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o-na [289]
3 years ago
12

The cuticle, cortex, and medulla are regions of the hair, can you describe how they are arranged?

Biology
1 answer:
Andrei [34K]3 years ago
3 0

Answer:

The cuticle is the hair's protective layer, the cortex forms the pigment of the hair, the health of the cortex depends on the cuticle protecting it while the medulla is the innermost of the hair.

Explanation:

The cuticle is the hair outermost layer, the cortex is the middle structure for strength while medulla is the inner most.

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In the future, phylogenetic studies should be conducted to ________. In the future, phylogenetic studies should be conducted to
Artist 52 [7]

Answer:

a. resolve the branching patterns (evolutionary history) of the Lophotrochozoa

b. (the same, it is repeated)

Explanation:

Nemertios (ribbon worms) and foronids (horseshoe worms) are closely related groups of lofotrocozoa. Lofotrocozoans, or simply trocozoans (= tribomastic celomados with trocophoric larva) are a group of animals that includes annelids, molluscs, endoprocts, brachiopods and other invertebrates. They represent a crucial superphylum for our understanding of the evolution of bilateral symmetry animals. However, given the inconsistency between molecular and morphological data for these groups, their origins were not entirely clear. In the work linked above, the first records of genomes of the Nemertine worm Notospermus geniculatus and the foronid Phoronis australis are presented, along with transcriptomes along the adult bodies. Our phylogenetic analyzes based on the genome place Nemertinos as the sister group of the taxon that contains Phoronidea and Brachiopoda. It is shown that lofotrocozoans share many families of genes with deuterotomes, suggesting that these two groups retain a common genetic repertoire of bilaterals that do not possess ecdisozoans (arthropods, nematodes) or platizoos (platelets, sydermats). Comparative transcriptomics demonstrates that foronid and brachiopod lofophores are similar not only morphologically, but also at the molecular level. Although the lofophore and vertebrates show very different cephalic structures, the lofophorees express the vertebrate head genes and neuronal marker genes. This finding suggests a common origin of the bilaterial pattern of the head, although different types of head will evolve independently in each lineage. In addition, we recorded innate immunity expansions of lineage-specific and toxin-related genes in both lofotrocozoa and deuterostomes. Together, this study reveals a dual nature of lofotrocozoans, in which the conserved and specific characteristics of the lineage shape their evolution.

8 0
3 years ago
Which of the following is an anthropogenic cause of water pollution?
katen-ka-za [31]

Answer:

(C) farming fertilizers washing into lakes

6 0
3 years ago
Using the 10% rule when studying trophic pyramids, if the autotrophs produce 100 Joules of energy, how much energy is passed on
Inessa [10]

Answer:

The answer is B.

Explanation:

It's Because 10% of 100 is 10.

6 0
3 years ago
Read 2 more answers
I’m humans, curly hair (HH) is incompletely dominat to straight hair (H’H’). Cross someone with curly hair & someone with wa
kipiarov [429]

Answer:

D 100%

Explanation

The child still carries the straight hair genes, but they also carry the dominant gene, HH(curly hair) , so that is what hair texture we will see.

hope this helped :)

6 0
3 years ago
Read 2 more answers
What is the kinetic energy of a 155 kg object that is moving with a speed of 18 m/s? With Details.
kherson [118]

Kinetic energy = 1/2 * mass * velocity^2 so Ke = 1/2*(155*10^3 g)*18^2 which is 25,110,000 joules.

4 0
3 years ago
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