The form of native DNA, referring to its two adjacent polynucleotide strands interwound into a spiral shape

What will be an ideal response?


Double Helix

Biology & Microbiology

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Comparative genomics helps us to understand evolutionary relationships between organisms

Indicate whether the statement is true or false.

Biology & Microbiology

Which of the following prenatal tests can be

performed earliest in a pregnancy?

a. amniocentesis b. obstetric sonography c. fetoscopy d. chorionic villus sampling e. preimplantation genetic diagnosis

Biology & Microbiology

While touring the ancient Egypt exhibit at the local history museum, you learn that ancient Egyptians would slash figs in order to stimulate ripening. Based on your knowledge of plant hormones you hypothesize that wounding the figs must release:

A. ethylene. B. gibberellin. C. abscisic acid. D. cytokinin. E. indoleacetic acid.

Biology & Microbiology

Answer the following questions true (T) or false (F)

1. Some species of mosses have pollen that does not have to move through water to reach an egg. 2. Endosperm is the nutritional tissue found within a seed. 3. A single type of pinecone is responsible for the production of both pollen and eggs.

Biology & Microbiology