Cyanobacteria capable of fixing atmospheric N2 always produce heterocysts.

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


False

Biology & Microbiology

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In meiosis, the number of chromosomes ______ while in mitosis, it ______.

(a) is halved/is doubled (b) is halved/remains the same (c) is doubled/is halved (d) remains the same/is halved

Biology & Microbiology

Which of the following facts supports the claim that mitochondria developed from bacteria that were long ago phagocytosed into eukaryotic cells?

a. Mitochondria have their own DNA. b. Mitochondria are the "powerhouses" of the cell. c. Mitochondria have proteins for the synthesis of ATP. d. Mitochondria have flagella for motion. e. Mitochondria are small and easily transported across the membrane.

Biology & Microbiology

In humans, having dimples in the cheeks is an autosomal dominant trait. If a child has dimples but only one of her parents does, what are the genotypes of her parents? (D = dimples; d = no dimples)

A. One parent Dd; other parent DD B. One parent dd; other parent DD C. One parent dd; other parent Dd D. One parent must be dd; the other parent could be either Dd or DD E. One parent must be DD; the other parent could be either dd or Dd

Biology & Microbiology

In lipids, there is a 2:1 ratio of H to O.

a. true b. false

Biology & Microbiology