Answer:
Because once they were very common they disappeared after the mass extinction event. ... Many geologic periods were defined by events that made natural boundary to the period.
Answer: <u>Fungi
</u>
Explanation:
Organisms with the capacity to breathe anaerobically and aerobically are typically called obligate anaerobes. Obligate anaerobes are usually microorganisms- microscopic organisms.
Since the organism described is land-dwelling, chitinous and eukaryotic (containing a plasma membrane enveloped nucleus), they are most likely fungi. Chitin is a rigid, non-soluble carbohydrate utilized for structural purposes. Typically these organisms have strong, insoluble cell walls, are multi-cellular and can form filamentous networks of hyphae.
They create a tangled network of mycelia and may be:
- Septate, with walls between every cell or
- Aseptate without walls
A cell wall
Plant cells have features that animal cells do not have - a cell wall, also they have a large central vacuole, and plastids such as chloroplasts.
hope it helps -Noelle
Chemical composition is always a property of an ore.
Answer:
The flow chart for the cortisol steroid hormone is as follows:
1. Cortisol passes through the plasma membrane into the cytoplasm.
2. Cortisol receptor complex form in the cytoplasm.
3. Cortisol receptor complex enter the nucleus where it binds to gene.
4. Cortisol receptor complex acts as transcription factor.
5. The tranacribed mRNA is translated into specific protein.
Explanation:
Cortisol is small which is hydrophobic steroid hormone which has the ability to move through the plasma membrane of the cells. In the target cells the cortisol binds with the intracellular receptor protein of the cytoplasm which further forms a hormone receptor complex. The hormone receptor complex further moves into the nucleus ad hence acts as a transcription factor which gets bind to the specific gene and thus, activates the transcription into mRNA. The mRNA which is generated subsequently translated into some specific proteins. Proteins which has been produced with response to the cortisol signal function to the stress response.