What feature allowed seed bearing plants to finally break with their need for moist environments?

A. Vascular tissue
B. Spores
C. Pollen
D. Fruit


Ans: C. Pollen

Biology & Microbiology

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Cells become progressively committed to specific patterns of gene activity and developmental fate through a process

known as: a. morphogenesis. b. determination. c. cell differentiation. d. pattern formation. e. growth.

Biology & Microbiology

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

1. The amount of energy required for a reaction to occur is its activation energy. 2. Accumulation of a metabolic pathway product may result in decreased activity of the pathway enzymes. 3. As the concentration of substrate increases, the activity of the enzyme decreases.

Biology & Microbiology

Why is an AT-rich sequence characteristic of DNA replicators in all organisms?

What will be an ideal response?

Biology & Microbiology

What is an exception to the standard biological species concept used to define a species?

A) Species that coevolved cannot be distinguished using this concept. B) Natural interbreeding populations cannot be distinguished using this concept. C) Asexual species cannot be distinguished using this concept. D) Species that do not resemble one another cannot be distinguished using this concept.

Biology & Microbiology