A producer is like grass, then consumers like a zebra will eat the grass, and wen the zebra dies its body breaks down and helps more grass grow. That cycle keeps going over and over, it never ends.
The fertilized egg enters a 2-week period of cell division. during this period, the fertilized egg is known as an embryo.
Following sexual intercourse, sperms move from the vagina via the cervix and uterus to the fallopian tubes, where only a single sperm fuses with the egg.
The fertilized egg or the zygote divides constantly as it travels down the fallopian tube to the uterus. Initially, the zygote is transformed into a solid ball of cells after which it changes into a hollow ball of cells i.e. a blastocyst.
The blastocyst gets embedded in the wall of the uterus, where it evolves into an embryo connected to a placenta and enclosed by fluid-filled membranes.
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A is the answer to this problem
Answer:
It means that the cell membrane only lets some molecules/substances through the phospholipid bilayer.
Explanation:
