The ____ phylum has only about 70 living species of vascular, seed-bearing plants in three genera, including
Welwitschia and Ephedra. Some species have a two-step fertilization process, similar to fertilization in angiosperms.
a. Cycadophyta
b. Anthophyta
c. Gnetophyta
d. Coniferophyta
e. Ginkgophyta
ANSWER: c
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Genetic differences among species and within a species can convey genetic immunity to certain diseases.
Answer the following statement true (T) or false (F)
Three of the four answers listed below are parts of a common molecule. Select the exception
a. phosphate group b. adenine c. deoxyribose d. ribose
Which of the following is the most accurate statement about the relationship between gene duplication and mobile genetic elements?
A) The most common way that genes are duplicated is by the activity of mobile genetic elements. B) A duplicated gene is an example of one kind of mobile genetic element. C) Mobile genetic elements can cause gene duplication, but most gene duplication events are caused by other mechanisms. D) Gene duplication is one kind of genomic defense against the spread of mobile genetic elements.
Zacchias has been in a horrible fire, and 50% of the total surface of his skin has been destroyed. Given the information in this chapter, why is it so important to replace the burned skin, and what is his best specific option for replacement?
What will be an ideal response?