BIOLOGY FOR AP COURSES (OER)
17th Edition
ISBN: 9781947172401
Author: OpenStax
Publisher: OpenStax
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Textbook Question
Chapter 41, Problem 11RQ
Contractile vacuoles in microorganisms:
- exclusively perform an excretory function
- can perform many functions, one of which is excretion of
metabolic wastes - originate from the cell membrane
- both b and c
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Question #3:
In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would
transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming
there was just one gene conferring gametophytic obligate apomixis, and that the two parents are
inbreds, what would be the consequences of such a cross if:
a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the parental cross.
b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the…
Question #5:
Assume that two genes are identified that confer gametophytic facultative apomixis in soybean. The
genes show independent assortment. Recessive alleles at both loci are required for the facultative
apomixis. Facultative apomixis is triggered when the temperature at pollination is above 20 degrees C.
At temperatures below 20 degrees C, all reproduction is sexual, independent of genotype.
A facultative apomict male, capable of producing viable pollen, was crossed with a sexually
reproducing female. Assuming the parents are completely inbred, what are the predicted phenotypic
ratios (apomict: non-apomict) for the F1, F2, and DH (F1-derived) generations at each of the following
temperatures*:
a) 15°C?
b) 25°C?
*for full credit, show crosses and genotypes where appropriate. Remember to position the
female first (left side) in the cross.
Type your answer here:
Chapter 41 Solutions
BIOLOGY FOR AP COURSES (OER)
Ch. 41 - Figure 41.5 Which of the following statements...Ch. 41 - Figure 41.6 Which of the following statements...Ch. 41 - Figure 41.8 Loop diuretics are drugs sometimes...Ch. 41 - When a dehydrated human patient needs to be given...Ch. 41 - The sodium ion is at the highest concentration in:...Ch. 41 - Cells in a hypertonic solution tend to: shrink due...Ch. 41 - The macula densa is/are: present in the renal...Ch. 41 - The osmolarity of body fluids is maintained at...Ch. 41 - The gland located at the top of the kidney is the...Ch. 41 - Active transport of K+ in Malpighian tubules...
Ch. 41 - Contractile vacuoles in microorganisms:...Ch. 41 - Flame cells are primitive excretory organs found...Ch. 41 - BUN is. blood urea nitrogen blood uric acid...Ch. 41 - Human beings accumulate ____before____ excreting...Ch. 41 - Renin is made by. granular cells of the...Ch. 41 - Patients with Addison's disease retain water...Ch. 41 - Which hormone elicits the 'fight or flight”...Ch. 41 - Why is excretion important in order to achieve...Ch. 41 - Why do electrolyte ions move across membranes by...Ch. 41 - Why are the loop of Henle and vasa recta important...Ch. 41 - Describe the structure of the kidney.Ch. 41 - Why might specialized organs have evolved for...Ch. 41 - Explain two different excretory systems other than...Ch. 41 - In terms of evolution, why might the urea cycle...Ch. 41 - Compare and contrast the formation of urea and...Ch. 41 - Describe how hormones regulate blood pressure,...Ch. 41 - How does the renin-angiotensin-aldosterone...
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Excretory System; Author: Amoeba Sisters;https://www.youtube.com/watch?v=q5qaGHfdmYM;License: Standard youtube license