Intro to Plants
what is the dominant stage of moss reproduction
gametophyte stage
parenchyma, sclerenchyma, and collenchyma
what does the pollen grain produce two of?
two sperm
what does the gibberellin hormone do?
Cell elongation, cell division, seed growth
What is the perfect flower?
has both the stamens and pistils
How long do gnetophytes live?
1500-2000 Years
What does the stomata do?
opens and closes to take in carbon dioxide and release oxygen
After pollination the pollen grain goes into what ovule?
the pollen tube
What is an example of a tropic response? And describe what it does
gravitropism - growth in response to gravity
thigmotropism - growth in response to mechanical stimuli
What is it called when the embryo and seed start to grow?
Seed Germination
How many different species of moss are there?
12,000 Species
what are the two features that plant cells are identifiable by?
Cell Walls and Large Central Vacuoles
Eggs are reproduced in the female structure called the what?
archegonium
How do plant hormones affect other parts of the plant?
it can affect cell division, growth, or cell differentiation
What are the male and female reproductive organs in flowering plants? (label each one)
Female - Pistil
Male - Stamens
how much of the plant kingdom does anthophyta make up?
75%
Where are the meristem tissues located?
what are all three pollination mechanisms?
cross pollination, animal pollination, and wind pollination
If a plant is a dwarf planet, what hormone is it missing?
Gibberellins
How does germination start?
by taking in water
What is the correct order of plant evolution? (use flowering plants, nonvascular plants, green algae, vascular plants, seedless vascular plants)
Green Algae, Nonvascular Plants, Seedless Vascular Plants, Vascular Plants, Flowering Plants
Phloem
Which plants are heterosporous?
Conifers
Heterosporous - produce two types of spores that develop into male and female groups
What is a nastic response?
response that causes movement independent of the direction of the stimulus (venus fly trap, opening and closing of leaves during the day/ when touched)
What type of photoperiodism do plants prefer to be exposed daily to a number of hours of darkness that is greater than its critical period?
Short-Day Plants