Answer the following question given this paragraph: Prokaryotic cells are extremely small and have a variety of shapes. Most have flagella and a cell wall. They have several other cell structures as well. Their DNA exists as large and small loops. Some prokaryotes form biofilms, which are colonies of cells stuck to a surface. Q: What are colonies of cells stuck to a surface called? Choices: - membranes - cellular coating - membranes - biofilms A:
biofilms
(Question)
Answer the following question given this paragraph: Figure 4.22 Microfilaments thicken the cortex around the inner edge of a cell; like rubber bands, they resist tension. Microtubules are found in the interior of the cell where they maintain cell shape by resisting compressive forces. Intermediate filaments are found throughout the cell and hold organelles in place. Q: What thickens the cortex around the inner edge of a cell? Choices: - mitochondria - vacuoles - plasma membrane - microfilaments A:
(Answer)
microfilaments
Ques: Answer the following question given this paragraph: Life on Earth is carbon-based. Organisms need not only energy but also carbon atoms for building bodies. For nearly all life, the ultimate source of carbon is carbon dioxide (CO 2 ), an inorganic molecule. CO 2 makes up less than 1% of the Earth's atmosphere. Q: Life on earth is carbon-based. organisms need not only energy but also carbon ________ for building bodies? Choices: - monoxide - ions - crystals - atoms A:
Ans: atoms
(Q).
Answer the following question given this paragraph: External Fertilization External fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water. After the sperm reaches the egg, fertilization takes place. Most external fertilization happens during the process of spawning where one or several females release their eggs and the male(s) release sperm in the same area, at the same time. The release. Q: What type of fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water? Choices: - static - material - Internal - external A:
(A).
external
Ques:Answer the following question given this paragraph: Wallace and Darwin both observed similar patterns in other organisms and independently conceived a mechanism to explain how and why such changes could take place. Darwin called this mechanism natural selection. Natural selection, Darwin argued, was an inevitable outcome of three principles that operated in nature. First, the characteristics of organisms are inherited, or passed from parent to offspring. Second, more offspring are produced than are able to survive; in other words, resources for survival and reproduction are limited. The capacity for reproduction in all organisms outstrips the availability of resources to support their numbers. Thus, there is a competition for those resources in each generation. Both Darwin and Wallace's understanding of this principle came from reading an essay by the economist Thomas Malthus, who discussed this principle in relation to human populations. Third, offspring vary among each other in regard to their characteristics and those variations are inherited. Out of these three principles, Darwin and Wallace reasoned that offspring with inherited characteristics that allow them to best compete for limited resources will survive and have more offspring than those individuals with variations that are less able to compete. Because characteristics are inherited, these traits will be better represented in the next generation. This will lead to change in populations over generations in a process that Darwin called "descent with modification. " Papers by Darwin and Wallace (Figure 11.3) presenting the idea of natural selection were read together in 1858 before the Linnaean Society in London. The following year Darwin's book, On the Origin of Species, was published, which outlined in considerable detail his arguments for evolution by natural selection. Q: What did darwin call the evolutionary concept of change in populations over generations? Choices: - formation with modifications - reproduction with modifications - metabolism with modifications - descent with modifications A:

Ans:descent with modifications
Question: Answer the following question given this paragraph: Q: What evolutionary concept characterizes a species by body shape and other structural features? Choices: - geologic species concept - spontaneous evolution theory - primary speciation - morphological species concept A:
Answer:
morphological species concept