When an atom that has lost a valence electron is attracted to one that has gained a valence electron, the type of bond formed is a/an ___ bond
Fill in the blank(s) with the appropriate word(s).
Answer: covalent
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In land plants, ________ transports water and minerals from the soil, and ________ transports food created from photosynthesis.
a. xylem; phloem b. xylem; spores c. phloem; xylem d. phloem; gametes
Most organ transplants fail because
a. of poor vascular connection between host and donor tissue. b. the migrating leukocytes attack the tissue adjacent to the transplant. c. of the activity of cytotoxic T cells. d. introduced tissues produce antibodies that cause a massive reaction. e. of all of these.
One reason that water is able to form unbroken columns is because water molecules are cohesive
____________________ Indicate whether the statement is true or false.
The intimate, mutually beneficial association formed between a fungus and the root of a plant is called a
A) sporophyte. B) mycorrhiza. C) hypha. D) mycelium.