Guard cells open stomata when they engorge with water

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Guard cells open stomata when they engorge with water and bow outward.True False
Plants perform only photosynthesis, not cellular respiration.
What product that is required by plants do animals–as well as plants–produce during cellular respiration?
What product(s) do plants produce during photosynthesis that is/are used by humans and other animals?
There are more species in the insect group of phylum Arthropoda than all other animal phyla combined.True False
Sponges were the earliest animals to evolve true tissues.
The overwhelming majority of animals are:
A marine animal with tube feet and radial symmetry is certainly an echinoderm.
Which group is most closely related to the echinoderms?Chordates Arthropods Nematodes Molluscs Annelids
There is far more animal diversity in the ocean than on land in part because animals first evolved in the ocean.
Whereas all animals are multicellular, some are nevertheless microscopic.
Copulation is necessary for all animals using internal fertilization.
Blood stays within vessels in a closed circulatory system.True False
As a general, common feature, what characteristic do flatworms (Platyhelminthes) have in common with some of the more advanced animal phyla?
Cnidarians such as jellyfish have muscle and nervous tissues.
Molting is necessary for:
Structures of the skeletal system include all of the following except:ligaments. bone. nails. cartilage. Subcutaneous fat tissue in humans is located mainly in the dermis.
True False
Which of the following is part of the axial skeleton?
In humans, the heart and lungs are found in the:

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