archaeplastida

Question 1

this group includes…and organism type

Answer 1

red and green algae, both (uni and multi)

Question 2

closest relatives of…

Answer 2

land plants

Question 3

archaeplastida- red algae

Answer 3

red due to presence of phycoerythrin
no flagellate structures in life cycle (3/4 has)

ex: nori aka sushi wrap

Question 4

archaeplastida- green algae
cell wall, vacuole, pyrenoids

Answer 4

cell wall
-cellulose and some carbohydrates, proteins
-rigid when mature
-permeable to water, gasses, minerals

vacuole
-regulate when water content of cell
-water moving exerts outward pressure (tugor pressure= keeps cells from dehydration)

pyrenoids (only in algae)
-within chloroplast
-site of starch synthesis

Question 5

life cycle of green algae chlamydomonas

Answer 5

isogamy comes together, diploid stage (zygote form), when conditions are right they undergo meiosis, 4 cells emerge (can be +/-), mature cells turn to gamete and cycle starts again

can also have asexual cycle where gametes undergo meiosis and are just zygote (no +/-)

Question 6

benefits of sexual vs asexual reproductiom

Answer 6

1. shuffle of genes favouring unstable environments
2. opp