For starters, plant cells have a tough Cell Wall made from cellulose, while animal cells only have the thin Cell Membrane. Also, plant cells have Plastids, while animal cells do not.
The primary organelle which is present in plant cells but not in animal cells, however, are the Chloroplasts, which allow plant cells to carry on the natural process of photosynthesis, by which plants make their own food using sunlight, water, and nutrients from the soil.
Hope that helped =)
In a comparison of birds and mammals, having four appendages is <span>a shared ancestral character</span>
The water cycle and the oxygen cycle
Answer:
progesterone
Explanation:
Progesterone, unlike estrogen, has no activity on determining female sexual characteristics. Progesterone activity is to prepare the uterus for possible pregnancy by growing the endometrial lining of the uterus and receiving the fertilized egg and stimulating milk production.
Progesterone is directly responsible for maintaining and sustaining the fetus in the womb, stimulating, during the first two weeks of pregnancy, the fallopian tube and endometrial glands to secrete nutrients essential for the zygote. Uterine contractions are inhibited to prevent the fetus being expelled as it blocks prostaglandin production and decreases oxytocin sensitivity.
<span>Cheese, yogurt, bread e.t.c..............</span>
