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Mars2501 [29]
4 years ago
14

You are given an earthworm and you are asked to study the internal structure of the earthworm. Which one of the following will y

ou need to do?
a. Identify the specimen to species using a field guide or dichotomous key
b. Dissect the specimen
c. Conduct external observations of the specimen
d. None of the above
Biology
1 answer:
timama [110]4 years ago
5 0

Answer:

C

Explanation:

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Fishes are poor bioindicators of the environmental health of an aquatic system.
SVETLANKA909090 [29]

Answer:

b. False

Explanation:

Bioindicators are species, species groups or biological communities whose presence, abundance and conditions are biological indicative of a particular environmental condition. Bioindicators are important to correlate with a particular anthropogenic factor or a potentially impacting natural factor, representing an important tool in assessing the ecological integrity (health status of an area, defined by comparing the structure and function of a biological community between a impacted area and reference areas).

Contamination of aquatic environments and water for public use becomes a growing problem as human population growth expands, as does the demand for sufficient and quality water. Fish are very sensitive to contamination of aquatic environments and are therefore strong bioindicators of the environmental health of an aquatic system.

8 0
3 years ago
In sexual fertilization, what is responsible for the genetic composition of the offspring?
ale4655 [162]
The answer is B because each parent gives half of the genetic information
7 0
3 years ago
Scientists group organisms into three domains: Archaea, Bacteria, and Eukarya. In which domain are animals classified and why?
Sever21 [200]
Eukarya. This is because their cells all have a nucleus. While prokaryotes like archaea and bacteria don't have one, eukarya have a nucleus.
8 0
3 years ago
Which statement best illustrates a biotic or an abiotic factor that is often found in a city park?
ddd [48]

Answer:

Biotic: Plants

Abotic: Rocks

Explanation:

A biotic factor is something in an ecosystem or environment that is living. Some examples that could be found in a park are grass, flowers, trees, squirrels, pigeons, fish or people.

An abiotic factor is the exact opposite of a biotic factor: something in an ecosystem or environment that is not alive. Some examples that may be found in a city park include a park bench, a trash can, rocks, a playground, a pool, basketball court, temperature, and humidity.

5 0
3 years ago
huntington disease is a dominant disease caused by expansion of the trinucleotide repeat region of the htt gene that results in
Travka [436]

By haphazardly introducing a transgene harboring a disease-causing mutant variant of the HTT gene into the genome of a mouse or primate, it is possible to produce an animal model with the majority of the symptoms of this condition. Here option B is the correct answer.

Huntington's disease is an uncommon, genetic condition that results in the gradual degeneration of brain nerve cells. Huntington's illness, which frequently results in mobility, cognitive, and psychological problems, has a substantial impact on a person's functional capacities.

A DNA region known as a CAG trinucleotide repeat is involved in the HTT mutation that causes Huntington's disease. Three DNA-building building pieces that are repeated several times in a row make up this region.

Complete question:

Huntington's disease is a dominant disease caused by the expansion of the trinucleotide repeat region of the Htt gene that results in the production of a Huntingtin protein with an expanded number of glutamines. An animal model with most features of this syndrome could be created by

A - knocking in a wild-type copy of the Htt gene to a mouse or primate genome.

B - randomly inserting a transgene containing a wild-type allele of the Htt gene to a mouse or primate genome.

C - randomly inserting a transgene containing a disease-causing mutant allele of the Htt gene into a mouse or primate genome

D - knocking out one copy of the wild-type Htt gene from a mouse or primate genome.

E - knocking out both copies of the wild-type Htt gene from a mouse or primate genome.

To learn more about Huntington's disease

brainly.com/question/12572808

#SPJ4

3 0
2 years ago
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