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Basile [38]
3 years ago
10

Which of the following characteristics does an arthropod have?

Biology
1 answer:
Natalija [7]3 years ago
6 0

-Presence of jointed appendages and gills, lungs, jaws.
-Presence of a chitinous external skeleton or exoskeleton that change periodically.
-Body constituted by repetitive segments, phenomenon known as metamerism<span>.</span>

<span>I hope this help,</span>

<span>                       Sebastian Goicoechea.</span>

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All of the following are problems caused by burning coal, except
yan [13]

Answer:

D)radioactive waste is produced

Explanation:

Radioactive waste is a dangerous waste material which contains radioactive substances that are bad for health. These waste are produced in the nuclear reactor for the production of electric energy. Radioactive substances cause many diseases in human such as burning of skin and cancer. It is a non-biodegradable substance which remains in the soil for long periods of time and emit alpha, beta and gamma radiations.

5 0
3 years ago
Drag the labels from the left to the correct locations in the table to contrast r- and K-selection.
Mandarinka [93]
I don’t see any labels, but remember that humans are a great example of a k-selected species. High rates of parental care leads to high survivorship of offspring, and thus negates the need to have large amounts of offspring.

R-selected species are quite the opposite. They produce large amounts of offspring at many intervals in an attempt to maximize survivorship, as they don’t have strong parental involvement with their young. Think of insects.
7 0
3 years ago
_______provides information on the structure of a purified protein based on its nuclear spin properties in a magnetic field, whe
NemiM [27]

Nuclear magnetic resonance provide information on the structure of a purified protein based on its nuclear spin properties in a magnetic field, whereas X-Ray crystallography uses diffraction pattern of protein in solid phase.

Explanation:

Nuclear magnetic resonance is a spectroscopic technique that involves change in nuclear spin energy in presence of an external magnetic field. It is based on the absorption of electromagnetic radiation in the radio-frequency region.

X-Ray crystallography is a method of determining the arrangement of atoms within a crystal.This technique is based the fact that when a beam of X-ray strikes a crystal, the beam gets diffracted. From the angle and intensities of diffraction a three-dimensional structure of electron density can be determined .

3 0
3 years ago
Individuals with a genetic defect in phenylalanine hydroxylase require an additional amino acid in their diet which is not an es
Daniel [21]

Answer:

Tyrosine.

Explanation:

Tyrosine is a non-essential amino acid, it is part of proteins and is considered an aromatic amino acid. Its synthesis occurs from the hydroxylation of phenylalanine as long as it contains an adequate supply of this amino acid.Phenylketonuria is a hereditary disease whose main treatment is dietary restriction of the amino acid phenylalanine. People with phenylketonuria may have low levels of the amino acid tyrosine in their blood.Phenylalanine hydroxylase is an enzyme that converts phenylalanine to tyrosine. Deficiency of the enzyme phenylalanine hydroxylase is a congenital error of metabolism.

6 0
2 years ago
Name the activity that takes place in each parts of the digestive system
Zina [86]

Answer:

Mouth: Mechanical digestion

Small Intestine: Chemical digestion

large Intestine: Absorption

Rectum: Egestion or collection of faeces

Stomach: Mechanical AND chemical digestion

Esophagus: Peristalsis

Explanation:

please mark brainliest ❤

8 0
2 years ago
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