Please answer this quick I’ll give brainliest
Retina provides a sense of vision.
Select one:
a. False
b. True

Answers

Answer 1
The retina is the back part of the eye that contains the cells that respond to light. These specialized cells are called photoreceptors. ... The rods are most sensitive to light and dark changes, shape and movement and contain only one type of light-sensitive pigment. Rods are not good for color vision. The retina (from Latin: rēte) is the innermost, light-sensitive layer of tissue of the eye of most vertebrates and some molluscs. The optics of the eye create a focused two-dimensional image of the visual world on the retina, which translates that image into electrical neural impulses to the brain to create visual perception. The retina serves a function analogous to that of the film or image sensor in a camera. The neural retina consists of several layers of neurons interconnected by synapses and is supported by an outer layer of pigmented epithelial cells. The primary light-sensing cells in the retina are the photoreceptor cells, which are of two types: rods and cones. Rods function mainly in dim light and provide black-and-white vision. Cones function in well-lit conditions and are responsible for the perception of colour, as well as high-acuity vision used for tasks such as reading. A third type of light-sensing cell, the photosensitive ganglion cell, is important for entrainment of circadian rhythms and reflexive responses such as the pupillary light reflex.

Light striking the retina initiates a cascade of chemical and electrical events that ultimately trigger nerve impulses that are sent to various visual centres of the brain through the fibres of the optic nerve. Neural signals from the rods and cones undergo processing by other neurons, whose output takes the form of action potentials in retinal ganglion cells whose axons form the optic nerve.[1] Several important features of visual perception can be traced to the retinal encoding and processing of light.

In vertebrate embryonic development, the retina and the optic nerve originate as outgrowths of the developing brain, specifically the embryonic diencephalon; thus, the retina is considered part of the central nervous system (CNS) and is actually brain tissue. It is the only part of the CNS that can be visualized non-invasively. Ever since you were little, you’ve been hearing lots of hearsay about your eyes and how to keep them healthy. Are carrots really good for your eyes, and will they help you see in the dark? Will reading fine print at night make your eyesight go bad? While many of these are based in fact, they aren’t entirely true. Let’s try to sort the fact from the fiction.

Damage Versus Fatigue

Many of these eye myths involve the threat of damage to your eyes. You may have heard that reading in dim. The retina is an essential part of the eye that enables vision. It's a thin layer of tissue that covers approximately 65 percent of the back of the eye, near the optic nerve. Its job is to receive light from the lens, convert it to neural signals and transmit them to the brain for visual recognition.

Related Questions

In the chemical equation for photosynthesis, carbon dioxide and water are converted to glucose and oxygen.

6CO2 + 6H2O ® C6H12O6 + 6O2

Which component could be added to complete this chemical equation?
light energy
ATP and NADPH
chemical energy
rubisco

Answers

6CO2 + 6H20 + Light Energy >>> C6H12O6 + 6O2
Glucose is produced by chemically combining carbon dioxide sand water with sunlight.

Answer:

A.) Light energy

Explanation

just trust

Which process is the most efficient in yielding atp molecules?

Answers

Aerobic respiration

A wooden block slides down a ramp that is 8 meters long in 2 seconds. What was the average speed of the wooden block?
A. 8 m/s
B. 4 m/s
C. 16 m/s
D. 10 m/s

Answers

Answer:

4 m/s.

Explanation:

Speed = distance/time

why genetically modified crop is over advantages thanbreeding

define please

Answers

Answer:

Genetically Modified (GM) crops

Explanation:

Why Genetically modified crops are more beneficial?

Genetic engineering provides a quicker and more precise way to achieve the same goal, in one generation rather than twenty. Genetically Modified (GM) crops offer improved yields, enhanced nutritional value, longer shelf life, and resistance to drought, frost, or insect pests.

Which of the following scenarios can be classified as a positive feedback loop?
1.increase in blood pressure to reduce the heart rate
2.increase in red blood cell production due to low oxygen levels
3.sweating to cool down skin cells
4.increased platelet production to help blood clotting

Answers

Answer:

D

Explanation:

In order to prevent blood loss, the body needs a mechanism that amplifies the action that leads to clotting in a short period of time. This cascade or enhancement of a process is a positive feedback mechanism.

GIZMOS student exploration:iconic bonds....Does anyone have the answer sheet?

Answers

You can search that up on google, but most of the answers should be on the gizmo website thing!

Fasttttttttttttttttttttttttttttttt 15 points

Answers

The answer would be C.
Explanation: since sound is a mechanical wave it can not travel through vacuums.
C is the correct answer

What is the percentage of Thymine if you have 18 % Guanine in a strand of DNA?

