Fungi/Plants Part 3: Kingdom Plantae (Division Chlorophyta)

Question 1

What are the two ways Spirogyra can reproduce?

Answer 1

1. Fragmentation

2. Conjugation

Question 2

How does Fragmentation work in Spirogyra?

Answer 2

The algae breaks into two pieces and divide

Question 3

How does Conjugation work in Spirogyra?

Answer 3

Two spirogyra filaments line up parallel to each other and exchange nuclear material into one of the cells. That cell becomes a Zygospore. The Zygospore will later form new filaments by cell division.

Question 4

Why are algae significant to humans?

Answer 4

As the human population grows, we may have to turn to algae as a food source. They also are used in carrageenan, algin, agar, and fertilizer.

Question 5

What are the cycles that algae are involved in?

Answer 5

Algae are involved in the Carbon, Water, and Nitrogen cycle.

Question 6

True or False: Algae are primary producers and produce 90% of all oxygen.

Answer 6

False: Algae produce 50% of all oxygen.