest communities. Lichen is a(n) ____
a. pioneer species b. indicator species c. primary succession species d. keystone species e. exotic species
Which area of an intertidal zone is typically covered by water at high tide, but is dry at low tide?
a. upper littoral zone b. midlittoral zone c. lower littoral zone d. limnetic zone e. profundal zone
Define the term speciation
What will be an ideal response?