Which of the following is the marine organism credited with being the transition organism between the aquatic arthropods and the land dwellers?

a) scorpion
b) centipede
c) dragonfly
d) horseshoe crab
e) blue crab


Answer: d) horseshoe crab

Biology & Microbiology

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At an autosomal gene locus in humans, the allele for brown eyes is dominant over the allele for blue eyes. At another gene locus, located on the X chromosome, a recessive allele produces colorblindness while the dominant allele produces normal color vision. A heterozygous brown-eyed woman who is a carrier of colorblindness has children with a blue-eyed man who is not colorblind. What is the probability that their first child will be a blue-eyed female who has normal color vision? (Enter the probability as a percent. Enter the number only without the percent sign. For example, enter 100% as 100 and enter 12.5% as 12.5)  

What will be an ideal response? 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 and autosomal inheritance?   Consider Possibilities · What other information is related to the question? Which information is most useful? 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

At the tip of each branch, the ____________ cover(s) the shoot apical meristem

A. bundle sheath B. leaf primordia C. flower bud D. node E. internode

Biology & Microbiology

In addition to antimicrobials, patients with diphtheria are treated with ________.

A. heart medication B. bronchoscopy C. antitoxin D. tracheostomy E. All of the choices are correct.

Biology & Microbiology

Which of the following are NOT components

of the appendicular skeleton? a. arm bones b. collarbones c. finger bones d. ribs e. leg bones

Biology & Microbiology