True, silicon is a solid at room temperature, but argon (Ar) is a gas.
Which of the following best describes plants of the family poaceae?
Answer:
Parallel veins in the leaf
Explanation:
The leaf veins run parallel to one another.
What do motor neurons do? URGENT FOR SCIENCE 20 POINTS!!!!!!!!!!!!!! BRAINLIEST
Answer:
neurons transmit impulses from the spinal cord to skeletal and smooth muscles (such as those in your stomach), and so directly control all of our muscle movements
I think...............
Answer:
"Motor neurons of the spinal cord are part of the central nervous system (CNS) and connect to muscles, glands and organs throughout the body. These neurons transmit impulses from the spinal cord to skeletal and smooth muscles (such as those in your stomach), and so directly control all of our muscle movements."
Explanation:
G o o g l e helped me answer your question, I hope this helps with your science.
Animals use energy from their food to do all of the following , except
A. move
B. complete photosynthesis
C. repair their bodies
D. grow
Which factors were determined to directly cause the loss of skin pigmentation in humans as a result of natural selection?
(1 point)
1. a change in the diet of human populations as they settled in colder climates
2. the clothing worn by humans in the early 8th century
3.the interaction of human populations with predators in colder climates
4.the impact of UV radiation on folate and Vitamin D levels in human populations
Answer: The answer is 4
Explanation:
Vitamin D controls your skin pigment. It's kind of like when someone has an iron deficiency they get bruises and they turn a whiter shade.
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The factors that were determined to directly cause the loss of skin pigmentation in humans as a result of natural selection are the impact of UV radiation on folate and Vitamin D levels in human populations.
Ultraviolet B radiation produces diet D in human skin. Ultraviolet radiation can, however, smash folate. Folate is critical for the speedy increase of cells, particularly at some point in which its deficiency can motivate neural tube defects. The human frame additionally has a mechanism to save you overproduction of vitamins.
What is UV radiation?Ultraviolet is a shape of electromagnetic radiation with a wavelength from 10 nm to four hundred nm, shorter than that of seen light, but longer than X-rays. UV radiation is found in sunlight and constitutes approximately 10% of the whole electromagnetic radiation output from the Sun.
Thus it is learned that the above answers are well-explained factors that were determined to directly cause the loss of skin pigmentation in humans as a result of natural selection bout.
To learn more about natural selection refer to the link :
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explain how all the layers of earth are necessary to create life on the surface
Answer:
The layers of Earth provide geologists and geophysicists clues to how Earth formed, the layers that make up other planetary bodies, the source of Earth's resources, and much more.
Explanation:
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water is a polar compound because it exhibits____charges
Answer:
I think it is negative charges
Explanation:
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Which phase of cell division is shown?
anaphase II
telophase I
telophase II
prophase I of meiosis
Answer:
Anaphase II
Explanation:
I took the test
Gene mutations can be caused by many things. These mutations are biologically important because they
can be passed to the offspring if they occur in any cell of the body
can result in a new variety of gene combinations in the species
are always harmful and therefore help to eliminate weak traits
occur at a regular rate and therefore can be controlled
Answer:
Can result in a new variety of gene combinations in the species
Explanation:
The third option is blatantly untrue- gene mutations are sometimes harmful, usually mundane and do nothing, and sometimes extremely helpful.
The fourth option is also untrue- genetic mutation is completely random.
This leaves us with the first two-
The first option is true, but it's not why genetic mutations are important, it's simply how they are passed on.
The second option is the awnser because gene diversity is extremely important in populations, and 'variety of gene combinations' is just another way to say gene diversity.
what is cell y and cell x
Answer:
Humans and most mammals have two sex chromosomes, the X and Y. ... Egg cells all contain an X chromosome, while sperm cells contain an X or a Y chromosome. This arrangement means that during fertilization, it is the male that determines the sex of the offspring.
