I think the correct answer would be the last option. Monozygotic twins are identical, while dizygotic twins are fraternal. Identical twins involves developing from one zygote where it splits, forming two embryos so that the twins would have more or less the same characteristics. This type of twins can share the same amniotic sac depending on the time the fertilized egg is divided. On the other hand, fraternal twins developed from two eggs wherein they are being fertilized by two different sperm cells resulting to twins which has different characteristics. For this type, the two fertilized eggs would develop separate amniotic sacs.
Answer:
6==. During spermatogenesis, four sperm result from each primary spermatocyte, which divides into two haploid secondary spermatocytes; these cells will go through a second meiotic division to produce four spermatids
Producers : Cactus, Sagebrush, annual flowers
Level 1 consumers: Ants, Beetles, Kangaroo rats.
Level 2 consumers: Chuckwalla, Tarantulas, Scorpions
Level 3 consumers: Common king snake, Gila monster, Turkey
Level 4 consumers: Vulture, Hawk, Fox
Decomposers: Bacteria
In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46.
Answer. They are the “last trophic level” in some hierarchies because they feed on everything (National Geographic). However, according to the strict trophic level definition they would be primary consumers.
