Plants do not have any sensory organs so how do the stems of a plant know to grow up toward the light and the roots of a plant to grow down toward the water?

1. Up unitl day 9, the stem grew the same pace on all plants, but on day 9 the plant seed facing east roots started to slow down and the stem grew faster. day 12 all the stems and roots were the same except for the plant seed facing south where the stem grew a little and the root grew a lot faster than the othersday 15 north and south had the same length of the root and thier second root started growing but the north stem grew more than every other seed.

2. eveything depends on gravity since they cant see and dont have any sensory organs. In mature plants, phototaxis (growing towards the light source) overrides the gravitational impulse for the stalk and leaves, but the roots – and the seed while it is underground – rely on gravity for orientation.

3. Thier root was always facing in the direction of the sun.

4. Phototropism is the characteristic exhibited by plants as they grow towards the main source of light. ... Geotropism is a plant s reaction to the force of gravity. Plant roots react positively to geotropism and grow down, while the stem exhibits a negative response to gravity and grows upward in the opposite direction

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.