<u>Answer:</u>
The type of cells that forms the stratum in the epidermis are basal cells.
<u>Explanation:</u>
- Basal cells have the shape of cuboidal stem cell which forms different stratum in the epidermis.
- There are mainly five stratum layers in the epidermis: stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum.
- All these stratum layers have the basic basal cells as its foundation.
- These basal cells have a special ability to continuously divide and form new cells forming the skin.
They do not have external ears like us. but they do have ear holes located directly behind their eyes. frogs ear holes are covered with thin tympanic membranes or the eardrums that protect the inner ear cavity.
Answer: Option (1)
Explanation:
The extinction event played an important role in the creation of new diverse life forms on earth. After an extinction event, both globally and locally, more than 75% of animal species gets vanish and the only those highly resistant life supporting organisms survive and with due course of time, they undergoes evolution, thereby bringing changes to the existing life forms. This is how they initiates and helps in the increasing species diversity.
Thus, the correct answer is option (1).
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