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What is the key limiting factor on cell size? correct answers The size of a cell is limited by the ratio of its surface area to volume. A cell will only remain stable if... correct answers ...the surface area of the plasma membrane maintains a balance with the volume of the cytoplasm. The salivary gland... correct answers ...secretes saliva which enters the digestive tract and aids the digestive process. Gregor Medel correct answers Studied the relationships between traits expressed in parents and offspring and the genes that caused the traits to be expressed. In order to become an established part of an island ecosystem there must be... correct answers ...a populations large enough to ensure successful reproduction, a food source, a suitable habitat, and a source of moisture. Lymphocytes correct answers Are cells involved in immunity and are produced in bone marrow as stem cells. B Cells correct answers Produce antibodies into the bloodstream that find and attach themselves to foreign antigens (toxins, bacteria). T Cells correct answers Some patrol the blood for antigens, but are also equipped to destroy antigens. They may regulate immune responses as well. Mass extinctions promote diversification... correct answers ...because ecological niches open up, making conditions favorable for the establishment of new, diverse species. Common elements found in proteins are correct answers Carbon, Hydrogen, Oxygen, and Nitrogen What phylum are snakes in? correct answers Chordata Cellular Respiration correct answers Is the process that releases energy for use by the cell. A hydrogen bond correct answers Is weaker than ionic, covalent, disulfide, or double bonds. A hydrogen bond involves correct answers the attraction of atoms of different polarity and can be easily broken. Ionic bonds involve correct answers the transfer of electrons. Covalent bonds correct answers share electrons.