Answer:
C
Explanation:
Phototaxis (phototactic response) is the cellular behavior in which cells swim toward or away from the light source. The euglena have eyespots that detect light so that it can move toward sunlight for photosynthesis.
Euglena require an eyespot to exhibit phototactic behavior. Thus option C is correct.
what is phototaxis ?Phototaxis is defined as the movement of an organism in response to external stimulus that means light, it is a locomotory movement of living organisms towards the source of light or away from the source of light.
Taxis means the movement of an organism in response to a stimulus like light or food, it is an innate response of an organism to variation in light intensity and direction.
More is the intensity of light in a particular direction the more will be phototactic stimulation occurs in the organism, its own biological reason and phototactic response are incidental and serve no end purpose.
The advantages of phototaxis are the regulation photosynthesis, the finding of food in phototrophic organisms, facilitation of larval dispersal, or the increased likelihood of gamete fusion on the surface.
Thus option C is correct.
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What is the glucose molecules created from during photosynthesis
Answer:
During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose.
Explanation:
can i have brainliest plz
I HAVE BEEN STUCK HERE FOR 5 MINUTES...!
vague repetitive pictures
Answer:
Should be C
Explanation:
D is wrong because standing out should mean they are spotted more easily, which means they get hunted down more often/ prey spot them easier
B is kind of weird because larger population = more competition, and I remember owls work alone
A is suspicious because they are both tawny owls and I don't understand how less food they need to be significant
C sounds plausible because the gray feather can be a "stronger" gene or something
List 5 ways that phosphorous is essential to plants & animal life on Earth.
Answer:
El fósforo (P) es esencial en todas las formas de vida conocidas, dado que constituye un elemento clave en muchos procesos fisiológicos y bioquímicos. Se trata de un componente presente en todas las células de todos los organismos vivos. El fósforo aparece en estructuras complejas de ADN y ARN que, al contener y codificar la información genética, controlan todos los procesos biológicos en las plantas. Además, el fósforo es un componente fundamental del sistema de transporte de energía en todas las células.
El fósforo no aparece aislado en la naturaleza, sino que se encuentra siempre combinado con otros elementos con los que forma los fosfatos que pueden ser muy complejos y presentarse bajo distintas formas en los suelos, el agua, las plantas, los animales y el hombre. Por tanto, se utilizará la palabra “fósforo” de forma genérica en lugar de identificar el fosfato concreto, aunque en la mayoría de los casos, se ofrecerán valores numéricos como P2O5 .
Hasta una época relativamente reciente, el crecimiento de las plantas y de los animales, y por extensión, la productividad de la agricultura, se veían limitados por la falta de fósforo, ya que anualmente solo se disponía de unas pequeñas cantidades de las rocas y de los minerales del suelo gracias a la acción erosiva de los elementos. Cuando los agricultores comenzaron a utilizar fertilizantes en el siglo XIX, los niveles de fósforo disponible para las plantas en muchos suelos eran todavía muy bajos. Por eso, hasta que no se comenzó a aplicar fósforo, la respuesta a otros nutrientes, especialmente al nitrógeno, era muy pequeña, es decir, que el fósforo era el nutriente limitante del crecimiento de las cosechas.
El fósforo desempeña un papel fundamental en la fotosíntesis, proceso por el que las plantas absorben la energía del sol para sintetizar moléculas de carbohidratos, es decir, de azúcares, que son transportados a los órganos de almacenamiento de las plantas. Este proceso es esencial para todas las formas de vida y constituye el primer paso en la cadena para producir alimentos, piensos y fibras.
Las raíces de las plantas absorben el fósforo del agua presente en el suelo y que se denomina solución acuosa del suelo.
Sin embargo, los compuestos de fósforo no son muy solubles y, como consecuencia, la cantidad de fósforo que la planta puede tomar de la solución acuosa del suelo tiende a ser mucho menor de la que necesita, especialmente cuando la planta se encuentra en un periodo de fuerte crecimiento. Por eso, el fósforo de la solución acuosa del suelo debería reponerse con una frecuencia de diez veces al día en esos periodos.
En un día, una cosecha de rápido crecimiento puede absorber el equivalente a cerca de 2,5 kg de P2O5 por hectárea (una hectárea equivale a 10.000 m2 ). De esto se deduce, por tanto, que es necesario que existan reservas adecuadas de fósforo en el suelo y que esas reservas puedan estar disponibles con facilidad. La mayoría de los suelos no abonados contienen una cantidad demasiado pequeña de fósforo, fácilmente aprovechable, para dar respuesta a la gran demanda de las cosechas, en especial durante ciertos periodos del ciclo de crecimiento. De ahí, que se imponga la necesidad de aplicar fertilizantes que contengan fósforo.
