placozoa

Question 1

size of placozoa

Answer 1

1-3 mm

Question 2

placo meaning

Answer 2

flat

Question 3

how many species known?

Answer 3

abt 100

Question 4

genome size relative + specific

Answer 4

smallest genome
abt 98 mil bps

Question 5

what do they lack?

Answer 5

muscle
nerve
internal digestive cavity/gut

Question 6

shape

Answer 6

flat, no symmetry or body polarity

Question 7

eating process

Answer 7

glides over desired food, then humps up and forms a temporary digestive cavity with ventral epithelium in contact with the food

Question 8

cilia

Answer 8

hair-like substance on the epithelium

Question 9

what other kinds of animals have a single digestive opening?

Answer 9

platyhelminthes (flatworms)
ctenophora (comb jellies)
cnidaria (coral, jellyfish, sea anenomies)

Question 10

How many cell types in an individual?

Answer 10

4-6

Question 11

How do they move?

Answer 11

Cilia gliding

Question 12

Diet?

Answer 12

Microbial/algal films

Question 13

Fission

Answer 13

Asexual reproduction
Breaking into 2 pieces

Question 14

Fragmentation

Answer 14

Asexual reproduction
Breaking off into several fragments

Question 15

Sexual reproduction

Answer 15

Wild pops suggest high levels of it but it hasn’t been observed/understood