Immediately inside the epidermis of a eudicot stem is the pith. Indicate whether the statement is true or false


False - cortex

Biology & Microbiology

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In 1910, Morgan did a series of experiments with the fruit fly Drosophila, an organism where females are XX and males are XY. When a mutant male fly with white eyes was crossed with a wild type female with red eyes, none of the F1 progeny had white eyes but 18% of the F2 progeny had white eyes. Unexpectedly, all of these white-eyed F2 flies were males. Based on these results, Morgan concluded that white eyes is caused by a recessive X-linked allele. Suppose Morgan had found that half of the F1 progeny had white eyes but all of these white-eyed F1 flies were females. In this case, a valid hypothesis would be  

A.  White eyes is caused by a recessive Y-linked allele. B.  White eyes is caused by a dominant Y-linked allele. C.  White eyes is caused by a dominant X-linked allele. D.  White eyes is caused by a dominant autosomal allele. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain?   Gather Content · What do you already know about X-linked inheritance?   Consider Possibilities · Consider the different answer options. Which can you rule out?   Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Biology & Microbiology

Its defoliant effects were first noticed when it leaked from gas lights; later found to be produced by plants themselves.  

Choose the letter of the best: A. abscisic acid B. auxin C. ethylene D. cytokinin E. gibberellin

Biology & Microbiology

Bacteria which move by means of gliding motility include

A) Cyanobacteria. B) Cytophaga. C) Clostridium. D) Spirillum. E) both Cyanobacteria and Cytophaga.

Biology & Microbiology

Several different classes of enzymes are needed for the catabolism of carbohydrates. Which of the following descriptions best matches the function of a dehydrogenase?

(a) An enzyme that catalyzes the rearrangement of bonds within a single molecule. (b) An enzyme that catalyzes a change in the position of a specific chemical group within a single molecule. (c) An enzyme that catalyzes the oxidation of a molecule by removing a hydride ion. (d) An enzyme that catalyzes the addition of phosphate groups to other molecules.

Biology & Microbiology