Answer:
Igneous rock
Explanation:
Igneous rock is formed as liquid rock in the form of magma or lava cools. In this case, the water represents lava or magma. Freezing the water changes its phase from a liquid to a solid, similar to the changing of liquid rock (magma or lava) into solid rock.
It is called the cambrian explosion. It is where new groups of organisms arises and are being classified and it is during the period of the cambrian, one of the reason why it was named after it. It has the highest animals found during that time and it could be found on the fossil records that has been established.
Lancelet is a chordate but not a vertebrate because it lacks a backbone
Explanation:
The subphyla of the phylum Chordata are - Vertebrata, Urochordata and cephalochordate
Those chordates with a structural backbone belong to Vertebrata.
Urochordates and cephalochordates lack a backbone and hence are termed invertebrate chordates.
Lancelet is an invertebrate chordate of the subphylum – Cephalochordata.
The lancelets consist of a notochord that extends right from the head till the tail at the dorsal surface. The notochord acts like the backbone and provides support and a semi-flexible structure to aid in the movement of the organism.
They lack a developed nervous system like vertebrates but only has a dorsal nerve tube
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Answer:
23,7_4
There is no information for the tens place and the thousands may be either 9 or three i think
Answer:
there are many steps to be followed while preparing temporary slides for observation under the microscope. Explanation: there is cutting of the tissue into smaller section. This reduces the opacity.
Explanation: