Answer:
B.
Explanation:
D is wrong because it Increases gentetic diversity
C we are talking about the chromosome not the cell
A That is later on in telophase I
In a tropical forest, there are many tall trees with long leaves that block the sunlight. This top layer is also called the canopy. Since they block the sunlight, there is only a few number of plants that can live on the ground because they don't receive enough sunlight to survive.
Answer:
thigmotropism
Explanation:
Tigmotropism is the curved growth of the plant, which occurs through mechanical stimulation. In the case of the question, the stone stimulated the plant's angular growth.
When the vegetable comes into contact with any consistent object, it grows around it. A very common example of tigmotropism is that of tendrils, which grow wrapped around its support. The winding occurs by a reaction that results from a stimulus from the underside of the tendril, this reaction slows the growth of this side, while the upper side grows faster.
<h2>GPCRs and RTKs</h2>
Explanation:
1) Phosphorylation of receptor can terminate signal or desensitize receptor: GPCRs because when signal persists a protein kinase receptor is activated,this further catalyse the phosphorylation of several serine residue at cytosolic phase of 7 transmembrane
Phosphorylated transmembrane recognized by arrestin protein blocks interaction between trimeric G protein and receptor thus blocks signal transduction
2) Autophosphorylation of receptor can initiate signal: RTKs because receptor dimerization activates intrinsic tyrosine kinase activity by which they phosphorylate its own tyrosine residue on cytosolic phase
3) Structure contains seven transmembrane helices: GPCRs because it consists of single polypeptide and spans the membrane 7 times hence called 7 transmembrane;it recognizes external signal and activates trimeric G protein
4) Ligand binding induces conformational change in receptor: RTKs because normally RTK exist in monomeric form in absence of any ligand molecule but when any ligand molecule binds receptor starts to dimerize
5) Receptor activation causes phosphorylation of its cytosolic subunits: RTKs because when receptor gets activates the intrinsic tyrosine kinase activity by which they phosphorylate its cytosolic subunits
6) An example is the insulin receptor: Insulin receptor is present on plasma membrane and belongs to RTK family and always exist in dimeric form
7) Transports some ligands through the membrane: Neither GPCR nor RTK;ligand gets transported through the membrane through ligand gated channel
8) An example is the epinephrine receptor: Epinephrine is an endocrine hormone produced by adrenal glands in stress condition and prepare body for fight and flight;Epinephrine uses GPCR signalling pathway by four different types of membrane receptors in different tissues
9) Activate heterotrimeric G proteins directly: Transmembrane protein of GPCR recognizes the external signal and activates G protein,activated G protein binds with effector enzyme and activate it which further produce or destroy secondary messenger that carry message from cell surface to cell interior
The electron is.
The electron is the subatomic particle most famous for characteristic behaviors observed in the context of chemical bonding.
