Test 2 Review Questions -- Kingdom Plantae and Hallmarks of the Land Plant Life Cycle

Question 1

All sexual life cycles involve the alternation of ____ and ____.

Answer 1

Syngamy (fertilization), meiosis

Question 2

Haplobiontic

Answer 2

singular multicellular life form

Question 3

Diplobiontic

Answer 3

two multicellular life forms

Question 4

Why do we modify haplobiontic with “-haploid” or “-diploid”?

Answer 4

To indicate ploidy of multicellular form

Question 5

Land plants have what kind of life cycle?

Answer 5

Diplobiontic

Question 6

How do we refer to diplobiontic life cycles with respect to its gametes?

Answer 6

Oogamy

Question 7

Oogamy

Answer 7

sexual reproduction involving a small motile male gamete and a large much less motile female gamete

Question 8

What life phase produces the spores in a diplobiontic life cycle?

Answer 8

Sporophyte

Question 9

What kind of division produces sporophytes?

Answer 9

Meiosis

Question 10

What ploidy are spores?

Answer 10

Haploid

Question 11

What do spores produce?

Answer 11

Gametophyte

Question 12

By what type of division do gametes arise in a diplobiontic life cycle?

Answer 12

Mitosis

Question 13

What life phase produces gametes?

Answer 13

Gametophyte

Question 14

Where does multicellular development occur in a haplobiontic-haploid life cycle?

Answer 14

Haploid phase

Question 15

Where does multicellular development occur in a haplobiontic-diploid life cycle?

Answer 15

Diploid phase

Question 16

Where does multicellular development occur in a diplobiontic life cycle?

Answer 16

In both haploid and diploid phase

Question 17

Does it make sense to use the terms “gametophyte” and sporophyte in a haplobiontic life cycle? Why/why not?

Answer 17

Not really – terms arise from the fact that multicellular entities exist in both life phases.

In the haplobiontic life cycle, there is only one life phase, so they don’t need a distinguishing name.

Question 18

What would it take to convert a haplobiontic-haploid life cycle to a diplobiontic life cycle?

Answer 18

If meiosis is delayed, the zygote could divide by mitosis and become a multicellular life form.

Question 19

What would it take to convert a haplobiontic-diploid life cycle to a diplobiontic life cycle?

Answer 19

If fertilization is delayed, gametes could divide by mitosis and become multicellular life forms.

Question 20

What shared derived character(s) separate the land plants from their algal relatives?

Answer 20

• Embryo
• Diplobiontic Life Cycle