La carencia de fósforo afecta no solo al crecimiento de la planta y al desarrollo y rendimiento de la cosecha, sino también a la calidad del fruto y a la formación de las semillas. Asimismo, la carencia de fósforo puede retrasar la maduración de las cosechas, con lo que se retrasa la recolección y se pone en riesgo la calidad del producto.
Explanation:
Why do cells need to transport molecules?
Answer:
its the cell membrane
Explanation:
heres gogle support but i also did this in class
What type of materials need to be transported out of the cell?
Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
Answer:
porque le permite expulsar de su interior los desechos del metabolismo, también el movimiento de sustancias que sintetiza como hormonas.
Explanation:
how does acid rain affect an ecosystem?
Answer:
The ecological effects of acid rain are most clearly seen in aquatic environments, such as streams, lakes, and marshes where it can be harmful to fish and other wildlife. As it flows through the soil, acidic rain water can leach aluminum from soil clay particles and then flow into streams and lakes
Explanation:
Hope this helped <3
PLEASE HELP ME!!!!
What would happen to the members of a food web if most of the trees died?
A. only the trees will be effected
B. only things that eat tree leaves will have less to eat
C. Nothing will happen
D. The whole food web will be disrupted
Describe how proteins form (polypeptide)
Answer: Atoms were created after the Big Bang 13.7 billion years ago. As the hot, dense new universe cooled, conditions became suitable for quarks and electrons to form. Quarks came together to form protons and neutrons, and these particles combined into nuclei.
Answer:
Within a protein, multiple amino acids are linked together by peptide bonds, thereby forming a long chain. Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid.
differentiate between thallophyta bryophyta and tracheophyta
Answer:
The main difference between Thallophyta Bryophyta and Pteridophyta is the organization of each phylum. Thallphyta consists of algae, fungi, lichens, and cyanobacteria. The plant body of Thallophyta is a thallus. ... The plant body of bryophytes is not differentiated into true stem, roots, and leaves.
Explanation:
What change caused the rate of population growth to increase around point C?
Answer:
point c
Explanation:
All levels of biological organization and discription?pllsss paki sagutan po
please help me
What are segments?
Answer:
each of the parts into which something is or may be divided.
Structure that display characteristic of living organisms only within living cells
this is the answer I hope it helps u
8.What attaches muscles to bones?
veins
tendons
ligaments
joints
most common type of arch, loop and whorl?
Answer:
yes
Explanation:
most common pattern being found in 65 to 70 percent of all fingerprints
How has technology such as telescopes, satellites, computers, and GPS units affect the scope of scientific discovery?
Answer:ghhjhjhkjhkjkjhkhExplanatio
1 point
Which explanation best identifies the relationship between mitosis and
reproduction? *
Mitosis is a form of sexual reproduction because the daughter cells form from one
single parent cell.
Mitosis is a form of sexual reproduction because the daughter cells are genetically
different from the parent cell.
Mitosis is a form of asexual reproduction because the daughter cells form a new
nuclear membrane after reproduction
Mitosis is a form of a sexual reproduction because the daughter cells are genetically
identical to the parent cell.
Answer:
Mitosis is a form of sexual reproduction because the daughter cells are genetically identical to the parent cell.
Explanation:
If you look up your question, it will give this exact answer.
Which statement describes how the atmosphere gains energy by convection?(1 point)
Air warmed by the ground rises.
The ground warms the air just above it.
Solar energy warms gases that make up the air.
Energy moves from the clouds to the air.
The statement that describes how the atmosphere gains energy by convection is : Air warmed by ground rises ( A )
The rising warm air from the ground into the atmosphere explains the exchange of heat energy from the ground into the atmosphere through convection and this possible due the variation in density and temperature of the ground air and the atmospheric air.
What is ConvectionConvection is the transfer of heat energy through the movement of a medium such as air or water from one region to another. convection can occur as :
Natural convection Forced convectionHence we can conclude that The statement that describes how the atmosphere gains energy by convection is Air warmed by ground rises
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How do free energy machines work?
Explanation:
The machine is plugged into an electrical source,which gets plugged the motor's wheel spinning.The machine is then unplugged and the wheel keeps spinning under its own interia. Then electrical energy is extracted from the spinning wheel.
I hope it's helpful!
Which part of the brain stem controls the heart rate and respiratory rate?
pons
thalamus
medulla oblongata
midbrain
Answer:Medulla
Explanation:
Answer:
Medulla Oblongata
Explanation:
The primary role of the medulla is regulating our involuntary life sustaining functions such as breathing, swallowing and heart rate. As part of the brain stem, it also helps transfer neural messages to and from the brain and spinal cord. It is located at the junction of the spinal cord and brain.