Explanation:
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3 Stimuli Plants that adapt to
Answer:
-light
-gravity
-water
In animal cells,____are important for cell division and reproduction because they organize the spindle upon which the cell's
chromosomes are pulled apart.
A) vacuoles
B) lysosomes
C) centrioles
D) ribosomes
how might abnormalities in an animal’s anatomy or Physiology have a negative impact on its health and well-being
Examples of organelles
Answer:
Nucleus, mitochondria, cell membrane, ribosome, golgi body
Explanation:
What type of pollination creates hybrids?
Answer:
Cross-pollination
Explanation:
Which component of skin protects against UV light? (1 point)
O sweat glands
O melanin
O epidermis
O vitamin D
Answer:
Melanin
Explanation:
Melanin is the protective component of skin that defends us against UV light.
UV light poses big risks to our health, as it can damage DNA. DNA damage can lead to cancers like skin cancer.
Melanin is a pigment in the skin that protects us from UV light. This pigment blocks UV radiation from entering our skin and damaging our DNA.
So, the correct answer is melanin.
Answer:
1. melanin
2. moving away from the equator
3. the impact of UV radiation on folate and Vitamin D levels in human populations
4. A change in one variable produces a change in the other.
5. less predation
Explanation:
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Color and Natural Selection Quick Check
what is the hereditary process and why is it important to living organisms?
Answer:
Heredity is important to all living organisms as it determines which traits are passed from parent to child. Successful traits are more frequently passed along and over time can change a species. Changes in traits can allow organisms to adapt to specific environments for better rates of survival.
Explanation:
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Answer:
heredity is important to all living organisms as it determines which traits are passed from parent to child. Successful traits are more frequently passed along and over time can change a species. Changes in traits can allow organisms to adapt to specific environments for better rates of survival
How were the mountains surrounding the Canyon formed?
Helpppppppo help help help help help help
Answer:
True
Explanation:
Cilia are essential for movement of paramecia.
Answer:
true
Explanation:
they do have cilia that helps them move
A red flowered plant (RR) is crossed with a white flowered plant (WW) and produces plants with pink flowers (RW). If two pink flowered plants are crossed, what color offspring could be produced
Answer:
It would be 100 % pink.
Explanation:
Pink and Pink make Pink. Just as Red and White make Pink.
Due to incomplete dominance, when two pink flowered plants are crossed, the color of offspring could be 1Red: 2Pink :1White.
What is incomplete dominance?In some cases it happens that a certain characteristics does not match with either of their parents, rather it shows new traits.For example: snapdragon.When parent generation of red flowered plant (RR) is crossed with a white flowered plant (WW), F1 produces plants with pink flowers (RW). it does not resembles either of their parents.And when F1 was self pollinated: RW x RW, it produces 1 RR: 2RW: 1WW.Hence, the offspring will be 1 Red flowered plant: 2 Pink flowered plant :1 White flowered plant.
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I had a room full of 666 cockroaches which included 24 albinos. These albinos were so scary looking that I squashed them with a heavy piece of metal over and over again until they were a pile of left over exoskeleton and fluid and let the remaining cockroaches breed. The next generation of these horrid little baby cockroaches totaled 13,485. Assuming that the allele for albinism is recessive and we are still in equilibrium, how many recessive alleles are there in the population. (round to the nearest WHOLE number... 1.234 rounds to 2... there is no such thing as .234 of an organism)
Answer:
Number of albino cockroaches = 486 cockroaches
Explanation:
Assuming that the population is in Hardy-Weinberg equilibrium and that albinism is recessive, the Hardy-Weinberg equation is used to determine the frequencies ofnthe different alleles in the population
According to the Hardy-Weinberg equation : p² + 2pq + q² = 1
Also p + q = 1
Where p² is the frequency of cockroaches having similar alleles for the dominant trait;
2pq is the frequency of individuals with the heterozygous allele, while q² is the frequency of the individuals having similar allele the recessive trait, albinism.
q² = 24/666
q² = 0.036
Since, the frequency of albinism in the population 0.036, number of individuals with the recessive allele, that is albino cockroaches in the next generation is obtained by multiplying the frequency with the number of individuals in the next generation.
