An embryo sporophyte surrounded by nutritive tissue and a tough, protective outer coating makes up a(n) ____
a. pollen grain
b. spore
c. ovule
d. seed
e. strobilus
ANSWER: d
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Exchange of materials between blood and tissues depends upon ____
a. high capillary blood pressure b. high capillary resistance c. lack of capillary pores d. slow capillary blood flow e. active transport processes
Assume that a cross is made between a heterozygous tall pea plant and a homozygous short pea plant
Fifty offspring are produced in the following frequency: 30 = tall 20 = short (a) What frequency of tall and short plants is expected? (b) To test the goodness of fit between the observed and expected values, provide the needed statement of the null hypothesis. (c) Compute a Chi-square value associated with the appropriate test of significance. (d) How many degrees of freedom are associated with this test of significance?
A person who cannot make enough of the plasma protein ________ might have problems with water balance
Fill in the blank(s) with correct word
Diabetes mellitus results from a disorder of glucose uptake by systemic cells and can result in a number of symptoms including high levels of blood glucose and the presence of glucose in the urine. Which of the following is a reasonable explanation for the presence of glucose in the urine?
A. A lack of sodium in the filtrate blocks the function of the Na+/glucose symport protein. B. High levels of glucose interfere with ADH function. C. The reabsorption capacity of the kidney for glucose is exceeded. D. The high levels of glucose induce a "dehydrated" state that promotes production of a large amount of dilute urine. E. None of the choices given are a logical explanation for this observation.