32
25
22
18

Answers

Answer: 32%

Explanation: Remember the base pairing rules: cytosine with guanine and adenine with thymine, in equal amounts. That being said, the amount of cytosine is equal to the amount of guanine, meaning that it is 18% as well. Since 18+18=36, you know that the remaining 64% is adenine and thymine collectively. To figure out how much of each base there is, you could divide 64% between each nitrogenous base to get 32% each.

Hope this helps,

Lacia :)

In a recent experiment, anti-bacterial hand sanitizer was compared to hand soap. Students washed their hands using the sanitizer or soap and warm water for two minutes; then they dried their hands with a paper towel. The standard of comparison was rubbing hands vigorously for 2 minutes in warm water, without any soap or sanitizer, and then drying with a paper towel. The sanitizer advertisement claimed to kill bacteria more effectively than any soap. After washing, hands were swabbed and then the swab applied to a culture plate and incubated. Finally, the bacterial cultures were counted. Students using the antibacterial santizer had the lowest bacterial culture count. What is the control in the experiment? A) washing with soap B) rubbing vigorously C) the time: two minutes D) rubbing hands in warm water

Answers

Answer:

The correct answer is - option D. rubbing hands in warm water.

Explanation:

The control group or the control is the variable or that is used in an experiment to check if the results are actually due to the experiment or to compare the result or effect of the experiment.

In this experiment, the independent variables are soap and the sanitizer and the dependent variable is the count of bacterial culture. To check the result or to compare the result that results are due to the experiment the control group is rubbing the hand vigorously in warm water.

what is the difference between a mollusk and an annelid?​

Answers

Answer:

Segmented worms vs invertebrates

Explanation:

Mollusks are invertebrates such as snails, scallops, and squids. Different classes of mollusks have different ways of obtaining food. Annelids are segmented worms such as earthworms and leeches. Annelids have a coelom, closed circulatory system, excretory system, and complete digestive system.

Which of the following adaptations is characteristic of animals in the alpine biome?
a.
seasonal color change
b.
insulating feathers
c.
large paws
d.
large lungs

Answers

Answer:

Answer Is D :)

Explanation:

Answer:

D. Large Lungs

Explanation:

Two students are eating lunch. One student tells the other who is eating a peanut butter and jelly sandwich, "All the energy stored in that sandwich came from plants harnessing the power of the sun as chemical energy!" Is this statement true or false?

Answers

Answer:

its true

Explanation:

thats what photosynthesis is-

Answer:

Very much True.

Explanation:

Most everything we eat comes from the trees and plants that let us breath. Wheat Bread or bread in general? Wonder how they make that. Wheat of course! Wheat also happens to be a plant, and even though it doesn't look like your normal plant. It still has the same process of photosynthesis. Thus, harnessing energy from the sun for food.

What is the role of the carbon cycle? (100 points) Detailed answers please!

Answers

Answer:When new life is formed, carbon forms key molecules like protein and DNA. It's also found in our atmosphere in the form of carbon dioxide or CO2. The carbon cycle is nature's way of reusing carbon atoms, which travel from the atmosphere into organisms in the Earth and then back into the atmosphere over and over again.

Explanation:

Answer:

the carbon cycle is the process in which co2 i

travels from the atmosphere to organisms and back to the atmosphere. The four steps of the carbon cycle are photosynthesis, decomposition, respiration, and combustion. Then carbon cycle starts by carbon moving from the atmosphere to plants. The carbon then moves from plants to animals. And then it moves from plants and animals to soil. The carbon then moves from living things back to the atmosphere. Carbon also moves to the atmosphere from the burning of fossil fuels. carbon also moves from the atmosphere to the oceans. Carbon is a life sustaining element . The carbon cycle is important because it move carbon throughout different ecosystems.

Which claim has the highest degree of objectivity?
O A scientist working for a real estate company wrote an article stating that the air quality in that town was the best
in the state.
O A research team working at a university wrote an article stating that multiple experiments have shown that marine
ecosystems are sensitive to water pollution
O A research team working for a bread company wrote an article stating that their company's bread is healthier
than the competitor's bread.
O A doctor who appears in commercials for a specific medicine wrote an article stating that many people could
benefit from taking that medicine.

Answers

Answer:

A research team working at a university wrote an article stating that multiple experiments have shown that marine ecosystems are sensitive to water pollution.

Explanation:

Answer:

B. A research team working at a university wrote an article stating that multiple experiments have shown that marine ecosystems are sensitive to water pollution.

Explanation: Got this right on edge ;)

my teacher gave me the wrong test but i still wanna know the answer to this question

Answers

50% is the answer!.!$!

[GIVING BRANLIEST]


If a DNA strand has 26% cytosine, what percent thymine will each new strand have after replication?

Answers

Answer: Each new strand would have 24% thymine

Remember the base pairing rules: cytosine with guanine and adenine with thymine, in equal amounts. Since you know that there is 26% cytosine, the amount of guanine is also 26%. 26+26=52, so that means that 52% is cytosine and guanine collectively, which means that the remaining 48% is adenine and thymine. Since these are also equal, you could divide 48% between the two bases to get 24% each.

