Reading...
Play button
Play button
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;
20 Cards in this Set
- Front
- Back
|
why do leaves change color in the fall?
|
-there is not enough light or water for photosynthesis.
-trees shut down their food-making factories -The green chlorophyll disappears from the leaves. |
|
|
what turns leaves like the maple leaf red?
|
-glucose is trapped in the leaves after photosynthesis stops
-Sunlight and the cool nights of autumn cause the leaves turn this glucose into a red color. |
|
|
what turns leaves like oak leaves brown
|
Sunlight and the cool nights of autumn cause the leaves turn this glucose into a brown color.
|
|
|
characterstics of the plant kingdom
|
-Eukaryotic cell (has nucleus)
-cell wall contains cellulose. -Carries out photosynthesis using chlorophyll a and b |
|
|
examples of plants (some are tricky)
|
Moss
Ferns Trees Grass Now, green algae |
|
|
plants require:
|
Sunlight
Gas Exchange Water and Minerals |
|
|
why do plants require the sun?
|
-it is necessary for photosynthesis
-leaves have actually evolved and adapted to maximize light absorption. |
|
|
why do plants require gas exchange
|
Plants require oxygen and carbon dioxide
-Oxygen to support cellular respiration -Carbon dioxide to carry out photosynthesis |
|
|
why do plants require water and minerals?
|
-plants have evolved to maximize their water uptake and minimize water loss.
-Minerals get taken up in the absorption of water by the roots |
|
|
where did life originate?
|
Life originated in the oceans, lakes and streams.
|
|
|
what was the first photosynthetic organism?
|
was bacteria (prokaryotes). no nucleus
|
|
|
early plants looked like what modern organism?
|
green algae.
|
|
|
why did green algae recently become part of the PLANT kingdom?
|
1) they have the same cell wall
2) photosynthetic pigments are the same and 3) they have the same basic reproductive cycle |
|
|
when did spores exist?
|
Spore fossils appear 475 million years ago
|
|
|
how old is the oldest plant fossil?
|
Oldest plant fossil appears 50 million years ago
|
|
|
what did early plants need in terms of nutrients and their environments
|
-They were very small
-grew in damp ground (swamp) -needed H2O to complete their life cycle. |
|
|
what kinds of plants were able to make the transition from swamps to dry land?
|
-plants that were more resistant to drying conditions like those of Sun rays
-more capable of conserving H2O -capable of reproduction without water. |
|
|
The evolution of plants looks something like this:
|
Green Algae gives rise to..
Mosses, which give rise to.. Ferns, which give rise to.. Cone-bearing plants, which give rise to.. Flowering plants… sentence to remember: "Get my father's car fast!" GMFCF |
|
|
4 major features of a plant
|
Embryo formation
Specialized water conducting tissue Seeds Flowers |
|
|
Plants are special because they do what is called alternation of generations =
|
the plants alternate between haploid (N) and diploid (2N).
|
