Why does meiosis produce cells with half the chromosomes

An example of a double displacement reaction is

Explain the processes that lead to the exocytosis of neurotransmitter from a presynaptic cell. which components are recycled? which ion is important in triggering exocytosis?

A researcher has hypothesized that the chemical tributyltin (an additive in boat paint) seeps into the water causing reproductive defects in developing marine snails.

Unlike RNA, DNA contains a. phosphate groups b. uracil c. adenine d. thymine

If fossil species A is consistently recovered from geological deposits beneath layers containing fossil species B, then A is considered older than B. This dating technique is based on the principle of:

If an object with a mass of 100 kg on earth is taken to a planet that has more gravity, how will this affect the object's mass and weight?

Lamarck's mechanism of change can be called

What is carrying capacity and what does it mean for ecosystems?

Why was the evolution of a coelom a critically important innovation for animals? a) The coelom can act as a hydrostatic skeleton. b) The coelom gives rise to a complex nervous system. c) The coelom made it possible for animals to colonize land.

Marine mammals, with a few exceptions, are a. oviparous b. ovoviviparous c. viviparous