Answer:
Preservation of remains (protection against scavenging, erosion and environmental damage) High pressure to promote mineralisation of remains (i.e. turn hard body parts into fossilised rocks) Anoxic (low oxygen) conditions to protect against oxygen damage and prevent decomposition by saprotrophs
Explanation:
An animal that is healthier will have a better chance of survival due to better strength, and also be better suited to winning a mate. Animals that are weak or sick are most likely to die off or be killed by a predator or natural reasons, if this animal survives, it will most likely not get a mate because the mate will not be attracted to the sickened animal, considering how most animals search for a healthy mate to reproduce with. (Usually there is some type of court ship dance or song of some sort, and it is usually the more healthy animal that is able to "perform" the best dance/song for the mate it is trying to win over) Hope that this helped!
Answer:
Make sure all tested rats are the same age.
Offer the same type of food to the rats in each trial.
Explanation:
<em>In order to be able to isolate the effects of one particular variable during a research, all the subjects in each trial must be subjected to the same conditions except the variable whose effects is being isolated.</em>
Hence, Kate must offer the same type of food to the rats in each trial as well as make sure that all tested rats are the same age.
Many Cnidarians eat small planktonic animals that they catch with their tentacles and stinging nematocysts. They don't go "hunting" but have to wait for their prey to blunder into the tentacles. Once this has happened other tentacles are brought to the prey to secure capture and subdue it with more stinging cells. The larger jellyfish can capture small fish this way too.Cnidarians have tentacles that are around the mouth which help them to catch and eat food, they use their nematocysts to fire out barbs or toxins at the prey to kill, injure, or paralyze them. Almost all cnidarians are carnivores, and feed mainly on shrimps, amphipods, plankton, and any other small organism that gets trapped in the tentacles. Once the prey is entangled in the discharged nematocysts it is moved into the mouth and digested in its gastrovascular cavity.
