Answer the following question given this paragraph: Energy Budgets, Reproductive Costs, and Sexual Selection in Drosophila Research into how animals allocate their energy resources for growth, maintenance, and reproduction has used a variety of experimental animal models. Some of this work has been done using the common fruit fly, Drosophila melanogaster. Studies have shown that not only does reproduction have a cost as far as how long male fruit flies live, but also fruit flies that have already mated several times have limited sperm remaining for reproduction. Fruit flies maximize their last chances at reproduction by selecting optimal mates. In a 1981 study, male fruit flies were placed in enclosures with either virgin or inseminated females. The males that mated with virgin females had shorter life spans than those in contact with the same number of inseminated females with which they were unable to mate. This effect occurred regardless of how large (indicative of their age) the males were. Thus, males that did not mate lived longer, allowing them more opportunities to find mates in the future. More recent studies, performed in 2006, show how males select the female with which they will mate and [3] how this is affected by previous matings (Figure 45.8). Males were allowed to select between smaller and larger females. Findings showed that larger females had greater fecundity, producing twice as many offspring per mating as the smaller females did. Males that had previously mated, and thus had lower supplies of sperm, were termed "resource-depleted," while males that had not mated were termed "nonresource-depleted. " The study showed that although non-resource-depleted males preferentially mated with larger females, this selection of partners was more pronounced in the resource-depleted males. Thus, males with depleted sperm supplies, which were limited in the number of times that they could mate before they replenished their sperm supply, selected larger, more fecund females, thus maximizing their chances for offspring. This study was one of the first to... Q: Studies have shown that not only does reproduction have a cost as far as how long male fruit flies live, but also fruit flies that have already mated several times have limited amounts of this? Choices: - dna - eggs - chromosomes - sperm A:
sperm
(Question)
Answer the following question given this paragraph: Group 13 of the periodic table is also called the boron group because boron (B) is the first element at the top of the group (see Figure below ). Boron is also the only metalloid in this group. The other four elements in the groupaluminum (Al), gallium (Ga), indium (In), and thallium (Tl)are all metals. Group 13 elements have three valence electrons and are fairly reactive. All of them are solids at room temperature. Q: Group 13 of the periodic table is also called what? Choices: - nitrogen group - iron group - manganese group - the boron group A:
(Answer)
the boron group
Ques: Answer the following question given this paragraph: Facts are true. Data, gathered correctly, is factual. Facts and data are not subject to opinion or bias. Q: Refraction happens when light bends from doing what in a new medium? Choices: - changing brightness - changing color - changing trajectory - changing speed A:
Ans: changing speed
(Q).
Answer the following question given this paragraph: Several lethal viruses that cause viral hemorrhagic fever have been discovered, two of which are shown in the Figure below . Ebola outbreaks have been limited mainly to remote areas of the world. However, they have gained extensive media attention because of the high mortality rate23 percent to 90 percentdepending on the strain. The primary hosts of the viruses are thought to be apes in west central Africa, but the virus has also been isolated from bats in the same region. Q: What are the 2 primary hosts of ebola in central africa? Choices: - hyenas and apes - apes and hippos - lions and elephants - apes and bats A:
(A).
apes and bats
Ques:Answer the following question given this paragraph: The ion concentration of neutral, pure water gives water a pH of 7 and sets the standard for defining acids and bases. Acids have a pH lower than 7, and bases have a pH higher than 7. Q: What is the ph level of neutral, pure water? Choices: - six and a half - five - six - seven A:

Ans:seven
Ques:Answer the following question given this paragraph: The crust is less than 1% of Earth by mass. The two types are oceanic crust and continental crust. Q: What are the two types of earth crust? Choices: - reflective and continental - micro and continental - amorphous and continental - oceanic and continental A:

Ans:
oceanic and continental