Answer: Increase in number of other grazing animals
Explanation:
Impala feeds on plants. And based on they are found in areas close to rare water and some perspective of desert, they have limited resources to themselves and their young ones. Their major population reducer would be other grazing animals that come to share the same food that they feed on
Answer:
The changes in agriculture significantly altered global populations. The most significant immediate effects of the Columbian exchange were the cultural exchanges and the transfer of people (both free and enslaved) between continents.
Explanation:
The Columbian Exchange greatly affected almost every society on earth, bringing destructive diseases that depopulated many cultures, and also circulating a wide variety of new crops and livestock that, in the long term, increased rather than diminished the world human population.
Answer:
cross-sectional study
Explanation:
A type of study in which data is gathered at one time from groups of participants who represent different age groups is an example of a cross-sectional study. A cross-sectional study is a type of study design that involves subjects who vary in the variable of interest such as age but have a common characteristics and observations are made at a single point in time.
In the scenario from the question, the variable of interest is most likely the effect of varying age groups on personal health. The variable of interest, age group varies but the population has a common characteristic which is that they are Americans and the study is done at a particular time and not spread out as in cohort studies. This is an example of a cross-sectional study.
