Answer:
Photosynthetic organisms were making oxygen, but it reacted with the iron dissolved in seawater to form iron oxide minerals on the ocean floor, creating banded iron formations. ... The oxygen that is now in the Earth's atmosphere was not there at the beginning.
Explanation:
Answer: Mendel's choice of garden peas for his studies
Explanation:
Mendel's chose garden peas for his plant breeding studies DUE to the easily distinguishable and discontinuous traits the plant possess.
This traits include:
- flower colour
- flower position
- seed colour
- seed shape
- pod colour
- pod shape
- plant height
He found each of these traits can be expressed as DOMINANT and RECESSIVE i.e they can be easily distinguished by everyone; so he chose garden peas for his plant breeding studies UNLIKE others who chose some other plants with less distinguishable traits
Question 1 is C. and Question 2 is B. (hope this helped)
Answer:
E. Enzyme cleaves PIP2, forming DAG and IP3.
D. IP3 binds to a ligand-gated ion channel in the ER membrane.
A. Calcium ions flow through the ligand-gated ion channel.
C. Calcium ion concentration increases in the cytosol.
B. Calcium ions activate a protein, leading to a cellular response.
Explanation:
The enzyme phospholipase C which cleaves PIP2 into DAG and IP3 Is activated by the G protein once the histamine signaling molecule is received. IP3 moves to the cytosol to bond to IP3 gated calcium channel in the Endoplasmic reticulum membrane allowing for influx of Ca++ from the Endoplasmic reticulum membrane to the cytosol prompting a cellular response. The histamine's signal transduction pathway allows for amplification and regulatation of a signal at different points
Answer:
it takes place in the presence of light.
Explanation:
