1. Trachea itself is not considered a complete organ. It is a part of the breathing system and the only airway to the lungs.
2.Yes rigid organs.
3. Rigid organs constitute part of the endoskeleton of vertebrates.
The question is incomplete as it does not have the options which are:
By binding to a plasma membrane receptor it initiates a cascade.
It relays a signal from the cytoplasm to the plasma membrane.
It activates relay proteins.
By binding to DNA it triggers the transcription of a specific gene.
It is a plasma membrane protein that binds signal molecules.
Answer:
By binding to DNA it triggers the transcription of a specific gene
Explanation:
The transcription factors are the protein molecules that bind with a specific sequence of the DNA. These transcription factors after binding to DNA initiates the process of transcription thus act in gene expression.
The transcription factors are involved in the long transduction pathway which has to act on the DNA sequence and produce the enzymes like involved in the synthesis of steroid hormones in the body.
Thus, the selected option is correct.
Answer:
Mitochondria: makes ATP
Rough ER: Modifies proteins
Smooth ER: Makes lipids
Golgi Apparatus: Packages and distributes proteins
Lysosome: Digests molecules
I believe this is correct. I took biology last year.
Animals that are preyed upon likely have a higher death rate than their natural predators. So, to make up for the population decrease, they produce more offspring to ensure the survival of the species. Hope this helps :)