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Which class of higher vertebrate animals possesses the following traits: endothermic animals with hair and mammary glands?

What structure in a vascular plant transports water?

Which group of invertebrates was the first group to have a circulatory system that is open instead of closed?

The oceanic zone that is the largest part of the biosphere and is where no photosynthesis occurs due to a lack of light reaching those ocean depths is called the _______________ zone.

Vascular tissue consists of ______.

Cycads, gingkos, and gnetophytes are examples of which major type of plant?

_________ is the scientific study of the interactions of organisms with their environments, in which organisms affect their environment and the environment affects the organisms within it.

Which type of mammal below has a placenta that the baby develops fully in before being born?

The Texas State [BLANK-1] is the largest single component of tax revenue. It generates about a quarter of the state’s total income.

The __________ of Texas creates public policy through executive orders.