A C - only male expressed the disorder and only females carried the disease. This is typical of a special type of diseases where only females are and can be carriers and only men can and are affected. There aren't many diseases like this but they do exist.
Answer:
The geologists cannot use carbon-14 to date ancient rocks because they are older than 50,000 years .Carbon dating can only be used if the substance is less than 50,000 years of age.As compared to the age of the ancient rocks the carbon-14 decays relatively quickly.Other substances like plants ,animals ,wood and leather ,etc can be dated by carbon-14 because they are younger than 50,000 years of age.Most of the rock of interest is older than this this range and hence geologists use different element which has longer half-life than that of carbon.
The answer is "A species"
Could be to do with the basic needs of plants: C02, particular nutrients (nitrogen, phosphorus, potassium) and especially sunlight. Most plants aren’t adapted like coral with algae that provides them with oxygen and the lack of need for sunlight.
