What does a vaccine contain? 1.T cells
2.infectious particles
3.antigens
4.antibodies

Genetic diversity is the variation in the genes of an entire species. each circle represents a population of a particular species in different habitats. select the population with maximum genetic diversity

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.

Drag each description to the correct location on the image. not all descriptions will be used. describe the parts of a comet. the frozen part of the comet the atmosphere of gases and dust formed when the nucleus vaporizes tail made of small, solid dust particles tail made of ions that appears to point away from the comet's orbit