Answer:
Biosphere
Explanation:
The biosphere contributes to life. The biosphere is important for the survival of our own lives, and it also it is the zone of the earth where the air, land, water, and other abiotic elements interact together to support our whole lives.
Answer:
four haploid daughter cells
Explanation:
each with the same number of chromosomes.
Answer:
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Exoskeleton
Exoskeleton is a evolutionary innovation. This is operated by muscles attached to it and acts as an armor. Other than support this is an adaptive mechanism to provide protection against predators. In vertebrates, it is considered as the dermal bone that developed via membranous ossification. Fishes retained their exoskeleton in the form of their scales. However, in some organisms terrestrial evolution allows the loss of exoskeleton and formed a more mobile endoskeleton,
Explanation:
Index fossils are fossils type fossils that are used to identify stratigraphic records and their positions. They are vey key in determining relative ages of rock sequences.
- These fossils have a short vertical stratigraphic range.
- Index fossils have short evolutionary history.
- They are widely distributed in nature.
- Examples of index fossils are trilobites and ammonites.
