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Animal Diversity
Animal Diversity Again
Animals AGAIN
Plants 1
Plants 2
100
In this type of development, cleavage is spiral and determinate
What is protostome development
100
This event marks the earliest fossil appearance of many major groups of living animals
What is the Cambrian explosion
100
Animals lack cell walls and their bodies are held together by stuctural proteins called this.
What is collagen
100
An organism's role in its environment is called a ______
What is its niche
100
Parts of the xylem are tracheids and vessel elements, which are this.
What are water-conducting cells
200
Cnidarians have two variations of body plans. One is the sessile polyp and the other is _____.
What is the motile medusa
200
After a sperm fertilizes an egg, the zygote undergoes rapid cell division called ______.
What is cleavage
200
The four animal eras.
What are the Neoproterozoic, Paleozoic, Mesozoic, and Cenozoic Eras.
200
Stomatal opening at dawn is triggered by ______, ______, and ______
What are light, CO2 depletion, and an internal clock in guard cells
200
The older layers of secondary xylem that no longer conduct
What is heartwood
300
The central digestive compartment of a cnidarian is called the _______.
What is What is the gastrovascular cavity
300
This germ layer is the innermost germ layer and lines the developing digestive tube, called the archenteron
What is the endoderm
300
Lack true tissues
What are sponges
300
Turgor loss in plants causes ______, which can be reversed when the plant is watered.
What is wilting
300
Some plant organs grow only to a certain size. This is called:
What is determinate growth
400
This undergoes gastrulation
What is the blastula
400
Under the larval stage, the sexually immature larva undergoes this to grow into an adult.
What is metamorphosis?
400
The first mammals emerged during this era
What is Mesozoic
400
In charophytes, a layer of a durable polymer called _______ prevents exposed zygotes from drying out.
What is sporopollenin
400
The bark consists of this
What are all the tissues external to the vascular cambium
500
Sexually immature and morphologically distinct from the adult
What is larvae
500
Bilaterally symmetrical animals have these two types of side symmetry.
What is dorsal and ventral?
500
The germ layer covering the embryo's surface
What is the Ectoderm
500
The shedding of lower leaves that do not photosynthesize as much as they respire.
What is self-pruning
500
Companion cells assist these
What are sieve-tube elements