Hope this helps,

Lacia

A city is considering switching to geothermal power for their electricity needs. Which of the following is an advantage of this plan?

1. It is commonly used across the entire United States.

2.It uses less land area than gas power plants.

3.It uses water to power large turbines.

4.It in inexpensive to build.

Answers

It uses water to power large turbines.

Geothermal power taps on the energy of natural steam from the earth's lithosphere.

Explanation:

The heat from deep in the the lithosphere heats up underground water into high-pressure steam trapped in within the rocks. Boreholes are sunk to tap on the potential energy of this high-pressure steam to turn large dynamo turbines that convert the steam energy into electricity.

The biggest advantage, moreover, is the fact that this method of electricity generation does not emit greenhouse emissions as compared to gas plants that burn hydrocarbons that release CO₂.

Un carnera de lana negra se cruza con una oveja de lana blanca y tienen al menos un cordero de lana negra. El canero tiene las orejas largas y la oveja las tiene cortas. Sabiendo que el color de la lana sigue una herencia dominante para el color blanco y que esta especie puede tener las orejas Cortas, medianas o largas (herencia intermedia), deduce qué fenotipos se esperan en la F1 y su proporción. Cuadro de punnett necesito?

Answers

Answer:

Fenotipos de la F1: 50% de la progenie muestra orejas medianas y lana blanca, mientras que el otro 50% muestra orejas medianas y lana negra. En este caso en particular, el cuadro de Punnett no es necesario pero resulta de gran utilidad para visualizar la cruza.

Explanation:

Datos disponibles:

El color de la lana sigue una herencia dominante para el color blancoEsta especie puede tener las orejas cortas, medianas o largasCruza: carnero de lana negra y orejas largas X oveja de lana blanca y orejas cortasProgenie: al menos un ejemplar con lana negra

Podemos suponer que para el gen determinante del color de lana, el alelo dominante L determina lana blanca, mientas que el alelo recesivo l determina lana negra. También podemos suponer que para el gen que determina la longitud de las orejas, el genotipo LL expresa orejas largas, el genotipo Ll expresa orejas medianas, y ll expresa orejas cortas por tratarse de herencia intermedia. Entonces:

B--> Lana Blanca

b --> Lana Negra

LL --> Orejas largas

Ll --> Orejas medianas

ll --> Orejas cortas

Cruza: carnero de lana negra y orejas largas X oveja de lana blanca y orejas cortas

Puesto que en la progenie habia por lo menos un ejemplar con lana de color negro, podemos suponer que la oveja era heterozigota para la caracterítica en cuestión, ya que es la única forma de obtener un genotipo recesivo en la F1.

Parentales)   bb LL           x        Bb ll

Gametos) bL, bL, bL, bL          Bl, bl, Bl, bl

Cuadro de Punnet)   Bl        bl        Bl       bl

                     bL      BbLl     bbLl    BbLl   bbLl

                     bL      BbLl     bbLl    BbLl   bbLl

                     bL      BbLl     bbLl    BbLl   bbLl

                     bL      BbLl     bbLl    BbLl   bbLl

F1) Genotipo: 8/16 BbLl

                      8/16 bbLl

    Fenotipo: 8/16 o 50% animales de lana blanca

                      8/16 o 50% animales de lana negra

                      16/16 o 100% animales de orejas medianas

Posiblemente no sea necesario utilizar un cuadro de Punnet con la cruza mencionada. Sabiendo los genotipos paterno y materno es posible determinar las proporciones fenotipicas de la F1 sin realizar el cuadro de Punnet.

Para longitud de orejas se puede deducir que todos los ejemplares en la F1 serian heterocigotos, expresando orejas medianas. Esto se debe a que la cruza ocurre entre un homocigota dominante y un homocigota recesivo para esta característica.En tanto que para la caracteristica del color de lana se podria asumir que la mitad sería blanca y la otra mitad negra, puesto que la cruza es entre un homocigota recesivo y un heterocigota.

Aun así, mientras haya pocos genes dialélicos involucrados en la cruza, el uso del cuadro de Punnet siempre resulta útil para una mejor visualización de la cruza.

The four main types of macromolecules found in organisms are proteins, lipids, carbohydrates and ____.
a. monosaccharides
b. nucleic acids
c. fatty acids
d. starches

Answers

Answer:

b. nucleic acids

Explanation:

Which cell organelle is responsible for a plant’s shape/structure and can be found in a piece of lumber (tree bark) that was cut from a tree last year?

chloroplast

cell wall

cell membrane

nucleus

Answers

Answer:

nucleus

Explanation:

nucleus is the answer

I really need the answer to both of these and I’ll give brainliest to the first answer

Answers

Answer:

The first one is Carbohydrate and second one is protein

Explanation:

Answer:

the first is carbohydrates and the second one is protein

A clownfish lives in a sea anemone. The anemone is not hurt , but the clownfish can live in its safety. This is an example of what symbiotic relationship?​

Answers

By you description this is commensalism but clownfish and sea anemones relationship is normally viewed as mutualism

Answer:

commensalism

Explanation:

Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected.

