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Natasha_Volkova [10]
3 years ago
15

marine mammals, which are air breathers, can swim for hours at the surface of the water with minimal negative affect. If they di

ve deeper in the water for periods of time they are lost likley in pain. Explain why there would be such a difference?
Biology
1 answer:
Nikolay [14]3 years ago
4 0
The difference at a deeper depth would be water pressure crushing down on them
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Question 2
Lana71 [14]
Hierarchy - I don’t think I have the full context of the question but the word fits the best of its biology related
5 0
2 years ago
What are the components of animal cell
Phoenix [80]
<span>The components of animal cells are centrioles, cilia and flagella, endoplasmic reticulum, golgi apparatus, lysosomes, microfilaments, microtubules, mitochondria, nucleus, peroxisomes, plasma membrane and ribosomes. Lol I hope this is what you were looking for!</span>
7 0
3 years ago
Investigator Benton uses several methods to analyze hair samples found at the crime scene. He examines the physical features of
Diano4ka-milaya [45]

Answer:

Medulla.

By analyzing the DNA extracted from the hair follicle, the medullary index and the pattern of medulla in the hair samples obtained from a crime scene, an investigator can identify the owner.

Explanation:

The hair consists of follicle and shaft. The follicle is the part of the skin, where the hair grows and the hair shaft has three layers: an inner medulla,  a cortex, and an outer cuticle.

The morphology (physical characteristics) of hair provides a broad detail on the racial background of  an individual and an investigator can identify a  group of people who share similar  traits. But the hair without follicle cells attached to it, cannot  be used to identify a specific individual. If the follicle of a hair is present, then it can lead to individual identification by DNA analysis. Also the medulla of animals is larger than that in the humans. By comparing the medullary index (the ratio of the diameter of the medulla to the diameter of the entire  hair), it can be determined if the hair obtained from crime scene belongs to animals or humans. The macroscopic (length, color, and curliness) and  microscopic characteristics ( pattern of the medulla, pigmentation of  the cortex, and types of scales on the cuticle) of the hair samples are studied during a crime investigation. If the entire hair follicle (follicular tag) is present in the hair samples found at the crime scene, the blood and tissue attached to  the follicle is extracted and analyzed using DNA profiling. DNA analysis of the hair follicle provides  an identification with greater accuracy than the hair shaft.

6 0
3 years ago
Koalas are marsupials that are found in eastern Australia. Although their ancestors lived mostly on the ground,
Andrew [12]

Answer:

Fur color that closely matches the eucalyptus bark color

Explanation:

In terms of evolving from land dwellers to tree dwellers, the number of offspring does not matter. Although the ability to run faster is a good evolution for escaping predators, it does not help the koalas evolve to be better tree dwellers (how would you run using only the trees?). Communicating with their peers would be convenient for survival, but it does not help koalas become better tree dwellers. What does help koalas survive better by traveling through the trees is camouflaging with the bark of the tree to hide from predators.

3 0
3 years ago
Why is carbon so important for living things
Blizzard [7]

Answer:

Organic compounds make up the cells and other structures of organisms and carry out life processes. Carbon is the main element in organic compounds, so carbon is essential to life on Earth. Without carbon, life as we know it could not exist.

Explanation:

8 0
3 years ago
Read 2 more answers
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