True or False: A neuron's response is all-or-nothing.
Answer:
TRUE
Explanation:The all-or-none law is a principle that states that the strength of a response of a nerve cell or muscle fiber is not dependent upon the strength of the stimulus. ... Essentially, there will either be a full response or there will be no response at all for an individual neuron or muscle fiber.
Answer: True
Explanation:
What causes ocean tides to reach higher up on a shore at certain times of day than at others? A. The moon's gravity and Earth's rotation B. The ocean's conveyor belt and refraction C. Earthquakes and volcanoes O D. Temperature and salinity differences
Answer:
A
Explanation:
I read about ocean tides. the Moon has an effect on the ocean which causes the ocean to bulge toward the Moon. When the Moon is in alignment with the sun the ocean bulges out more because of the added gravity. The Moon though smaller than the sun has more gravitational pull than the sun.
1. A dominant gene (A) causes yellow color in rats, the dominant allele on another independent gene (R) produces black coat color. When the two dominants occur together (A_ R_) they interact to produce gray coat color. Rats of the genotype aa are cream-colored. If a gray male and a yellow female, when mated, produce offspring approximately 3/8 of which are yellow, 3/8 gray and 1/8 cream, and 1/8 black, what are the genotypes of the parents
Answer:
Parents: Yellow (Aarr) and Grey (AaRr)
Explanation:
Given:
allele A = yellow
allele R = black,
Heteroozygous = gray
Genotypes of the parents:
yellow (Aarr) - female
gray (AaRr) - gray
cross between these
Parents: Yellow (Aarr) and Grey (AaRr)
Gametes: (Ar, ar) and (AR, Ar, aR, ar)
F1 (Punnet square)
----|----- AR ------|------- Ar ------|------ aR -----|----- ar
Ar | AARr (gray) | AArr (yellow) | AaRr (gray) | Aarr (yellow)
ar | AaRr (gray) | Aarr (yellow) | aaRr (black) | aarr (cream)
Ratio: 3/8 yellow : 3/8 gray : 1/8 cream : 1/8 black
1. Below is a diagram of the male
reproductive system. Which structure is
represented by D?
A. scrotum
B. testes
C. prostate gland
D. epididymis
Answer:
A:scrotum
Explanation:
its part of the male reproductive system. I looked it up.
Which of the following is a true statement?
The oceans replenish groundwater.
Lakes are only found in the Northern Hemisphere.
Coral reefs and sandbars create lagoons.
The oceans provide water for rivers and streams.
Answer:
Coral reefs and sandbars create lagoons.
Explanation:
↑↑↑↑↑↑ the one above is the answer
3 examples of relationships between geologic and biologic events
Answer: Volcanic eruptions, earthquakes and tsunamis are all dramatic examples of geological events.
Explanation:
The pathophysiology of osteomalacia involves a. collagen breakdown in the bone matrix. b. inadequate mineralization in the osteoid. c. crowding of cells in the osteoid. d. increased osteoclast activity.
Answer:
The correct answer is - b. inadequate mineralization in the osteoid.
Explanation:
Osteomalacia is a condition where the bones become weak and soft, this bone softening is occurred due to mainly vitamin D deficiency that also causes rickets. It leads to insufficient or inadequate mineralization in the osteoid.
This conditing when takes place in kids and young adult leads to curve or bowing during the growth period. In this case, bones are very prone or easily fractured.
1. What is the most important mutation that led to human life?
Answer:The ultimate source of all genetic variation is mutation. Mutation is important as the first step of evolution because it creates a new DNA sequence for a particular gene, creating a new allele. Recombination also can create a new DNA sequence (a new allele) for a specific gene through intragenic recombination.
Explanation:
hypothesis on what is the effect of the genes of the parental mice on the fur color of the offspring mice? use "If...then...format
Answer:
If the GENES of the parental mice encodes for a black fur, THEN the FUR COLOR of one of the offspring mice will be black.
Explanation:
Hypothesis is one of the steps used in the scientific method. It is a testable explanation of a given question or observation. Hypothesis in an experiment must be subjected to testing via experimentation in order to determine whether to reject it or not.
Hypothesis is usually constructed in the IF, THEN format. It tells us how the independent variable (cause) affects the dependent variable (outcome). In this case, a question is asked this: "what is the effect of the genes of the parental mice on the fur color of the offspring mice?"
A possible hypothesis will be: If the GENES of the parental mice encodes a black fur, THEN the FUR COLOR of one of the offspring mice will be black.
Answer:
A. If either parent mouse passes a dominant allele, the offspring will have black fur.
Explanation:
Either option is correct because it didn't show any green check. It determines on what hypothesis you wrote. I chose A because it relates to my statement. <33
Rejection occurs when the recipient’s immune system recognizes the donor tissue as foreign
How do mutations affect natural selection
Answer:
The idea of natural selection would in theory be affected by mutations because natural selection invloves a species/animal only surviving by having a certain trait. Over time, all of the animals/species would have this trait through elimination partnered with reproduction. A mutation may begin this cycle by giving an animal the ability to have an advantage over its fellow species.
Explanation:
Answer:
They affect how likely an organism is to survive and reproduce
Explanation:
Some one help me please ASAP !
Answer: model 3 answer, choice C
Explanation: A compound is a mix of two or more elements so then your answer is narrowed down to C and D. And now you have to see which one correctly identifies the definition of a compound. So now you have to see which one correctly identifies the definition of a compound. So your answer is model 3.
Here is a pedigree for colorblind (H)
What is fred's genotype?
Answer:
[tex]x^{h} y[/tex]
Explanation:
Fred has inherited the colorblind trait from his mother. We know this because his spot on the pedigree is filled in. Because he is a male his genotype must be some variation of xy and because he is colorblind he must have the recessive "h" on his x chromosome. So his genotype (genetic type) is [tex]x^{h} y[/tex]
5. The double helix model of DNA explained Chargaff's rules
because
A. adenine could hydrogen-bond with thymine and
guanine could hydrogen-bond with cytosine to hold the
helix together.
B. a helix repeats itself many times over, so the four bases
in DNA can repeat themselves many times.
C. adenine and thymine are found in one strand of the
double helix and guanine and cytosine are found in the
other strand.
OD. adenine could change places with thymine while
munninn anuld chanannhan with
Answer:A adenine could hydrogen-bond with thymine and guanine could hydrogen bond with cytosine to hold the helix together
Explanation:
The double helix model of DNA explained Chargaff's rules because adenine could hydrogen-bond with thymine and guanine could hydrogen-bond with cytosine to hold the helix together. The correct option is A.
What is Chargaff's rule?According to Chargaff's criteria, guanine and cytosine should be equal in amount in the DNA of every species and organism, and adenine and thymine should be equal in amount.
Additionally, the purine and pyrimidine bases should be in a 1:1 stoichiometric ratio.
The ratio of the several nitrogenous bases present inside the DNA molecule is described. It assists in figuring out the makeup and structure of DNA in various species.
Because adenine could hydrogen bond with thymine and guanine could hydrogen bond with cytosine to maintain the helix together, the double helix model of DNA provided an explanation for Chargaff's rules.
Thus, the correct option is A.
For more details regarding Chargaff's rule, visit:
https://brainly.com/question/14083251
#SPJ5
how do buffers work in the human body?
Answer: They can help prevent a deadly change in blood pH. They can help keep blood below pH 7.0. They can help keep blood at a pH of 7.0.
Explanation:
List the process(es) you see in the model that take carbon dioxide OUT of the atmosphere.
Help:)
Answer:
D
Explanation:
The only process in the model that takes carbon dioxide out of the atmosphere is process D.
Process D is otherwise known as photosynthesis and it is peculiar only to green plants and blue-green algae.
During this process, the atmospheric carbon dioxide combines with another inorganic substance (water) in the presence of sunlight energy to produce carbohydrates (glucose). Oxygen is released as the by-product of the process and the equation is as below:
[tex]6CO_2 + 6H_2O + sunlight --> C_6H_1_2O_6 + 6O_2[/tex]
In the testes, sperm cells replicate and differentiate in the _________. Question 2 options: urethra septum tunica albuginea seminiferous tubules ductus deferens
Answer:
seminiferous tubules
Explanation:
Seminiferous tubules are coiled tubes where sperm cells are produced by a process referred to as spermatogenesis. These tubes are located in the testes or testicles (i.e., male reproductive glands/gonads). Each testicle contains approximately 250 compartments known as testicular lobules, while each testicular lobule has 1 to 4 seminiferous tubules which converge to form a single straight tubule. Once sperm cells mature, they travel through the seminiferous tubules to be stored in a coiled tube called the epididymis.
