An atomic nucleus is composed of es
A)
protons.
B)
protons and neutrons.
C)
protons and electrons.
D)
protons, neutrons, and electrons.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation: