Which of the following processes can move a solute against its concentration gradient?
A) osmosis
B) passive transport
C) facilitated diffusion
D) active transport
Answer: D
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A taxon that diverges earlier than the other taxa being considered in cladistic analysis is:
a. a homologous taxon. b. an outgroup. c. a derived taxon. d. an Amphioxus. e. a clade
Which of the following statements is true regarding the vascular cambia of ancient (extinct) lycophytes? Select all correct choices
A. Ancient lycophytes did not possess vascular cambia. B. Ancient lycophytes had vascular cambia that formed only secondary phloem. C. Ancient lycophytes had vascular cambia that formed only secondary xylem. D. Ancient lycophytes had vascular cambia that formed both secondary xylem and secondary phloem.
There are three alleles controlling the ABO blood types. IA and IB are codominant genes so that the combination IAIB
produces the AB blood type. The third allele, i, is recessive to the other two alleles. Indicate which of these parents could produce the given child:Parents Child Yes or No
(a) A ´ AB B (b) A ´ O A (c) A ´ B O (d) A ´ AB O (e) A ´ AB B (f) B ´ B O (g) AB ´ AB A
Photorespiration is a wasteful process that could be largely avoided if rubisco would bind only CO2
__________________ Indicate whether the statement is true or false.