Number of albino cockroaches = 0.036 × 13485
Number of albino cockroaches = 486 cockroaches
In DNA, what base pairs with guanine?
adenine
cytosine
thymine
guanine
If there's a higher concentration of solutes outside of the cell what will happen
Answer:
If there's a higher concentration of solutes outside of the cell (the solution is known as hypotonic solution) then the cell will swell up as the solutes will flow into the water through the process of osmosis. The cell may also swell up & burst (if it's an animal cell).
Which of the following best describes succession
The evolution of species through natural selection to become different species
over time
The dranzes in species composition in a community over time as species
colonize an area
The reduction in Bioteesias o men over time
The creation of new e from nothing in an ecosystem
All of these are a good description of secession
Answer:
the greating new form ide
What volume will 1.2 mol of N, occupy at 17°C
and 2.0 atm?
Answer:
14.284
Explanation:
Know parameters from the problem are: the amount of the substance/ gas molecule is 1.20 mol, the Temperature of the gas is 17 Celsius degrees (i.e. 290.15 K [17 Celsius degrees plus 273.15 K]), the pressure exerted on the container by the gas is 2.0 atm.
The unknown ( what you are asked to find) is the volume that the gas would occupy in its container under those conditions above; V=?.
We use the ideal gas equation here; PV=nRT. R in this equation is called the molar gas constant or Ideal has constant. There are many values for R given different circumstances. For the condition of this problem, R's value is 0.08205 L atm/mol K.
Make V the mathematical subject of the equation PV=nRT.
V=(nRT)/P
V=(1.20 mol x 0.08205 L atm per mol per K x 290.15 K)/ 2.0 arm
V= (28.568169 L atm mol per mol per K)/ 2.0 atm
V= 14.284 [(L atm mol K)/(atm mol K) atm mol K is in the numerator and the denominator would be canceled. Leaving only L.
Therefore, V= 14.284 L of N
A virus that can switch from the lysogenic cycle to a lytic cycle is called
o transformation.
o latency.
o phage conversion.
o temperate.
o injection.
Name three functions of the hormone epinephrine
List 5 reasons why earth is under populated
Answer:
The earth is unpopulated by natural causes yet many causes in people all over the earth some personal reasons could be do to: infertility, still -born births, misc arriage, and health problems. But as proved and seen today there are many natural causes such as: kill ings, police bru tality , life- threa tening diseases, dome stic viole nce, suic ide, and many things that go unnoticed in communities around us that causes earth to be unpopulated.
Explanation:
Transcribe the following sequence.
5' TCGGCGCTATACTTT 3
b. What enzyme does transcription?
How many layers are in a gram positive cell wall and how many are in a gram negative cell wall ?
The cell wall of gram-negative bacteria is thin (approximately only 10 nanometers in thickness), and is typically comprised of only two to five layers of peptidoglycan, depending on the growth stage. In gram-positive bacteria, the cell wall is much thicker (20 to 40 nanometers thick).
A squirrel has 40 chromosomes in a somatic cell.
a. How many homologous pairs are found in a diploid cell?
b. How many single chromosomes (unreplicated) are found after the Sphase?
c. How many chromosomes are present in one cell at the end of meiosis II?
d. How many chromatids will be found at the beginning of meiosis I?
e. How many cells will be produced at the end of meiosis II?
f. How many tetrads will form in mitosis?
Answer:
How many homologous pairs are found in a diploid cell? 22 pairs
b. How many single chromosomes (unreplicated) are found after the Sphase? 46 chromosomes
c. How many chromosomes are present in one cell at the end of meiosis II? 15 chromosomes
d. How many chromatids will be found at the beginning of meiosis I? 92 chromatids
e. How many cells will be produced at the end of meiosis II? four
f. How many tetrads will form in mitosis? 23 different tetrads
Explanation:
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