Why do classification systems change over time?
O Scientists find new evidence in their studies.
O Scientists use old methods of classification.
O Scientists repeat experiments and find no changes.
O Scientists find similar evidence to previous work.

Classification systems change over time because scientists find new evidence in their studies. So, the correct option is (A).

There are many types of classification systems that are used for different purposes. The classification of organisms takes place in the form of a classification system called Linnaean classification.

Linnaean classification involves the use of organisms grouped using a hierarchy called taxa which includes taxonomic levels and taxonomic groups that animals are placed in based on their characteristics and even shared ancestry.

The different levels of biological classification are as follows:

Species » Genus » Family » Order » Class » Phylum » Kingdom » Domain

It changes over time as scientific studies find new evidence.

Thus, classification systems change over time because scientists find new evidence in their studies. So, the correct option is (A).

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Cuando se excita una neurona con estímulos de intensidad creciente se obtiene, a partir del umbral, la misma respuesta eléctrica. En esta situación se pone de manifiesto la característica de: *
A) ley del todo o nada.
B) período refractario relativo.
C) período refractario absoluto.
D) excitabilidad.
E) umbral de excitación.

1. In 1970, the U.S. Congress established The Environmental Protection Agency (EPA) to oversee all of the following, EXCEPT: *

A.pollution problems
B.building new nuclear power plants
C.establish new environmental policies
D.research solutions to environmental issues

Como se chama a transferencia de enrgia termica flui de um corpo com maior temperatura quando ao outro de menor temperatura quando ha diferença de temperatura entre ambos

how the animals and plants of a healthy ecosystem are organized and interact.

What is the purpose of the digestive system?

1. Create energy
2. Swallow food
3. Break down food so nutrients can be absorbed

Plz help fast will give 5 star

Phototropism is a phenomenon observed in plants. Phototropism is best described as a plant’s response to light. Auxin is a hormone and signaling molecule found in plants that promotes cell elongation. It is observed that auxin concentrations are lower in the parts of the plant that are closest to light. Auxin concentrations are higher in the parts of a plant that are in the shade.

Answer the following in the space provided.
A. Describe phototropism using what you know about signal transduction. Start with auxin as a signaling molecule.
B. Explain how altering the receptor would affect the signaling pathway.
C. Predict how a plant would respond to exposure to light on all sides of a growing stem.
D. Provide reasoning and justification for your prediction.

(Free Response) Phototropism is a phenomenon observed in plants. Phototropism is best described as a plant’s response to light. Auxin is a hormone and signaling molecule found in plants that promotes cell elongation. It is observed that auxin concentrations are lower in the parts of the plant that are closest to light. Auxin concentrations are higher in the parts of a plant that are in the shade.
Answer the following in the space provided.
A. Describe phototropism using what you know about signal transduction. Start with auxin as a signaling molecule.
B. Explain how altering the receptor would affect the signaling pathway.
C. Predict how a plant would respond to exposure to light on all sides of a growing stem.
D. Provide reasoning and justification for your prediction.

The female gametes are called__________. *

sperm
ova

Describe the scales that scientists use to measure the magnitude of an earthquake

How are glaciations related to Earth's position in a Milankovitch cycle​

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Biology - Genetics
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The majority of a cell's life is in this phase.
A. centromere
B. interphase
C. cytokinesis
D. prophase

A third-level consumer must be which type?
Carnivore
Herbivore
Producer
Decomposer

The phosphorus cycle is the biogeochemical cycle that describes the movement of phosphorus through the
lithosphere, hydrosphere, and biosphere. Order the steps above into a logical sequence that might represent steps in
the phosphorus cycle.
A)
111, 111, IV, V, VI.
B)
1. II. IV. IIIVVI
C)
IV. HII VIIVI
D)
II IV V VI

A man is HH for a trait, while his wife is hh. What will their children

which is the method of estimating fish in a pond​

Which of the following is one way that humans can protect biodiversity?

Which of the following statements about water is NOT true?
A. It helps to maintain a normal body temperature.
B. It is a good source of energy.
C. It carries substances throughout the body in the bloodstream.
D. It is needed for all chemical reactions to occur.

Mendel based his conclusions on his understanding of meiosis.
a. FALSE
b. TRUE

why is carbon dioxide required for photosynthesis

All of the following are major glands of the endocrine system expect

A 38-year-old mother of three presents to her primary care office with complaints of fatigue. She feels that her energy level has been low for the past 3 months. She was previously healthy and taking no medications. She does report that she has gained about 10 lb and has severe constipation, for which she has been taking a number of laxatives. A TSH is elevated at 25 mU/L. Free T4 is low. She is wondering why she has hypothyroidism. Which of the following tests is most likely to diagnose the etiology?
A. Antithyroid peroxidase antibody
B. Antithyroglobulin antibody
C. Radioiodine uptake scan
D. Serum thyroglobulin level
E. Thyroid ultrasound

True or false The sea otter is considered a keystone species that influences the survival of many other species in an ecosystem .

For recessive trait to be expressed you need to receive the allele from both parents. True or false

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What Are Alleles? Where Do alleles come from?​

Organisms of either extreme characteristic dying out while organisms with the medium characteristic have a higher fitness is identified as?

If fertilization occurs which hormone triggers the thickening of the endometrium
a.estrogen
b.progesterone