The introduction of caulerpa, also known as killer algae, into california was ultimately the result of

hull fouling

Hull fouling.

Explanation: Hull fouling can be defined as the way by which the organisms attach themselves to the hull of the ship during the voyage and transport themselves to long distances.

Aquatic plants, are transported easily when the plant fragments gets attached to the boat. Sometimes the tangled plant fragments slows down the speed of the boat.

The introduction of Caulerpa, the killer algae was also introduced in this way.

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.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs