During what part of the life cycle can an amphibian have both gills and lungs? Select one:

a.
metamorphic

b.
adult

c.
larvae

d.
egg

a.  metamorphic.

Explanation: During the metamorphic stage, the amphibians change from larvae into a full-grown adult. In this stage, the amphibians develop lungs and they have both lungs and gills until the gills disappear.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.