Which is not a greenhouse gas?
What will be an ideal response?
Nitrogen (N2)
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Iron deficiency is often indicated by yellowing in newly formed leaves. This suggests that iron is _____
A) a relatively immobile nutrient in plants B) tied up in formed chlorophyll molecules C) concentrated in the xylem of older leaves D) concentrated in the phloem of older leaves E) found in leghemoglobin and reduces the amount available to new plant parts
DNA replication is said to be semiconservative because
a. the number of nucleotides within genes remains constant. b. half of the DNA in a cell comes from one parent and the other half from the other parent. c. the same process of DNA replication is used by all organisms. d. the total amount of DNA within an individual remains the same. e. each new DNA molecule is composed of one old strand and one new strand.
Concerning the sex chromosomes, which of
the following is correct? a. The Y chromosome carries a greater number of genes for nonsexual traits than does the X. b. X and Y are different in size but carry nearly equal numbers of genes. c. The X chromosome carries more genes for nonsexual traits than does the Y. d. The X chromosome carries only genderrelated genes. e. The X chromosome carries the SRY gene
Jamie suffers from heartburn. Sometimes this can be treated with
A. thymosin. B. luteinizing hormone. C. prostaglandins. D. mineralocorticoids. E. aldosterone.