BSC 1011 Lecture Notes - Lecture 2: Sporangium, Ascus, Sporophyte

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nicoleh

1 Dec 2021

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Zygotic - zygote (diploid structure formed during syngamy) engages in meiosis, producing genetically. What are the 3 meiotic types? unique spores: zygomycete fungus, gametic - diploid organism produces haploid gametes via meiosis, sporic - diploid organism produces haploid spores via meiosis, most animals, most plants. When fungi makes contact with organic matter, they make enzymes (exoenzymes) Haustoria : modified hyphae that releases exoenzymes for extracellular digestion. It also reduces the chromosome numbers of pairs to unpairing. In order for a cell to engage in meiosis, it must be a diploid b) Most fungal hyphae are hidden deep into the ground, so they create a fruiting body that grows out of the ground, releasing spores ( dikaryon stage ) Asexual reproduction : nonmobile spores form in a sporangia. Mating types (+ & -) mate by a gametangia. In the dikaryotic stage, zygosporangium (n+n) is produced via mitosis that will go through karyogamy.

Related Questions

1. Which of the following is NOT true of mycorrhizae?

A) This groupâs name means âfungus rootsâ

B) Plant roots provide mutualistic mycorrhizae with organic nutrients

C) Mycorrhizal fungi may form a mutualistic symbiosis with plants

D) Mycorrhizal fungi provide plants with organic nutrients absorbed from the soil

2. Which of the following terms is INCORRECTLY defined or identified?

A) saprobic fungi-eukaryotic heterotrophs which absorb their nutrients from living organisms

B) plasmogamy-the union of the cytoplasms of two parent mycelia

C) dikaryon-the stage in fungal sexual reproduction in which hyphae contain pairs of haploid nuclei of opposing mating types

D) zygosporangia-the environmentally resistant dikaryotic stage of the Zygomycota

3. In the Kingdom Fungi,

A) a mycelium is a body formed of a network of hyphae

B) a haploid multicellular form alternates with a diploid multicellular form

C) coenocytic hyphae have multiple cross-walls with large pores

D) cell walls are reinforced with proteins similar to collagen

4. Which of the following groups is INCORRECTLY matched with a structure for asexual reproduction?

A) Zygomycota-sporangium(sporangia)

B) Yeast-budding off of new yeast cells

C) Basidiomycota-basidium(basidia)

5. Select the TRUE statement about animal development:

A) Deuterostome development is indeterminate

B) Mesoderm in protostomes arises as outpocketings of the primitive gut

C) In deuterostomes, the blastopore ultimately becomes the mouth of the adult

D) Radial cleavage is characteristic of protostome development

E) All of the above are true

azurecricket62

Which of the following statements is true?

Question 7 options:

	In plants, gametes are produced by meiosis
	In animals, gametes are produced by mitosis
	Plants have both a multicellular diploid stage and a multicellular haploid stage
	Most fungi have a life cycle that includes a multicellular diploid stage.
	Most animals have a sexual life cycle that includes a multicellular haploid stage.

skyhamster121

1.A mycologist visits your biology class and discusses herresearch on a particular fungus that lives on the bark of damagedspruce trees. She explains that the fungal hyphae of her researchorganism is heterokaryotic. You raise your hand and request thatshe define that word. Her correct response is

heterokaryotic means that thenuclei of the fungal hyphae are genetically the same.

heterokaryotic means that eachcompartment of the hyphae contain two distinct nuclei.

heterokaryotic means that thenuclei of each compartment of the hyphae are geneticallydistinct.

heterokaryotic means that each compartment of the hyphaecontains only one nucleus.

2. Select the true statements concerning reproduction ofbasidiomycetes. (Check all that apply.)

The adult forms of a typicalbasidiomycete consists of a mass of dikaryotic primarymycelia.

The secondary mycelia fuse to formprimary mycelia. The primary mycelia form the fruiting body.

The gills of an Amanitamushroom contains basidiospores.

Karyogamy produces a diploid zygotethat undergoes meiosis.

Meiosis produces basidiospores, and the fusion of spores fromdifferent mating strains produces the primary mycelium.

3. In the life cycle of a zygomycete, after the zygospore isformed, the next event will be

dikaryon formation.