B: during the early stages of meiosis, chromosomes in a homologous pair exchange segments, the process is called Crossing over.
Answer:
nourish the placenta
Explanation:
The hormone called human placental lactogen (hPL) is a hormone secreted by the placenta, which functions to supply nutrients and oxygen to the growing fetus in the womb.
The human placental lactogen is produced to help in the efficient use of ingested food substances in the production of energy (metabolism). This indirectly helps to nourish the placenta because if the mother efficiently converts food into nutrients, the placenta is also adequately nourished.
The correct answer is graft the scion onto a good rootstock
Answer:living organisms need water to survive.
Some such as fish can breathe in water.
Others need water to break down food molecules or to get energy.
Explanation:
Some form of plant life. It could be a tree, flower, even a simple blade of grass.
