Answer:
Scientific names for this type of structure include exoskeleton, test, carapace, and peltidium.
The shells that are perhaps most familiar and most commonly encountered, both in the wild and for sale as decorative objects, are seashells, more precisely, the external shells of marine mollusks.
EDNA(environmental DNA) is DNA that is found in samples from an environment like say water samples or soil samples but without first isolating any target organisms. using eDNA in trying to track fish in a river would be very hard if not impossible because you have not found the initial target you only got samples from water or soil.
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Answer:
Accretion
Explanation:
The Nebular also known as blank theory suggest that Protoplanets began to form around the protosun from many collisions and combinations of gas and natter called Accretion.
Protoplanets are basically extremely small planets that have the size very similar with the size of moon. It is commonly viewed by astronomers that some celestial objects were formed during the process of formation of solar system that are now considered as protoplanets. They were a whirling cloud of gas and dust that condensed down and formed this combination of matter and gas called Accretion.
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Answer:
A limiting factor is anything that constrains a population's size and slows or stops it from growing. Some examples of limiting factors are biotic, like food, mates, and competition with other organisms for resources. Others are abiotic, like space, temperature, altitude, and amount of sunlight available in an environment. Limiting factors are usually expressed as a lack of a particular resource. For example, if there are not enough prey animals in a forest to feed a large population of predators, then food becomes a limiting factor. Likewise, if there is not enough space in a pond for a large number of fish, then space becomes a limiting factor. There can be many different limiting factors at work in a single habitat, and the same limiting factors can affect the populations of both plant and animal species. Ultimately, limiting factors determine a habitat's carrying capacity, which is the maximum size of the population it can support.
Explanation:
https://www.nationalgeographic.org/topics/limiting-factors/?q=&page=1&per_page=25
It was during the Paleozoic Era that plants (first known from microfossils called cryptospores that appear in the mid-Ordovician, about 470 million years ago; Wellman and Gray 2000) and animals (known from Silurian fossils, at least 423 million years ago; Wilson and Anderson 2004) began to colonize the land
