BIOLOGY HIGH SCHOOL

Which of the following describes light as a wave?Light is a transverse wave.

Light is a wave but does not have frequency as a property.


Light is exactly similar to water and sound.

Light is a converse wave.

Answers

Answer 1
Answer: Light is a transverse wave and this is what describes light as a wave. The correct option among all the options that are given in the question is the first option. Light is not at all similar to water and sound. It would be a big mistake to consider light as similar to the mediums water and sound. I hope the answer helps.
Answer 2
Answer:

Answer:

Light is a transverse wave.

Explanation:

Light is a transverse wave. Its particles vibrates or oscillates in the direction perpendicular to the direction of propagation of wave.

Light wave also have both electric and magnetic field component. So, light waves are also called as electromagnetic wave. Another type of wave is longitudinal wave. In this type, the particles of wave are in the direction of propagation of wave.

Hence, the correct option is " light is a transverse wave ".

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How did the use of groundwater change from preindustrial times to industrial times?a.
Groundwater use decreased from preindustrial times to industrial times.
b.
Groundwater use increased from preindustrial times to industrial times.
c.
Groundwater use remained virtually the same from preindustrial to industrial times.
d.
Groundwater was not used during preindustrial times.

Answers

The correct option is B.

Ground water refers to those water sources that are found underneath the ground in rocks, sand and soils. The quantity of ground water that were utilized during the pre-industrial period is very small compare to the amount that is utilized during the industrial time. And this has led to a significant decrease in the amount of ground water available today. Other factors that had led to shortage in ground water include pollution and lack of precipitation.

Due to the invention of drilling tools, groundwater use increased from preindustrial times to industrial times.

What is groundwater?

Ground water refers to water that is found underground in between layers of rocks.

In the preindustrial times, most water used was surface water. However, during the industrial times with the invention of equipments that could drill deep underground, the use of ground water increased.

Therefore, groundwater use increased from preindustrial times to industrial times.

Learn more about groundwater at: brainly.com/question/9617

Cleansing the venipuncture site before collection of blood culture specimens usually involves the use of: isopropyl alcohol and peroxide ethyl alcohol and peroxide isopropyl alcohol and chlorhexidine gluconate ethyl alcohol and chlorophenol

Answers

Answer:

C) isopropyl alcohol and chlorhexidine gluconate

Explanation:

The World Health Organization (WHO) guidelines mandate that the venipuncture site be cleaned with an alcohol swab of 70 percent alcohol.

Document H3-A6 is also recommended by the Clinical and Laboratory Standards Institute (CLSI) that skin disinfection with 70% isopropyl alcohol or ethanol is required before venipuncturing tosterile the skin surface. chlorhexidine gluconate  is a good repacment of isopropyl alcohol, hence used at venipuncture site.

Hence, the correct option is C.

How are cis-trans isomers used for night vision?

Answers

Answer: 11-cis Retinal is the light-sensitive component of rod and cone photoreceptors, and this structural conformation in rod photoreceptors is vital for low-light vision (night vision)

Explanation: To detect light, photoreceptors (especially rods) employ the exceptional properties of 11-cis retinal. Rods transmits low-light vision, as only them have enough sensitivity to respond and to trigger vision .

11-cis retinal in rods are bound to an opsin signaling protein to form a visual pigment molecule. Its other isomer, the all trans retinal is isomerized to 11-cis retinal causing the branching of the polyene chain, deactivating opsin molecule and increasing sensitivity to light. This adaptation occurs rapidly in minutes in the dark, resulting in maximum sensitivity to light.

"Cis-Trans Isomerism in Vision 
The retina, the light-detector layer in the back of our eyes, contains colored compounds called visual pigments. They are insoluble in water and can be extracted from the retina with aqueous detergents. In the dark these pigments are reddish (their name, rhodopsin, comes from a Greek word meaning rose-colored), but the color fades upon exposure to light. 

Rhodopsin molecules contain a protein called opsin plus a derivative of vitamin A called 11-cis-retinal. In the dark, 11-cis-retinal fits nicely into the folds of the surrounding opsin. When light hits the rhodopsin, the 11-cis-retinal becomes all-trans-retinal and no longer fits into the cavity of opsin. The opsin and the all-trans-retinal separate. The change in rhodopsin conformation is eventually transmitted to the nerve cells in the eye and then the brain. The stereoisomerism of retinal is thus an important part of the vision process. Note that only one of the five double bonds is affected in this transformation, but when this one changes from cis to trans, the shape of the entire molecule changes. An enzyme later catalyzes the change of all-trans-retinal back to 11-cis-retinal so that it can once again bind opsin and wait for the next exposure to light. 

The retinas of vertebrates have two kinds of cells that contain rhodopsin. These cells are distinguished by their shapes: rods and cones. The cones, which function in bright light and are used in color vision, are concentrated in the central portion of the retina, called the macula, and are responsible for the greatest visual acuity. The remaining area of the retina consists mostly of rods, which are used for peripheral and night vision. 11-cis-retinal is present in both rods and cones. However, the opsin is somewhat different in the two kinds of cells, and the cones have three different opsins, one kind each for perception of blue, green, and red colors." 

A zoology student is investigating whether it is true that the gender of turtles depends on the temperature at which the turtle eggs are kept before they hatch. He will test if turtle eggs incubated at 29–30 degrees Celsius produce females, and eggs at 24–26 degrees Celsius produce males. What is the independent variable?

Answers

The independent variable is the temperature. Independent variable refers to the  variable in an experiment that can be changed by the scientists or the one making the experiment. A good experiments has a single independent variable and the changes observed will be the dependent variable. In this case, the dependent variable is the gender of the turtle.

Answer:

D. temperature

Explanation:

i got it right

Includes parenchyma, collenchyma, and sclerenchyma

Answers

The answer is ground tissue.

Plants have 3 types of tissues - dermal, vascular, and ground tissue. Ground tissue includes parenchyma, collenchyma, and sclerenchyma. 
Parenchyma has a role in photosynthesis, storage. It also makes the bulk of ground and vascular tissue.

The function of sclerenchyma and parenchyma is support and strength of roots, stems, and leaves.

Which of the following describes why wetlands are important to the water cycle?

Answers

Wetlands Water Cycle describes and talks about how water can go from a solid, liquid, and gas. It helps our rivers run, lakes to stay full, and supplies our homes with water. Without the Water Cycle our water supply would be in trouble. 
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