The digestive organs are an example of an organ system in biology, where different organs work together to carry out a similar function.
The digestive organs are an example of an organ system in biology. An organ system is a group of organs that work together to perform a specific function. In the case of the digestive system, it includes organs such as the mouth, esophagus, stomach, small intestine, large intestine, and liver.
Each organ in the digestive system has a specific role in the overall process of digestion. For example, the mouth is responsible for chewing and starting the breakdown of food, while the stomach performs the chemical digestion of proteins. The small intestine is where most of the nutrient absorption takes place, and the large intestine is involved in reabsorbing water and forming feces.
All of these organs work together in a coordinated manner to ensure that food is properly digested and nutrients are absorbed. This is an essential process for obtaining energy and nutrients from food.
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b. 1.00 g/cm3
c. 11.4 g/cm3
d. 19.3 g/cm3
Answer: /;
Explanation:
The last universal common ancestor (LUCA) is the most recent organism from which all organisms on Earth descended. While it is challenging to definitively determine the specific characteristics of LUCA, scientists have proposed certain properties that it likely possessed based on evolutionary and genetic evidence. Let's analyze each property mentioned in the question:
1. Simple cellular structure:
- LUCA is believed to have had a simple cellular structure. This means it likely had basic cellular components, such as a cell membrane, cytoplasm, and possibly some form of genetic material.
2. Anaerobic metabolism:
- LUCA is thought to have relied on anaerobic metabolism, which means it obtained energy from sources other than oxygen. This is because molecular oxygen was not abundant in the early Earth's atmosphere when LUCA is believed to have existed.
3. Prokaryotic cell type:
- It is widely accepted that LUCA was a prokaryote, meaning it had cells lacking a nucleus or other membrane-bound organelles. Prokaryotes are considered the most ancient type of cells on Earth.
4. Extremophile characteristics:
- While it is difficult to determine the specific environmental conditions in which LUCA lived, some scientists propose that it could have been an extremophile, capable of surviving in extreme environments like high temperatures, high salinity, or acidic conditions. However, this is still a topic of scientific debate and further research is needed.
5. Heterotrophic nutritional strategy:
- LUCA is believed to have been heterotrophic, meaning it obtained nutrients by consuming organic compounds produced by other organisms. This is in contrast to autotrophs, which can produce their own food through processes like photosynthesis.
In conclusion, based on current scientific understanding, LUCA is likely to have possessed the properties of a simple cellular structure, anaerobic metabolism, prokaryotic cell type, and a heterotrophic nutritional strategy. The presence of extremophile characteristics is still a subject of ongoing research and scientific investigation.
I hope this explanation clarifies the properties that LUCA is believed to have had. Let me know if you have any further questions.
b. False
Answer:
The given statement is False.
Predator-prey relationship is a biological relationship in which one organism kills and eat the other organism in an ecosystem. The organism who killed is termed as predator and the organism who is killed is termed as prey.
It helps in controlling the population size of prey, helps in slowing down the spread of the disease, and in the establishment of a healthier prey population by removing or killing the injured or sick animals.
Complete removal of the predators will lead to the overpopulation of their prey which is generally herbivores. The over-populated herds will eat more and more grass which will ultimately lead to the shortage of food.
So, the herds will starve to death.
Hence, we can conclude that the removal of predator has negative impacts on that predator’s prey species.
Answer:
False
Explanation:
Answer:
The answer is Predator.
Explanation:
b. liverworts.
c. pine trees.
d. horsetails.
Answer:
AA, AB, AA, AB
Explanation:
this is the punnet square (i believe it is called). that's how i did it.