Why can many ecosystems exist in one biome

Many ecosystems can exist in one biome which is because it is just a geographic area where ecosystems exist. most commonly grouped biomes are desert, deciduous forests, coniferous forests, arctic tundra, tropical rainforests, grasslands, and taigas. There are also marine and freshwater ecosystems that could be considered as water biomes.

Explanation:

all answers true and false

explanation:

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.