Living factors or organism that affect an ecosystem

Answers

Answer:

Biotic components are living organisms in an ecosystem. A biotic factor is a living organism that affects another organism in its ecosystem. Examples include plants and animals that the organism consumes as food, and animals that consume the organism.

Explanation:


HELP PLS First, Demetri will test the three solutions containing milk (lactose).

He begins the experiment by preparing the lactase enzyme solutions. In one beaker he dissolves 1 lactase tablet in 100 mL of water at room temperature. He stirs the mixture until the tablet has dissolved completely. He repeats this process in a second beaker, and then heats the beaker until the solution is boiling.

Demetri then tests these three milk (lactose) solutions for the presence of glucose:

milk in water
milk and lactase enzyme in water
milk and heated lactase enzyme in water
Test Tube 1 - Milk (Lactose): Demetri fills the first test tube one-quarter full of milk. Then, he slowly adds water to the milk until the test tube is three-quarters full. Using the stirrer, Demetri thoroughly mixes the solution. Then he inserts the test strip for 30 seconds and records its color.



Test Tube 2 - Milk (Lactose) and Lactase Enzyme: Demetri fills the second test tube one-quarter full with milk. He then adds the lactase-and-water solution until the test tube is three-quarters full. He uses a stirrer to thoroughly mix the solution. Next, Demetri inserts the test strip for 30 seconds and records its color.



Test Tube 3 - Milk (Lactose) and Heated Lactase Enzyme: Demetri fills the third test tube one-quarter full with milk. He then adds the heated lactase-and-water solution until the test tube is three-quarters full. After stirring, Demetri inserts the test strip for 30 seconds and records its color.



According to the test strips, which of these milk solutions contained glucose?

Answers

Answer:

2nd test tube, because test strip color turned to green, which indicates this test tube solution contained glucose.

Explanation:

Lactase will break down the lactose into glucose and galactose. In first test tube there is no such activity because there is no lactase presented.  In 3rd test tube as the enzyme is heated so it is get decomposed so in this case also there is no activity of lactase enzyme.

The second tube is the tube that contained glucose.

We can arrive at this answer because:

Lactase is a protein.This protein has the function of breaking lactose into smaller molecules, which are glucose and galactose molecules.This protein is sensitive to high temperatures and loses functionality in very hot environments.

In the case of the tests used in the question above, we can say that in the first test tube, the lactase solution was not added, so the lactose was not broken down. The lactase solution was added to the second test tube, where the lactose was broken down generating glucose and galactose. In the third test tube, the heated water prevented the lactase from acting and therefore it cannot break down the lactose.

Therefore, only the second tube has glucose.

More information:

https://brainly.com/question/13129?referrer=searchResults

Which part of the cell membrane is non polar and prevents the cell from dissolving.

Answers

Answer:

Non polar fatty acids

Explanation:

The fatty acid tails are non Polar

What happens to oxygen, glucose, and amino acid molecules in a healthy person?

Answers

Answer:

Oxygen plays a very important role in our body, oxygen along with nutrients from the food to create Adenosine triphosphate, which is used as a fuel for cell functions. Glucose is the main source of energy for cells and organs of body. The stored form of glucose is called glycogen.  Amino acids play an important role in metabolic pathway, gene expression. They are they building blocks of proteins and make up 75% of the body.

What is most likely effect on the energy pyramid if all producers are removed from the ecosystem

Answers

the energy pyramid will become completely dirstrupted

What type of monomer is used to form a dipeptide during protein synthesis

Answers

Answer:

Amino acids

Explanation:

Amino acids are the building blocks of proteins. If two amino acids are joined together it will make a dipeptide.

animo acids are used to form dipeptide during protein synthesis

What type of leaf is this?

Answers

Answer:

COLEUS I THINK

Explanation:

It’s a red mulberry

Where does the energy that powers the nitrogen cycle come from?

Answers

Answer:

When nitrogen is absorbed by the soil, different bacteria help it to change states so it can be absorbed by plants. Animals then get their nitrogen from the plants. Fixation - Fixation is the first step in the process of making nitrogen usable by plants. They absorb nitrates from the soil into their roots.

Explanation:

Answer:

When nitrogen is absorbed by the soil, different bacteria help it to change states so it can be absorbed by plants. Animals then get their nitrogen from the plants. Fixation - Fixation is the first step in the process of making nitrogen usable by plants. ... They absorb nitrates from the soil into their roots.

Explanation:

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