Written by Irene Chang  A. How much energy must be absorbed by 20.0 g of water to increase its temperature from 283.0 K to 303.0 K? (specific heat of water = 4.179 J/gK) B. If it takes 41.72 joules to heat a piece of gold weighing 18.69 g from 10.0 °C to 27.0 °C, what...

Written by Merel Dagher (PEACE Advisor)  One of the differences between monocots and “dicots” is the fate of the endosperm. Describe the ploidy and what happens in these different types of flowers. a.     Ploidy: 3n, as a result of the sperm fertilizing the two polar nuclei; in monocots, the endosperm is absorbed by the...

Written by Merel Dagher (PEACE Advisor)  Which of the following are single-celled organisms? Select all that apply. a.     Archaea b.     Bacteria c.     Fungi d.     Protists e.     All of the above Click “Read More” to see the answer(s).  The correct answer is both a and b. Archaea and Bacteria are domains that consist of prokaryotes....

Written by Merel Dagher (PEACE Advisor)  What is a simple fruit? a.     the flower contains multiple ovaries b.     multiple flowers with many ovaries c.     one flower with one ovary d.     none of the aboveClick “Read More” to see the answer.  The correct answer is c. A simple fruit is one that comes from one...

Written by Merel Dagher (PEACE Advisor)  Describe the atmosphere when ecological systems formed roughly 4 billion years ago. a.     Oxygen was abundant in the environment b.     The conditions were the same as now c.     CO2, NH4+, CH4, and NO were present at high concentrations d.     The ozone layer had formed completely Click “Read More” to...

Written by Merel Dagher (PEACE Advisor)  Some organisms rely on smell, while others rely on sight, to guide them to a flower’s nectar. Which of the choices below matches the organism to the mechanism it uses to find the nectar/fruits/flowers? (more than one may be correct).a.     Bees – use sight to find flowers; sense of...

Written by Merel Dagher (PEACE Advisor)  What is the approximate age of the universe? (More than one answer may be correct)  a.     14 billion years ago b.     14 Ga c.     14 million years ago d.     14 Ma Click “Read More” to see the answer.  The correct answer is either a or b. The universe...

Written by Merel Dagher (PEACE Advisor)  There are three layers of tissues in stems. What cells correspond with each respective layer? a. Dermal: Epidermis, Periderm; Ground: Parenchyma, Collenchyma, Sclerenchyma; Vascular: Xylem, Phloem  b. Dermal: Epidermis; Ground: Periderm, Parenchyma, Collenchyma, Sclerenchyma; Vascular: Xylem, Phloem  c. Dermal: Epidermis, Periderm; Ground: Parenchyma, Sclerenchyma; Vascular: Collenchyma, Xylem, Phloem  d. Dermal: Epidermis, Periderm;...

Written by Merel Dagher (PEACE Advisor)  The transition from ovule to seed in gymnosperms results in a change in ploidy of the three layers of the ovule. In an unfertilized ovule, the megaspore is haploid, the layer that surrounds it (megasporangium) is diploid, and the outer layer (integument) is diploid. What are the names...

Written by Merel Dagher (PEACE Advisor)  Which of the following are heterosporous? Select all that apply. a.     Ferns b.     Moss c.     Cycadophyta d.     Monocots e.     Lycophytes Click “Read More” to see the answer.  The correct answers are c, d, and e, though not all lycophytes are heterosporous (meaning they possess microspores and megaspores); Selaginella...