Which of the following statements about secondary succession is true? a. Secondary succession occurs in ecosystems that have no vegetation.
b. Secondary succession affects ecosystems that are already established.
c. Ecosystems require pioneer species to undergo secondary succession.
d. Secondary succession can occur in areas without soil.

Edgenuity2020

Where do homologous chromosomes exchange genetic material through crossing over?               a.  chlorophyll    b.  centrosomes    c.  centromeres    d.  chiasma

When explaining dominant and recessive traits to a younger family member, they respond, "well chances are i can probably taste ptc, since dominant traits are more common." how might you address this misconception?

Directions: read the descriptions of the four islands presented in the lesson. 1. list two new traits that each new species of rat might demonstrate as it adapts to the conditions on each island. 2. introduce one of the four new rat species to another island and describe one challenge it would encounter and one success as it adapts to its new environment.