When an organism hunts, kills, and feeds on another organism, this is an example of an organism that is a ____.

If the population of a predator decreases in a population due to hunting or some other factor, what would happen to the population of its prey?

Energy pyramids show the amount of energy in each trophic level of an ecosystem. What is always at the base of these pyramids?

How are parasites different than predators? (Select all that apply.)

Why are plants important to humans?

What is the purpose of the fruit?

Why is seed dispersal important for angiosperm plant reproduction?

Which of the following has changed some traditional classification systems?

A scientific name, such as Canus lupus has two names. The two parts of the names are which of the following classifications:

The major concept of evolution is that

The absence of a central point or axis around which an animal's body parts are equally distributed is called

The cephalization of an organism is the formation of a ____

Choose all of the following that describe or are an example of asexual reproduction.

Choose all of the following that describe or are an example of sexual reproduction.

When an organism has both male and female reproductive parts simultaneously, this is called...

Which of the following is true of genetic diversity?

The green area in the diagram represents (select all that apply)

Organisms that are oviparous are which of the following? (Select all that apply)

Organisms that are ovoviviparous are which of the following? (Selct all that apply)

Organisms that are viviparous are which of the following? (Selct all that apply)

In embryonic development, when the mouth develops before the anus it is called (this describes most invertebrates except for echinoderms)

There are three embryonic germ layers (ectoderm, endoderm, and mesoderm) in some organisms. These organisms have an organ system of development, and are classified based on the presence of a coelom. Which of the following terms describes these organisms?

Which of the following is not found in sponges?

The opening at the top of the cavity (spongocoel) in the sponge is called

Cnidarians exchange respiratory gases and nitrogenous wastes via

Sponges have ecological impact on the environment and are used by humans in multiple ways. Select all that apply here:

Cnidarians have stinging cells called

Which of the following describes the circulatory system of annelids?

Each of the worm phyla have an additional germ layer that cnidarians did not have. Which of the following is the term to describe that extra layer?

If your little toddler brother seems to be scratching their rear end a lot, it's possible that they have which of the following common human parasites?

Which of the following is a model organism commonly used in research labs?

Choose all of the following which are the main body regions of mollusks.

Which of the following secretes the shell of the mollusk?

Mollusks mostly have a _______ circulatory system.

Many mollusks have a rasping structure that can scrape algae from rocks, etc. called a...

Regions/segments of the body having specific specialization is called

The shedding of the exoskeleton of an arthropod to allow for growth is called

This process reduces competition between larval and adult stages of arthropod species.

Excretion is necessary for the removal of what in the body?

Select all that apply: Contributions to the evolutionary success of arthropods.

Adult sea stars have which of the following types of symmetry?

Echinodermata means

Echinoderms and chordates are more similar to eachother than to other invertebrates because they are both

Echinoderms' skeletons are

Choose all that apply: Water vascular system of echinoderms is involved with...

Which of the following phyla is described here: diploblastic with tissue level of organization; radial symmetry; cnidocytes; jellyfish, hydra, have nematocysts

Which of the following phyla is described here: triploblastic coelomates with bilateral symmetry; endoskeleton in most; notochord, dorsal nerve cord, pharyngeal gill slits, post-anal tale, amphibians are an example

Which of the following phyla is described here: triplobasts with modified coelom called water vascular system; spiny skin, radial symmetry, endoskeleton, tube feet, close relative to chordates, sea stars and sand dollars are examples

Which of the following phyla is described here: triploblastic coelomates; jointed appendages, bilateral symmetry, exoskeletons, crustaceans, arachnids and insects are examples

Which of the following phyla is described here: triploblastic pseudocoelomates without segmentation; bilaterally symmetrical and tapered; some of the most abundant animals on Earth; roundworms, some parasitic such as pinworms, hookworms, and filarial worms; do not have circular muscles/only longitudinal

Which of the following phyla is described here: triploblastic coelomates with bilateral symmetry, paired setae, and metamerism; segmented worms, earthworm, polychaetes, & leeches are examples

Which of the following phyla is described here: sessile, asymmetrical with no tissues or organs; asymmetrical, have choanocytes for filter feeding, sponges

Which of the following phyla is described here: triploblastic acoelomates with bilateral symmetry and flame cells; somewhat cephalized; incomplete gut; flatworms, free-living planaria and parasitic worms such as tapeworms & flukes are examples

Which of the following phyla is described here: triploblastic coelomates with bilateral symmetry; soft-bodied, cephalized, some with very well-developed nervous systems;  muscular foot and shells in some groups, examples are snails, squid, clams, octopuses