Animals includes only multicellular heterotrophs
When an antigen invades a mammals body, specific immune cells engulf and ingest it. Some of the digested pieces are displayed on the cells bodies, the next step will be that B cells are activated and release antibodies. The correct answer is A.
Explanation:
The highest rate of cell division is a human embryo. Once the sperm finds a viable egg in fallopian tube, it travels to the uterus. Attaches to the uterus where it is called a zygote then begins to multiply rapidly, along with the placenta (from which the developing embryo gets o2, food source, all nutrients a fetus needs to grow,to develop the unborn fetus..
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Answer:
C) we’re cutting down trees faster than they can grow back.
Explanation:
If we are cutting down thousands of trees in just seconds, they still cannot grow back in a couple of seconds.
It takes months and years for them to grow back.
So we need to be mindful of our resources, even if they're renewable.