Answer: adenine, thymine, guanine and cytosine
Explanation: Adenine always binds with thymine, and cytosine always binds with guanine.
B. Ecosystem. The lake contains other species and is a complex interconnected system.
leptotene : homologus pairing is formed and chromosomes start to get closer to each other.
zygotene: synapsis is formed between homologus chromosomes which is apoint oattachment.
pachytene:crosing over occer that homologus chromosomes exchange THIER GENETIC METERIALS.
DIPLOTENE: chiasmata formation disapear which was formed in pachytene.
diakinasis:homologus chromosomes start to seperate from each other.
the answer is b recycling newspapers
