What component of the human epidermis functions to make the skin's surface extremely tough and resistant to bacterial enzymes?
select one:
a. keratin
b. hypodermis
c. proteases
d. dermis

A. Keratin

Explanation:

Keratin is the tough and fibrous intercellular protein. It is present in the skin cells and makes them resistant against microbes and chemicals. Most of the epidermal cells are keratinocytes that produce keratin protein. And the presence of keratin proteins makes the skin tough and protects it from chemicals of microbial origins.

science-ocean floors and habitats study guide by volleyballqueen3817 a major advance in ocean-floor mapping. list four sections of the ocean floor. algae that use sunlight to produce their own food through photosynthesis. all of the feeding relationships that exist in a habitat. drying out, predators, find food.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.