In what way does the life cycle and reproduction of seedless vascular plants resemble the life cycle and reproduction of amphibians?
What will be an ideal response?
In both cases the adults are well adapted to life on dry land, but both need free water in order to reproduce.
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Answer the following statements true (T) or false (F)
1. The current model that best describes biomembranes is the Rigid Mosaic Model. 2. Diffusion is the movement of a molecule from an area of high to low concentration. 3. Osmosis describes the movement of water from an area of high to low solute concentration. 4. Movement of molecules down their concentration gradient can drive the movement of a different molecule against its concentration gradient.
_____ is believed to be the most important serine protease, because its ability to degrade several matrix components giving cancer cells the ability to migrate.
a. plasminogen b. plasmin c. fibronectin d. laminin
The placenta ____.
A. forms from endometrial and extraembryonic tissues B. will cover about one-half of the inner uterine surface at full term C. intermingles fetal blood with maternal blood D. secretes only estrogen to maintain the uterine lining during the second and third trimesters E. secretes only progesterone to maintain the uterine lining during the second and third trimesters
Which of these processes brings into the cell large macromolecules and particles by the formation of a vesicle in the outer membrane?
A) pinocytosis B) exocytosis C) endocytosis D) facilitated transport