Answer: b
Explanation:
no environmental exposure has been proved
Answer: Fossils and primitive drawings in several digs around the world continents.
Explanation: I would expect to find fossils and primitive drawings of these several thousand African migrants on different areas around the world. I would like to find primitive bones, specially skulls and teeths and stones with drawings and old writings representing the life of these small population in Africa who made the entire human population.
ANSWER:
Problem faced include; habitat loss and degradation, disease outbreak, invasive species, pollution, over‐exploitation/overfishing, climate change etc.
EXPLANATION:
Problem:
Habitat loss and degradation, disease outbreak, invasive species, pollution, over‐exploitation/overfishing, and climate change are notable problems experienced by freshwater and marine fishes.
Solution:
Anthropogenic activities and stressors that rapidly threaten freshwater and marine fishes are curbed through legislation and other means to prevent extinction of fishes.
Through conservation programs that plans for individual species to more species of entire faunas of a particular location also boost population size and prevent hunting of threatened or endangered species in both realms.
Overtime, genetically modified fishes which can develop resistance to diseases are introduced to the realm.
Moreso, waste channels through which pollutants gets into the water bodies are well-treated for safety of fishes.
A positively charged ion is called cation.
A negatively charged ion is called anion.
A salt is formed by the ionic bonding of a cation and an anion.
pH is a measure of the hydrogen ion concentration in a solution.
Emotion is one of the responses of an organism (whole) which
involves physiological arousal. Other than indicating emotion, physiological
arousal or heightened physiological activity is modernly used in polygraphs.
Polygraphs or lie detector notes changes in blood pressure, pulse, respiration
while the subject is asked and answers questions. It is based on the assumption
that dishonest answers are indicated with physiological arousal.
