Section 6B Flashcards
Mangroves
intertidal salt tolerant tree or shrub if tropical coastlines; black and red
Mangal
forest of mangroves
Arial Root
root that occurs above the ground
Stilt Root
aerial roots that hold up mangroves
Prop Root
stilt root that arises from the trunk
Drop Root
stilt root that arises from a branch
Lenticels
scar like openings on the surface of the roots that supply oxygen to the root system
Anchor Roots
short branches from the main root that hold the tree in the sediment
Nutritive Roots
the finest divisions of roots for absorption of minerals
Cable Roots
subterranean horizontal part of a root system that extends from the trunk
Pneumatophores
aeriel roots that grow out of the sediment from a cable root and provide air to the root
Stomata
is a pore found in the epidermis of leaves, stems, and other organs, that controls the rate of gas exchange
Propagule
dispersal stage of mangrove
Hypocotyl
initial stem of young plant
4 Characteristics of Animals
- multicellular
- eukaryotic & lack cell walls
- cannot produce their own food
- can actively move (at some point in their life history)
Invertebrates
animal that lacks a backbone
Vertebrates
animals that have a backbone
Sponges (Phylum Porifera)
simple asymmetrical sessile animals
Sessile
permanently attached to a solid surface
Ostia
holes in a body of sponges through which water enters
Spongocoel
cavity in the body of a sponge
Osculum
opening through which sponge expels water
Tissue
group of specialized sells that function together as a unit
Collar Cells (Choanocytes)
flagellate cells in a sponge that circulates water and traps food
Pinacocytes
cells that make up the outer covering of a sponge and like the internal chambers not lines by choanocytes
Archaocytes
cells that form any of the cells types in a sponges body
Spicules
structures that support a sponges body; made of CaCO3, silica, or spongin
Spongin
a protein that makes up flexible spicules
Sponge Body Forms
size limited by ability to circulate water and body form
Asconoid
type of sponge body that lacks invagination; simple, tubular, small, found in clusters
Syconoid
type of sponge body with single spongocoel many invagination; pockets lines with choanocytes
Leuconoid
type of sponge with multiple spongocoels and chambers leading to them; chambers lined with choanocytes, most complex/largest sponges
Suspension Feeder
organism that feeds on food suspended in the water (20% of feeding via phagocytosis)
Filter Feeders
filters plankton or nutrients suspended in water
Budding
type of sexual reproduction in which a group of cells on the surface of the parent develop into a new individual
Hermaphrodites
animals that can produce both male and female gametes
Sperm- drones from modified choanocytes
Eggs- usually develop from archaeocytes
Photoperiod
relative amount of light and darkness in a 24 hour period
Sponge Competition
compete with corals and bryozoans; make chemicals that kill corals
Sponge Predators
silica spicules inhibit grazing; fed on by a few fish and molluscs and hawksbill sea turtles
Sponge Symbiosis
symbiotic bacteria, cyanobacteria, shrimp, and fishes
Cnidarian
animal that belongs to phylum Cnidaria
Cnidocyte
stinging cell found in all cnidarians
Radial Symmetry
organization of body parts around a central axis
Polyp
generally benthic form of cnidarian characterized by a cylindrical body with an opening at one end, usually surrounded by tentacles