Answer: science
Explanation: she was a scientist
Answer:
The correct option is A. Steroid hormones exert their action by entering the nucleus of a cell and initiating or altering the expression of a gene.
Explanation:
Steroid hormones are derived from cholesterol and regulate multiple biological processes. All steroid hormones exert their action by crossing the plasma membrane and by binding with their respective intracellular receptors. They stimulate cell growth in a very different way, their lipophilic nature gives them the ability to cross lipid barriers, so, without the need for extracellular signals, these hormones can easily enter the cell, cross the cytoplasm and reach the nucleus. There they bind to specific receptors that are associated with DNA promoter regions, modifying their structure and promoting the expression of the genes under their control.
If someone pours salt water on a plant that is supposed to receive fresh water, the effects on the plant are swift and severe, beginning with the draining of existing water out of the plant cell.<span> Then, the cell membrane separates from the cell wall in a process known as plasmolysis. Ultimately, the plant shrivels up and no longer thrives</span>
Answer:
it is important bc we need more humans on earth. cause if everyone stopped 'reproducing' when we all die nobody is going to replace us.
Explanation:
The first vertebrates appeared in the Paleozoic Era, specifically the Cambrian period. The vertebrates were <span>jawless fish with backbones made out of cartilages. It was thought that the first fishes evolved during this period. The correct answer to this question is letter "A. Cambrian". I hope this helps.</span>
