Science test Flashcards
The CWB larva constantly molts ?
The latonrva grows too large for its exoskeleton, so it breaks out of the exoskeleton, revealing a baggy inner skin
Frass
Larva droppings are called frass. Final insect larva of a moth.
How many “instars” or stages of development does the CWB have?
5 instars
What are the most important clues for insects to look for when determining what to eat
Odor and taste
What are some characteristics of plants in the Brassicaceae, or mustard, family?
A sharp, strong odor caused by mustard oils and chemicals called glucosides.
What is the “plant’s chemical defense mechanism”? Is it effective?
Glucosides are chemicals that are supposed to make the plant seem unappetizing. It doesn’t work that well because there are a whole group of insects that are actually attracted to the glucosides.
Why will the droppings from the CWB be the same color as the mixture they eat?
Butterflies cannot break down the food coloring, so their droppings will be the same color as what they ate.
What does metamorphosis mean?
To transform or change
Why are the larvae light green?
For camouflage on leaves
What do adult CWB feed on? Why don’t they ever grow larger?
They feed on nectar which is a mixture of sugar, water and minerals. They use the sugar as energy - they do not store any extra energy or grow any bigger.
How do male butterflies find their mate?
Females release a special chemical (pheromone) that attracts the males.
If a female lays up to 300 eggs, then why don’t we have butterflies everywhere?
Many eggs will not hatch, some larva will be eaten or die, and they have a short lifespan
What happens to chrysalises in the fall? Why?
Chrysalises enter diapause, a dormant state, for the fall and winter. This is to ensure the adult butterfly that emerges will survive.
How does an animal’s diet influence their “niche,” or position, in an ecosystem
What an organism eats determines where it can live.
How were gypsy moths first introduced to the U.S?
By accident. A scientist was studying them and a few escaped.
What was done to try to control the gypsy moth population in the U.S? What was the result? What lesson was learned from this?
A fly that ate gypsy moth larva was is brought to the U.S. The fly did eat some gypsy moths but also fed on a rare moth that is now endangered. The lesson learned is that extensive research must be done on an organism before introducing it to a new ecosystem.
4 types of “Crucifers”
Cabbage, brussel sprouts, cauliflower and WFP
Why was the fast plants experiment conducted on a space station
It was the first time plants had been grown in microgravity, do it proved that it was possible to grow food in space so the astronauts can have fresh produce.
What are macronutrients and how do they benefit the growth of plants?
Essential nutrients that plants need in larger amounts
How much of each macronutrients is in this Turf Fertilizer?
Nitrogen (N): 16
Phosphorus (P): 0
Potassium(K): 8
What are Micronutrients?
10 nutrients needed in smaller amounts
Root monocots
Usually comprised of small branching fibers
Root dicots
Usually have one central root with secondary roots growing from it
Stem monocots
Bundles of veins scattered throughout the stem
Stem dicots
Bundles of veins are arranged in a neat circle around the stem
What is a seed?
An embryo (the tiny beginnings of a plant- stem, roots, leaves) contains stored food and a protective outer coat
What is a cotyledon?
A seed leaf
Germination
The process of a seed becoming a plant by sprouting its’roots. This takes place underground.
