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gene A controls the sharpness of spines in a type of cactus. cactuses with the dominant allele, A, have sharp spines, whereas homozygous recessive aa cactuses have dull spines. at the same time, a second gene, N, determines whether cactuses have spines at all. Homozygous recessive nn cactuses have no spines at all.A) the relationship between genes A and N is an example of?B) a cactus with sharp spines is crossed with a spineless cactus. all of the offspring have spines but approximately half of the 100offspring have dull spines and half have sharp spines. what are the genotypes of the parent cacti?
Now that you have examined the unifying characteristics of annelids, list 3 or 4 characteristics they share with flatworms and nematodes as the close ancestors.
Draw a biomechanical force diagram for the flexor carpi radialis muscle. Label the fulcrum, bones used as levers, force application point, and the resistance. What kind of lever system does this represent?
The two biochemical pathways for coat color pigment in a species of triblles are shown below. The final color of the tribble is the combination of colors produced by the two pathways.
what is true for rift valleys? a. gravity is weaker over these areas. b. they result in upwelling convection currents. c. they split oceanic ridges d fresh partly melted rock rises in the middle and moves away from the valley e. all the abobe or f..
Explain how plants can regulate temperature and water. Give examples of at least 6 different adaptations and explain the role of each in temperature and/or water regulation.
Which of the following is not a type of viral reproduction?
Clarify the difference in their efforts to collect oxygen. Polychaetes have lateral, fleshy parapodia beset with numerous setae, and well developed head appendages such as jaws, tentacles and eyes. What function(s) do you think about parapodia serve.
A seven cm potato sliced is placed into an unknown solution. After the slice is immersed for one hour, the potato slice now measures six cm.
Think about the following genotypes, Yy Ss Tt, Determine how many different gamete combinations can be produced?
Provide two signs of SCID. Explain two options for expecting parents who have family members with SCID and are concerned their child will be affected with the immunodeficiency.
Name a type of bacteria (or a few) that produce large amounts of carbon dioxide (CO2) compared to most other bacteria when undergoing fermentation:
Which species exhibits the most parental care of young offspring?
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