Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
34 Cards in this Set
- Front
- Back
|
what are the four sustainable agriculture movements? |
soil conservation, better irrigation, better fertilizers, and prevent erosion |
|
|
why are commercially produced fertilizers bad |
contain mined or industrially processed minerals and easily leaches from soil and contribute to runoff and water pollution |
|
|
how do roots absorb water and minerals |
across epidermal surface area which is increased by root hairs and symbiotic relationships with fungi |
|
|
how do roots control water uptake |
by casparian strip within endodermis |
|
|
the cohesion tension theory |
regulates water loss by stomatal control; evaporation pulls water up |
|
|
pressure flow theory |
positive pressure by osmosis |
|
|
what are sinks |
sites of utilization |
|
|
what happens during fruit production |
vegetative growth slows greatly |
|
|
what are the two major groups of animals? |
invertebrates and vertebrates |
|
|
vertebrates do not have |
a backbone |
|
|
vertebrates possess? |
a backbone and most have a skull |
|
|
what does a skull allow for in vertebrates? |
complex movements |
|
|
what internal skeleton make up do vertebrates have? |
bone or cartilage |
|
|
how many species approx. of invertebrates |
about 1,950,0000/2 million |
|
|
how many species of vertebrates |
50,000/2 million |
|
|
what three characteristics define an animal |
eukaryotic, multicellular, ingestive heterotroph |
|
|
what are four common characteristics of animals |
cells lack cell walls, reproduce sexually (sometimes asexually), embryos similar developmental stages, most are actively mobile |
|
|
two types of body symmetry |
radial and bilateral |
|
|
radial symmetry |
body parts arranged around a central axis |
|
|
bilateral symmetry |
only one plan possible for mirror image |
|
|
what kind of symmetry do humans have |
bilateral |
|
|
bilateral symmetry favors? |
cephalization |
|
|
cephalization is |
centralized nerves in head region |
|
|
what are the three embryonic tissue (germ) layers |
ectoderm, endoderm and mesoderm |
|
|
ectoderm? |
skin and nervous system |
|
|
endoderm? |
produces GI tract |
|
|
mesoderM? |
muscle, skeleton and most organs |
|
|
two types of gut? |
incomplete and complete |
|
|
complete gut? |
tube with two openings |
|
|
incomplete gut? |
sac with 1 opening |
|
|
two types of complete gut? |
protostomes and deuterostomes |
|
|
where do the complete guts form in? |
embryonic ball |
|
|
protostomes? |
1st opening becomes the mouth, 2nd the anus |
|
|
deuterostomes |
1st opening becomes the anus, 2nd the mouth |
