What is the only genotype that will produce ab type of blood? is it

Which of the following sex and generation combinations directly produces the pollen tube of angiosperms? a) male gametophyteb) female gametophytec) male sporophyted) female sporophyte

How many species of living things are alive on earth today? more than 1,000,000 none of these answers are correct 100-500 1,000 –500,000 o 500,000 -1,000,000

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions