Which was present first?
a. mitochondria
b. aerobic respiration
c. chloroplasts
d. fungi
e. photosynthesis
e
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Two genes within an organism that arose from the duplication of a single gene in an ancestor are ________________.
Fill in the blank(s) with the appropriate word(s).
Reductive dehalogenation involves the removal of halogens, like chlorine or fluorine, while adding electrons at the same time.
Answer the following statement true (T) or false (F)
The place that an organism resides is
a. its community. b. its habitat. c. its population. d. all of the above.
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