Question

meiosis and unequal cytoplasmic division in seed plant __ produce three small cells that disintegrate and one large megaspore
pollen sacs
pollen grains
gametophytes
microspores
ovules
question 18 (2.5 points)
most members of the phylum __ are molds that grow on or through organic matter as a mass of hyphae
chytridiomycota
zygomycota

Explanation:

• For the first question: In seed - plant ovules, meiosis and unequal cytoplasmic division occur. The megasporocyte (a diploid cell in the ovule) undergoes meiosis. After meiosis, there are four cells. Due to unequal cytoplasmic division, three of them disintegrate and one large megaspore remains. Pollen sacs are related to male gametophyte development (producing microspores which develop into pollen grains). Gametophytes are the haploid stages (male and female). Microspores are produced in pollen sacs and develop into male gametophytes (pollen grains).
• For the second question: Zygomycota members are often molds. They have a mycelium (mass of hyphae) that grows on or through organic matter. Chytridiomycota are mainly aquatic fungi with motile spores (zoospores), and their body forms are less likely to be described as a mass of hyphae growing on organic matter in the typical sense compared to Zygomycota.

Answer:

1. ovules
2. Zygomycota