Answer:Precambrian oxygen was quickly used up by algae and plants.
Explanation:Around three billion years ago, the atmosphere of earth during the Precambrian time was virtually devoid of oxygen. The oxygen was produced as the byproduct of the photosynthetic activities of the cyanobacteria. The level of the gas raised and reached upto one percent about 2 billion years ago
Answer Competition between wild large carnivores can hardly be measured experimentally. However, it may be evaluated by comparing the spatial distribution of each species, while controlling for landscape‐related variables (Apps et al. 2006). In a gradient of spatial levels, populations range geographically in a landscape, animals establish home ranges, choose habitat patches, and, finally, select particular sites, such as dens or daybeds (Johnson 1980). Competition may be influential at each level if the presence of a competitor affects where to settle down and/or limits resource use. This is particularly interesting in situations where the recovery of a large carnivore occurs in an area already inhabited by another carnivore and both species have some common requirements of habitat or resources, which can
Individual interactions have been documented between gray wolves (Canis lupus) and brown bears (Ursus arctos). Brown bears are omnivorous, but both species prey on ungulates and using the same food resources can lead to potentially lead to spatial and/or exploitative competition.exploitative competition. Bears often kleptoparasitize wolf kills in North America (Ballard et al. 2003, Smith et al. 2003) and in Scandinavia (e.g., Milleret 2011). However, wolves can prevail at carcasses and simultaneous scavenging by both species also has been reported (Smith et al. 2003, Lewis and Lafferty 2014). Wolves and bears can also kill each other (Ballard et al. 2003, Gunther and Smith 2004). Therefore, the outcome of individual interactions between these species includes all of the above–mentioned forms of interspecific competition between carnivores. Nevertheless, beyond individual interactions, we lack knowledge about the effects of wolf–bear competition at the population level for both species (Ballard et al. 2003).
I
Explanation:
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Answer:
carbohydrates
Explanation:
Sucrose is a sugar, and sugars are a type of carbohydrate.
