*Question*
Answer the following question given this paragraph: Six atoms are evenly organized around a central atom. Q: How many atoms are evenly organized around a central atom? Choices: - four - five - seven - six A:
**Answer**
six

*Question*
Answer the following question given this paragraph: 41.2 The main stages of food processing are ingestion, digestion, absorption, and elimination. Q: What are the four stages of food processing? Choices: - ingestion, digestion, elimination and extinction - ingestion, digestion, absorption, and reproduction - ingestion, reproduction, absorption, and elimination - ingestion, digestion, absorption, and elimination A:
**Answer**
ingestion, digestion, absorption, and elimination

*Question*
Answer the following question given this paragraph: Archaeplastida Red algae and green algae are included in the supergroup Archaeplastida. It was from a common ancestor of these protists that the land plants evolved, since their closest relatives are found in this group. Molecular evidence supports that all Archaeplastida are descendents of an endosymbiotic relationship between a heterotrophic protist and a cyanobacterium. The red and green algae include unicellular, multicellular, and colonial forms. Red Algae Red algae, or rhodophytes, are primarily multicellular, lack flagella, and range in size from microscopic, unicellular protists to large, multicellular forms grouped into the informal seaweed category. The red algae life cycle is an alternation of generations. Some species of red algae contain phycoerythrins, photosynthetic accessory pigments that are red in color and. Q: In which supergroup are red algae and green algae included? Choices: - xerophyte - spirogyra - troglodyte - archaeplastida A:
**Answer**
archaeplastida

*Question*
Answer the following question given this paragraph: In Silver Springs, the TLTE between the first two trophic levels was approximately 14.8 percent. The low efficiency of energy transfer between trophic levels is usually the major factor that limits the length of food chains observed in a food web. The fact is, after four to six energy transfers, there is not enough energy left to support another trophic level. In the Lake Ontario example shown in Figure 46.6, only three energy transfers occurred between the primary producer, (green algae), and the apex consumer (Chinook salmon). Ecologists have many different methods of measuring energy transfers within ecosystems. Some transfers are easier or more difficult to measure depending on the complexity of the ecosystem and how much access scientists have to observe the ecosystem. In other words, some ecosystems are more difficult to study than others, and sometimes the quantification of energy transfers has to be estimated. Another main parameter that is important in characterizing energy flow within an ecosystem is the net production efficiency. Net production efficiency (NPE) allows ecologists to quantify how efficiently organisms of a particular trophic level incorporate the energy they receive into biomass; it is calculated using the following formula:. Q: Net production efficiency allows ecologists to quantify how efficiently organisms of a particular what incorporate the energy they receive into biomass? Choices: - hypothesized level - neural level - sea level - trophic level A:
**Answer**
trophic level