Answer:
C) The continents were once connected.
Explanation:
All the continents were once part of the super-continent called Pangaea. Continental drift split it into fragments and led to the formation of the present-day continents. Since all the continents were connected, some of the cacti native to tropical western Africa must have been carried to present-day America.
The cacti populations present in America and tropical western Africa accumulated genetic variations to get adapted to the prevailing environmental conditions. Separation of continents by continental drift led to their geographical isolation and prevented any interbreeding between the populations. Over generations, the cacti present in two continents evolved into separate species.
Answer:
Primary succession because you have to find the resources to be able to produce that succession. Hope that helps!
Okay what shall i help you with
Decomposition - decomposition is something we humans benefit a lot from in agriculture.
Immunity - reffering to the help that bacteria gives us in the immune syste.
Pollution control - reffering to the fact that some bacteria decompose man - made pollutants such as DDT, petroleum, etc.
Symbiosis - reffering to the help some symbiotic bacteria pose to humans by decomposing vitamins B and K.
Hope it helped,
BioTeacher101
Answer:
Skeletal muscles generate heat. Muscle contraction requires energy and produces heat as a byproduct of metabolism.
Explanation:
Hope this helps!!!!!!!!!!
Forever friend and helper,
Cammie:)
