Male gamete of a plant has 20 chromosomes. State the number of chromosomes in a) Female gamete
b) zygote
c). endosperm
d). cells of sepals

What does resonance result in? quieter sounds frequency amplitude louder sounds

What best describes lactic acid fermentation?

Plz will mark! the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?