Answer:
-documenting species.
Explanation:
In mid 19th century, the main concern of marine scientists was the collection description, and cataloging of marine organisms.
Scientists used different methods in the collection of specimen
This were:
- Marine biologists adapted traditional dredges and trawls to collect specimens from the ocean floor.
- Hoop nets were used to secure free-swimming animals.
- New instruments for collecting water samples and obtaining.
- Temperature information at any desired depth were also developed.
In the late 19th century, the focus of marine scientists began to shift from collecting and cataloging to systematic analysis of marine ecosystems and the ecological roles and behavior of marine life.
Answer: The mutation is substitution.
Explanation:
There are three main types of mutation:
Substitution, deletion, and insertion.
We would be able to tell right away if the second sequence had an insertion or deletion, because it would have a different number of letters than first sequence. However, it does not. Both sequences have 12 letters.
But, the 8th letter in the first sequence (T) is different from the 8th letter in the second sequence (A).
This is substitution.
Fungi contains afilaments called hyphae, which are made up strings of cells and which are separated from one another by septa or crosswalls.<span>
Many of these hyphae grouped together and they make up mycelium
</span><span> The melanin helps to strengthen the cell wall as well as protect the fungus from sun damage and cell wall give a proper shape to the fungi
</span>hope it helps
<u>Answer:</u>
In ecology, catastrophes permanently alter the physical structure of the existing environment.
<u>Explanation:</u>
- The ecological disturbances include flood, strom, plague, fires, earthquakes, tsunami, volcanic eruptions, climatic change and impact of humans on the environment like deforestation ,nuclear testing etc.
- These factors can have a visible impact on the structure of the earth and permanently alter the environment.
- The visible effects of these disturbances are global warming, extinction of selective species, change in the course of rivers, submergence of coastal areas, sudden movement of the tectonic plates and formation of sudden cracks on the earth's crust.
