Evolution occurs in all life, all the time.
Cactus is Singular. Cacti is Plural. Examples: I saw a cactus at the national park. I saw cacti at the natural park. This is not correct: I saw a cacti at the national park.
A natural growth of spines in the body.
To determine if evolution by natural selection is occurring in a cactus population, you would need to observe changes in the heritable traits of the cacti over time, caused by differences in survival and reproduction. This would indicate that certain traits are being favored, leading to a shift in the genetic makeup of the population.
No, cacti are strictly plants of the Americas. If they are found elsewhere they are not natural and would be considered an invasive species.
Frederic Richard McQuown has written: 'Fire-flowered Cacti' 'Plant breeding for gardeners; a guide to practical hybridizing' -- subject(s): Plant breeding 'Intelligent gardening'
yes because that would be their natural habitat
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Cacti are only found naturally in the Americas. If any show up in the Arabian Desert, they were planted there. They do not grow naturally in that desert.
A mix of the two is the best. Plus, you have to remember that it has to be watered. But it might be best to put it in sand because in shows and movies it shows cacti in their natural environment.
You can see saguaro cacti in their natural habitat in the Sonoran Desert, which spans parts of Arizona, California, and Mexico.
Cactus is singular. The plural forms are cacti or cactuses, both are accepted.Examples:I saw a cactus at the national park.I saw some cacti at the natural park.We have several flowering cactuses in stock.