Each of the following events actually occurs. Which case would be included in the definition of sexual reproduction?
A. The female sex cell of a flower develops into a new generation after receiving the male sex cell from the same flower.
B. A female sex cell develops into a new individual without fertilization.
C. Three new plants develop from three branches cut from a plant and placed in potting soil.
D. Twins develop.
A. The female sex cell of a flower develops into a new generation after receiving the male sex cell from the same flower.
You might also like to view...
Which of the following statements about the interactions between the hypothalamus and pituitary is false?
a. Most hypothalamic hormones that act on the anterior pituitary are releasers that encourage secretion of hormones by target cells b. The hypothalamus has some neurons whose axons extend into the pituitary's posterior lobe. c. The posterior lobe of the pituitary secretes hormones made in the hypothalamus. d. Antidiuretic hormone (ADH) and oxytocin are synthesized in the cell bodies of neurons in the anterior pituitary.
Which of the following junctions is most abundant in tissues such as skin that are required to resist significant mechanical stress?
A) gap junctions B) desmosomes C) focal adhesions D) tight junctions E) All are abundant in tissues resisting stress.
Electron microscopes have an advantage over light microscopes because
a. electron microscopes allow the viewer to examine living cells. b. electron microscopes have a larger objective aperture. c. electron microscopes are easier to use. d. the wavelength of electrons is shorter than that of light.
The ________ involves proteins in the plasma that are activated when bacteria or fungi are present. These puncture holes in the cell walls of invaders.
A. complement system B. inflammatory response C. macrophagic defense system D. natural killer cell