"protist reproduction" is always asexual fission. is always sexual with the adult haploid. is always sexual with the adult diploid. is always sexual with alternation of haploid and diploid generations. may be asexual or any of these sexual cycles.

May be asexual or any of these sexual cycles

Explanation:

Most of the protist living things reproduce by asexual processes like binary fission (when a living thing split in two including organelles and DNA like amoebas), multiple fission (where the nucleus of a cell split several times, having several new nucleus for the new living things like the algae or sporozoas),  and budding (when a new baby nucleus born next to the mother cell until it has is own structure).

When they have the sexual reproduction can be either by conjugation (when two gametes join to form a new complete structure like in molds an green algae) or alternation of generations (in which the sexual reproduction system is present in one generation and then in the next one is asexual reproduction).

stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.

9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.