Word Bank: Slowly, Within, Different, Transmitted, Densely, Sonar, Solids, Absorption, Bounces
Mechanical waves react to different mediums in different ways. Some mechanical waves are _________________ through a medium, meaning they pass through the medium. The way in which waves are transmitted depends upon the type of material. In ________________, mechanical waves travel rapidly, because the molecules are ___________________ packed. In liquids and air, however, mechanical waves travel more _________________, because the molecules are spread farther apart.Other mechanical waves are reflected off a medium. When a mechanical wave is reflected, it ______________ off the medium and then travels in a ______________ direction. ______________ is an application that uses sound wave reflection to determine how deep water is. A third way mechanical waves react to a medium is _______________. When a mechanical wave is absorbed, it remains __________________ a medium and is not transmitted to another medium.
Answer:
Mechanical waves react to different mediums in different ways. Some mechanical waves are TRANSMITTED through a medium, meaning they pass through the medium.
The way in which waves are transmitted depends upon the type of material. In SOLIDS, mechanical waves travel rapidly, because the molecules are DENSELY packed. In liquids and air, however, mechanical waves travel more SLOWLY, because the molecules are spread farther apart.
Other mechanical waves are reflected off a medium. When a mechanical wave is reflected, it BOUNCES off the medium and then travels in a DIFFERENT direction. SONAR is an application that uses sound wave reflection to determine how deep water is.
A third way mechanical waves react to a medium is ABSORPTION. When a mechanical wave is absorbed, it remains WITHIN a medium and is not transmitted to another medium.
The fill in the blanks will be filled with TRANSMITTED, SOLIDS, DENSELY, SLOWLY, BOUNCES, DIFFERENT, SONAR, ABSORPTION, WITHIN
Mechanical waves:react to distinct mediums in various ways. Some mechanical waves are TRANSMITTED via a medium, meaning they pass via the medium. The way in which waves are transmitted based upon the type of material. In SOLIDS, mechanical waves travel rapidly, due to the molecules are DENSELY packed.
In liquids and air, however, mechanical waves travel more SLOWLY, due to the molecules being spread farther apart.Other mechanical waves are reflected off a medium.
When a mechanical wave is reflected, it BOUNCES off the medium and then travels in a DIFFERENT direction. SONAR is an application that uses sound wave reflection to determine how deep water is.
A third way mechanical waves react to a medium is ABSORPTION.When a mechanical wave is absorbed, it remains WITHIN a medium and is not transmitted to another medium.
Learn more about the waves here: https://brainly.com/question/3102539
The time it takes an object to go around another object (one year) is
Answer:
365 days
Explanation:
Order the levels of organization of living things. (Order the levels starting from top to bottom with the smallest at
the top)
biome
species
biosphere
population community
ecosystem
WILL GIVE BRAINLIEST
Humans always have a negative impact on the environment.
Please select the best answer from the choices provided
T
F
What does the axon of a neuron do?
A
protect the dendrites
B
carry signals away from the soma
C
insulate the myelin sheath
D
process the information it receives
how is cancer cell division different from regular cell division
Why are construction sites considered major sources of water pollution?" 1 point
They introduce high levels of salt into local water sources.
Soil erosion rates accelerate dramatically, impacting water quality in streams and
rivers
They cause sinkholes to form, which pollute local water sources.
Sawdust leaches into the soil, causing the water that runs into rivers and streams to
be cloudy and full of particles
Soil erosion rates accelerate dramatically, impacting water quality in streams and rivers.
Answer:
B
Explanation:
What are the functions of proteins in cells and viruses?
someone please help me, I’ve done this like 10 times.
The amount of sunlight reflected from the Moon to Earth is what characterizes the Moon’s appearance. During which phase would the Moon be farthest away from the Sun?
Answer and I will give you brainiliest
heeeeelp PLZ
Which of the following is true about soil color? a. Soil vary in color based on their mineral content. b. Soils do not vary in color based on their minimal content. c. Soils consisting of only a few minerals are always darker. d. Soils is consisting of many different minerals are always darker.
Answer:
A
Explanation:
cant explain gtg
Answer:A
Explanation:
If there will be changes on trophic levels, what will be the effects on the ecosystem?
Answer:
It can significantly alter the homeostasis of the ecosystem
Explanation:
The trophic level is the position that occupies a given organism/ population/species in the food web. In a food web, the trophic levels are organized into a first category (formed by primary producers, e.g., plants), a second level (primary consumers, e.g., herbivores), and subsequent categories (predators, e.g., carnivores). The abrupt change in the number of organisms belonging to the same trophic level generally has a negative effect on the ecosystem by modifying the trophic structure of communities. For example, decreasing the number of producers will produce a decrease in the number of primary consumers, thereby altering the homeostasis (equilibrium) of the entire ecosystem. On some occasions, it may eventually lead to the extinction of populations and species.