The answers are A) ectoderm and B) endoderm.
Fertilization is a fusion of male and female gametes which leads to the formation of a zygote. The zygote undergoes mitosis and transforms into a single-layered blastula. Gastrulation is a transformation of the blastula into a two-layer or three-layer gastrula. Cnidarians are a diploblastic animal because their gastrula has only two layers - endoderm and ectoderm.
Explanation:
Temperature is the amount of heat energy contained in the air, and we measure this in degrees. Air pressure is the amount of pressure exerted by the air in a particular air mass. Humidity is a measure of the water content of the air mass. Clouds are tiny drops of water or ice that form in the atmosphere.
Answer:
The ozone layer in the stratosphere blocks out the sun's deadly ultraviolet rays. It acts as our planet's natural sunblock.
The answer is 60%
Biomes are regions which have similar climate as well as the vegetation. Many people have defined the biomes on different basis some based on temperature , some on vegetation and many others.Some major terrestrial biomes include tropical forests, savannas, deserts, tundra, temperate deciduous forests etc
