List one Darwin and Wallace's observations and conclusions explaining biological evolution
What will be an ideal response?
ANSWER: 1. Most organisms can produce numerous offspring, but environmental factors limit the
number that actually survive and reproduce.
2. Heritable variations allow some individuals to compete more successfully for space, food,
and mates.
3. These successful individuals somehow pass the favorable characteristics to their offspring.
4. As a result, the favorable traits become more common in the next generation, and less
successful traits become less common.
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The volume of air normally breathed in and out of the lungs in a single breath at rest is referred to as the _____ volume.
A. tidal B. total C. reserve D. inspiratory reserve E. expiratory reserve
Which of these plant tissue types is composed of cells with primary walls thickened at the corners that provide support for immature parts of the cell body?
A. collenchyma B. phloem C. sclerenchyma D. xylem E. parenchyma
Sensilla are sensory hairs involved in taste and smell
____________________ Indicate whether the statement is true or false.
You observe a cell under a microscope and you can clearly see a cell wall, a vacuole, and cytoplasmic connections. These cytoplasmic connections must be
A) plasmodesmata. B) desmosomes. C) gap junctions. D) osmotic channels. E) tight junctions.