If we take the wolf as a species, then we can easily find its place and evolutionary path through this cladogram of chordates. The wolf is a vertebrate, so we start from vertebrae. It is an animal that has jaws and paired appendages. Continuing further up the cladogram we reach the development of lungs, and the wolfs have lungs for breathing. Then we come to the development of four limbs, and the wolfs have four limbs. Next comes the endothermy, meaning that the animal is able to regulate its own body temperature, thus it is warmblooded, and the wolfs are warmblooded animals. As last we come to the mammals, and the wolfs are part of the mammals, so we can classify them in that branch of the chordate cladogram.
The reason for the shift of mammals from the ecosystem due to increased temperatures and decreased rainfall is the change in the abiotic factors of that region.
Ecosystem is defined as how the living species of an area interact within themselves as well as the with the abiotic factors of the region.
Abiotic factors are the non-living things present in an area. These are the soil, mountains, temperature, sun, water, etc. The livelihood of a species in an area is influenced by both the living as well as the non-living factors. For example, if an organism can survive only in high rainfall then low amount of rainfall will be unfavorable condition for it to survive and grow efficiently.
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Answer:
c. the plant root growing down into the soil
Explanation:
The plant root going down deep into the soil is an example of positive gravitropism. Gravity pulls everything towards the center of earth i.e. downwards and roots follow the direction of gravity automatically by growing downward towards soil that is why it is known as positive gravitropism. In short we can say that root favors the direction of gravity.
Shoot on the other hand show negative geotropism/gravitropism i.e. it grows towards the opposite direction of gravity. Shoot grow towards upside direction i.e. away from the surface towards sky.
Answer:
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Fossils are typically recovered within Sedimentary Rock exposures. This is because Sedimentary rock is the rock found closest to that of Earth, and is practically exposed 24/7 to all of Earth's natural disasters and what-not.
