BIOLOGY HIGH SCHOOL

Which of the following is not a characteristic of metals?-high luster
-conducts electric current
-forms crystalline solids
-brittle

Answers

Answer 1
Answer:

The right option is; Brittle

Metals are substances or chemical elements that form a metallic bond with other metal atoms. Metals are usually lustrous, ductile, opaque, malleable, and good conductors of heat and electricity. Metals form crystalline solids at room temperature and they are not brittle. Examples of metals include copper, silver, iron, mercury and sodium.
Answer 2
Answer:

Brittle is not a characteristic of the metals.

Further Explanation:

Metals are chemical substances that are inorganic in nature. The most abundant possess are sodium, magnesium, iron, aluminum, and calcium. The copper, platinum, silver, gold not readily react with other elements so they are present in free-state. The characteristics of metal are:

  • High conductivity
  • Malleable
  • Ductile
  • Hard

Metals are mainly crystalline in nature. The crystal structure of metals is very simple with a relatively high degree of symmetry. The metal reacts readily with other non-metal. The reactivity of metals are different from each other, lithium and potassium are highly reactive metal compound. The platinum, palladium, gold, and silver are very low reactive compounds. The metals are usually malleable and ductile in nature that means they can be transformed into wire and sheet. The brittle substances do not possess these characteristics and therefore, brittleness is not a characteristic of metals.

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Answer Details:

Grade: High School

Subject: Biology

Chapter: Metals and Non-metals

Keywords:

Substance, compound, metal, crystalline, gold, potassium, lithium, silver, malleable, brittle, ductile, hard, reactivity, electricity, conductivity.

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A cell is viewed under a microscope and is found to have two nuclear envelopes and spindles that appear to be breaking apart. Which phase of mitosis is the cell most likely in?a. Telophase
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Answers

Mitosis is the process in which cells divide toform new cells. The cell that is being described under the microscope isalready in the Anaphase stage in mitosis.

Anaphase is the process in which two sister chromatids separate and move toopposite poles of the cell. These two sister chromatids contain identicalcopies of DNA that are joined at the middle called centromere. The chromosomesare separated by the mitotic spindle. Towards the end of the anaphase the two sister chromatids now have their twoseparate poles. The mitotic process then proceeds to theTelophase.

Answer:

A : Telophase

Explanation:

the final phase of cell division, between Anaphase and Interphase, in which the Chromatids or chromosomes move to opposite ends of the cell and two nuclei are formed.

According to evolutionary history and taxonomy, tigers resemble ____________ more closely than they resemble fish. A) hydra B) gorillas C) sea urchin D) grasshoppers

Answers

The correct answer is option B, Gorillas

Tiger resembles gorillas as these two animal species are high order vertebrates and live in the same habitat i.e on land. Most of their physical and biological features are same or their functionality concepts are same. While fish are primates of lower order and live in water , thus they posses many distinctive feature which are absent in tigers. Insects are Arthropods and are invertebrates.

I think its B hope it helps

Which of these characteristics is common only at the embryonic stage of fish and humans, and is suggestive of a common ancestor between the two? A) presence of lungs B) presence of a tail C) presence of gill slits Eliminate D) presence of a vertebral column

Answers

The answer is; C

Most often some ancestral characters are preserved in an organism's development hence can be used to study evolutionary relationships. One of these features is the gill slits in embryos. These have been used to postulate that all land organisms, that exhibit gill slits in their embryonic development, emanated from a common fish ancestor. In humans, these gill slits later develop in the pharyngeal.

A technique in which the muscles are stretched by an outside force is called _____.FITT principle
Active stretching
Passive stretching
Pilates

Answers

A technique in which the muscles are stretched by an outside force is called passive stretching.

Answer;

Passive stretching

A technique in which the muscles are stretched by an outside force is called  passive stretching.

Explanation;

There are several type of stretching which includes;

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  • Static stretching is a technique in which a muscle is slowly and gently stretched and then held in the stretched position.

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Answers

they are not good references because they could be names u give a dog like for ex. 

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Answers

The answer is Porifera.

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