Eukaryotic Characteristics and Classifications

Question 1

What type eukaryotic cells are unicellular?

Answer 1

Protozoa

Question 2

What is the feeding/growing form of a protozoa called?

Answer 2

Trophozite

Question 3

What is the reproductive term called when there is multiple fission or 1 protozoa goes to 20 protozoa

Answer 3

Schizogony

Question 4

This is the state that protozoa can take when there is adverse conditions. It is HIGHLY infectious

Answer 4

CYST

Question 5

What are some characteristics of protozoa?

Answer 5

• need lots of water
• have protective pellicle
  -ciliates move food into their cytosome
  -amebae phagocytize food

Question 6

Describe the asexual part of the life cycle of Malaria (starting with a infected mosquito biting a human)

Answer 6

1. Infected mosquito bites human, the sporozoites travel to the liver
2. Sporozoites produce merezoites via schizogony
3. Merezoites infected the RBCs
4. Ring stage occurs in the RBCs, merezoites are made
5. RBCs rupture, merezoites > infect new RBCs, some develop into gametocytes throughout the blood.

Question 7

Describe the sexual part of the life cycle of Malaria (starting with the mosquito biting infected human)

Answer 7

1. Mosquito ingests gametocytes
2. Gametocytes form to make a zygote in the mosquito
3. The sporozoites from the zygote travel to the mosquito’s salivary gland to infect new host.

Question 8

What kind of hosts are the mosquito and the human in the malaria life cycle?

Answer 8

Mosquito –> definitive
Human –> intermediate

Question 9

What is the difference between the definitive and intermediate hosts?

Answer 9

The sexual reproduction that takes place.
-asexual> intermediate
sexual > definitive

Question 10

What are helminths?

Answer 10

Parasitic worms
-Platyhelminthes (flat worms)
-Nematoda (roundworms)

Question 11

What are the characteristics of helminths?

Answer 11

1. multicellular
2. need host
3. reduced systems, complex reproduction
   - dioecious > male vs female
   - monoecious > female and male

Question 12

What is the life cycle of the tapeworm?

Answer 12

1. Eggs are placed in the environment
2. Cattle ingest the eggs
3. Develops in cattle
4. Humans ingest raw or undercooked infected cattle
5. Attaches to intestine and grows.

Question 13

What are the characteristics of fungi?

Answer 13

1. multicellular
2. hyphae > mycelium > thallus

Question 14

What are some fungal reproductive strategies?

Answer 14

1. Asexual:
   -mitosis, budding, fragmentation of hyphae, spores
2. Sexual stages:
   -plasmogamy (haploid + haploid join)
   -Karyogamy: nuclei fuse to make diploid zygote
   -Meiosis: diploid produces haploid