Answer:
IGCSE**
u can just go through the book
<span>If an island had 1000 cats on it, an ecologist would use the word 'population' to describe all the members of that species</span>
Answer: A pictograph is a symbol for a word or phrase.
i hope this helps you :D
The correct answer is d: a
target cell's response is determined by the components of its signal transduction pathways.
The response of a cell to a hormone depends on the cell’s receptor and a signal transduction. When a peptide hormone binds to a receptor on the cell membrane, a second messenger is activated in the cytoplasm. The second messenger has a role of triggering signal transduction leading to the cellular response. Lots of different signal transduction processes (for example, different intracellular proteins) are used to coordinate the behaviour of target cells.
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Pre-embryonic cleavages make use of the abundant cytoplasm of the conceptus as the cells rapidly divide without changing the total volume.