Which of the following is an advantage angiosperms and gymnosperms have over mosses?
1. they are seed producing so can populate more areas
2. they can photosynthesize
3. they can use oxygen
4. they do not need water
Answer:
they are seed producing so can populate more areas
Explanation:
thinks mrs. Clack that finned tetrapods developed "hands" before or after migrating to land
Answer:
what am i supposed to anwser? should I prove her wrong?
Explanation:
Why are stabilizing proteins neeed to keep the DNA strands separated?
Single-stranded DNA-binding proteins are protected exactly tightly to DNA, but with extremely little carefulness for individual nucleotide sequences.
What is DNA?
They accomplish this by interacting strongly with the DNA backbone, via hydrogen bonds with the ribose and phosphates and complementary control interactions with the phosphates.
When the Proteins of DNA Replication DNA Helicases. These proteins attach to the double-stranded DNA and facilitate the separation of the two strands. DNA single-stranded critical proteins.
Although, These proteins bind to the DNA as a stable tetramer the single-stranded structure is produced by the action of the helicases.
Single-stranded DNA-binding proteins (e.g., [RFA] eukaryotic replication factor A) then stabilize the decompressed template DNA, maintaining it in an extended single-stranded state so that it can be simulated by the polymerase.
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What are the four types of adaptations?
behavioral
physiological
structural
Explanation:
sorry I only know three
Answer: There are three types of adaptations: Behavioral, Physiological, and Structural.
ILL GIVE U BRAINLYIST
Answer:
D.
Explanation:
That is where it demonstrates how the word is said. it's easy to identify this because the pronunciation always comes right after the word itself in the definition.
Answer:hbhh
FffcffExplanation:
PLZZ HELP!
In what organelle is the genetic material found inside?
Question 3 options:
Golgi Apparatus
Nucleus
Ribosome
Mitochondria
Answer:
nucleus is the answer your welcome
Answer:
nucleus
Explanation:
Im taking the test now
Can someone help me fill in the blanks. Thank you.
Answer:
1) fungi
2) tubers
3)bulbs
4) unequally
5) cuttings
6)equally
7)root
8) mitosis
this my knowledge on this questions...hope i helped!
How do adult drones differ from adult worker ants?
a. Drones have wings; workers don't
b. Drones have eight legs; workers have six
c. Drones lack exoskeletons; workers have them
d. Drones have simple eyes; workers have compound
eyes
Answer:
a. Drones have wings; workers don't
Explanation:
"Flying ants may be male (the drone) or female (the queen)."
You do a serial dilution in the same manner as the one in the video. A plate with a sample volume of 10-6 mL produced 43 colonies. What was the original cell density (CFU)?
Answer: 43 x 10^6 CFU.
Explanation:
Plate count is a method used to determine the number of viable microorganisms in a sample. When the bacterial concentration is high, serial dilutions are carried out in a 1:10 sequence. Then, the dilutions are successive dilutions keeping the dilution factor constant at each step. Small aliquots of these dilutions are seeded in medium contained in a Petri dish where the bacteria grow forming colonies. Then the plates are incubated and colonies develop both within the agar and on the surface.
If the concentration of the seeded aliquot is too high, the bacteria will grow too much and it will not be possible to distinguish the colonies. However, if the concentration is very low, the number of colony forming units (CFU) may be very low and thus can be counted.
Colony forming units are calculated:
CFU = Number of colonies / (volume seeded on the plate * dilution).
The dilution is 10^-6, the number of colonies counted is 43, and usually the volume plated is 0.1 mL, so we replace that in the equation:
CFU= 43 / (0.1 mL * 10^-6)
CFU= 43000000 = 43 x 10^6
Describe three abiotic and three biotic components of an ocean marine ecosystem, Please Help Now!!
Answer:
Biotic factors include plants, animals, and microbes; important abiotic factors include the amount of sunlight in the ecosystem, the amount of oxygen and nutrients dissolved in the water, proximity to land, depth, and temperature. Sunlight is one the most important abiotic factors for marine ecosystems
Explanation:
Answer:
Biotic factors include plants, animals, and microbes; important abiotic factors include the amount of sunlight in the ecosystem, the amount of oxygen and nutrients dissolved in the water, proximity to land, depth, and temperature. Sunlight is one the most important abiotic factors for marine ecosystems
Explanation:
PLEASE HELP THE ASSIGNMENTS DUE TODAY
Which of the following statements about human population growth is TRUE?
(2 Points)
a. The population size is growing, and growth rate is increasing.
b. The population size is growing, and growth rate is decreasing.
c. The population size is decreasing, and growth rate is increasing.
d. None of these is true.
Answer:
The population size is growing, and growth rate is increasing
Answer: a
Explanation: