Rabbit ear size tends to decrease as latitude increases. this is an example of a cline
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A cline can be described as a change of the biological trait of a species across its geographical range. A cline can be genetic for example, change in the allele frequency, or phenotypic (change in body size). The change can be shown as continuous gradation, or it can be more abrupt from one geographic region to the next.
Answer:
D. Selection has led to decreases in the size of fish at the age of reproductive maturity.
Explanation:
The larger body size of the fishes is not an adaptive trait as it reduces the survival chances of these fishes. The process of natural selection tends to increase the frequency of the traits that increase the survival fitness of the organisms. Here, the fishes with smaller body size at the reproductive age have greater chances of survival and would reproduce more to leave more progeny. Over the generations, the selection pressure would increase the proportion of fishes that are smaller during reproductive age.
PZ120 is not considered to be an enhancer to transcription in the metallothionein 2a gene.
<h3>About metallothionein 2A.</h3>
Metallothionein-2 is a metallothionein protein that in humans is encoded by the MT2A gene.
In human it is expressed in;
- right lobe of liver
- olfactory bulb
- left uterine tube
- external globus pallidus
- right lobe of thyroid gland
- upper lobe of left lung
- Region I of hippocampus proper
- right lung
- left lobe of thyroid gland
It's molecular function are;
- Protein ion binding
- Zinc ion binding
- Metal ion binding
It helps in various biological processes;
- response to metal ion
- cellular response to interleukin-3
- cellular response to erythropoietin
- negative regulation of growth
- cellular response to zinc ion
- interferon-gamma-mediated signaling pathway
- cellular copper ion homeostasis
- cellular zinc ion homeostasis
- detoxification of copper ion
- cellular response to cadmium ion
- cellular response to copper ion
- nitric oxide mediated signal transduction
- response to bacterium
To learn more about Metallothionein 2a,
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Answer:
us humans need a balanced ecosystem because its what keeps us alive. when having a balanced ecosystem we have cleaned water, purified air, maintained soil, regulates our climate, recycles nutrients, and provides us with food.
