Answer:
The cell membrane contains pores that let all molecules in and out of the cell.
Explanation:
I believe it is this one not positive though
Answer:
I think its C. The cell membrane contains small pores that filters in needed substance and filters out waste products.
Explanation:
Sorry if it wrong it just makes the most sense.
hi please help this question is based on what you think
Does luck play a roll in evolution ? EXPLAIN WELL.
Answer:
Yes
Explanation:
If u want to equate that with “luck” feel free. There are any number of points in natural history where any species, not just us, could have turned out very differently.
Had the climate not changed in Africa…. Forcing our distant relatives from the forested areas into the plains… We might very well still number among the “great apes” rather than the genus “Homo”.
There would be dozens of simialar “what ifs” in our past. The entire spectrum of life on Earth might have turned out very differently indeed had the Permian Extinction not happened…. Those life-forms that populated the Earth prior to this event were very different than those that evolved from the few survivors. (Over 90% of all life on Earth was presumed to have been killed off.)
Because we can't see through a gas cloud, we would not use optical telescopes which collect
visible light to form images of stars inside a gas cloud. Which type of telescope would we use
to study new stars inside the giant gas cloud and why?
ANSWER ASAP
Answer: radio telescopes can be used.
Explanation:
Radio telescopes can be used to see through the dust and the star being born. The stars are born into clouds of gases in the space. Due to gravity more and more gas get collected and it forms a clump. When the clump get big enough the hydrogen atom crash each other to form the helium. The clump of gas becomes a star. The radio telescopes can be used to take pictures of these stars within the clump of gas. It can also be used to take picture of fusion of gases within a star to initiate the formation of new star.
Answer:
It's an infrared telescope.
Explanation:
We can't rely on an optical telescope since it only shows what we can see. In turn, we can use an infrared telescope because it allows us to see heat. We can use this heat to study celestial bodies, stars, and gases.
Sam is investigating the factors that affect photosynthesis. She keeps some plants in the dark for 24 - 48 hours. They receive no light. What does this remove from the plants?
Answer:
In photosynthesis, sunlight is necessary for it allows the plant to synthesize food from the CO2 and water. Without the light, it cannot carry out photosynthesis and create the food to feed itself.
By keeping some plants in the dark, Sam is removing the ability of the plant to capture light for photosynthesis.
Photosynthesis is a process whereby green plants capture light energy for the synthesis of carbohydrates using inorganic raw materials such as water and carbon dioxide.
The process of photosynthesis takes place in 2 major steps
Light-dependent reactionLight-independent reactionDuring light-dependent reaction, energy from light excites chlorophyll molecules and cause an electron to be displaced. The electron in the chlorophyll is replaced by the electron in water, leading to the cleavage of the bond between H and O and the evolution of O2. ATP and NADPH are produced and these are utilized in the light-independent reaction.
In the light-independent reaction, the molecules synthesized from the light-dependent reaction are used to fix carbon dioxide in a series of reactions resulting in the formation of carbohydrates.
Hence, keeping some plants in the dark will alt the light-dependent reaction and the entire photosynthesis process at large.
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21. In a portion of a gene, the nitrogenous base sequence is T-C-G-A-A-T.
Which nitrogenous base sequence would normally be found bonded to this
section of the gene?
A-C-G-T-A-A
A-C-G-U-U-A
A-G-C-T-T-A
U-G-C-A-A-U
Answer:
A-G-C-T-T-A
Explanation:
The nitrogenous base-pairs are Adenine (A)—Thymine (T) and Cytosine (C)—Guanine (G).
Adenine on one strand of a DNA molecule means thymine on the complementary strand, and vice versa.
Cytosine on one strand of a DNA molecule means guanine on the complementary strand, and vice versa.
A gene is a specific portion of a DNA molecule that codes for a trait.
A homozygous recessive female mates with a heterozygous male. What percentage of the
offspring could be homozygous dominant?
a. 50%
c. 0%
b. 100%
d. 25%
Answer:
C
Explanation:
0%
rr x Rr = Rr, Rr, rr, rr
Answer:
The answer is C
Explanation:
C: 0%
When would a diameter cut be appropriate?
O A problem in a 3-foot section of the tree
O A large blemish that ran the full length of the tree
O A disease from the bark had ruined the wood underneath it
One end of the tree was significantly narrower than the other
Answer:
A problem in a 3-foot section of the tree
Explanation:
it is the most reasonable way to choose
Using two of the following vocabulary words, explain how rainbows form: transmission, refraction, reflection, or absorption.
Answer:
refraction and reflaction
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What types of specialized cells and tissues do flatworms have in their excretory and
nervous systems?
Answer:
Explanation:
The flatworms are acoelomate organisms that include many free-living and parasitic forms. Most of the flatworms are classified in the superphylum Lophotrochozoa, which also includes the mollusks and annelids. The Platyhelminthes consist of two lineages: the Catenulida and the Rhabditophora. The Catenulida, or “chain worms” is a small clade of just over 100 species. These worms typically reproduce asexually by budding. However, the offspring do not fully detach from the parents and therefore resemble a chain in appearance. All of the remaining flatworms discussed here are part of the Rhabditophora. Many flatworms are parasitic, including important parasites of humans. Flatworms have three embryonic tissue layers that give rise to surfaces that cover tissues (from ectoderm), internal tissues (from mesoderm), and line the digestive system (from endoderm). The epidermal tissue is a single layer cells or a layer of fused cells (syncytium) that covers a layer of circular muscle above a layer of longitudinal muscle. The mesodermal tissues include mesenchymal cells that contain collagen and support secretory cells that secrete mucus and other materials at the surface. The flatworms are acoelomates, so their bodies are solid between the outer surface and the cavity of the digestive system.
Explain the process of alluvial land formation and resulting soil formation??
Answer: The alluvial soil is formed by the rivers that erode the rocks.
Explanation:
The rivers flows through the mountains and erodes the rocks. The sediments like silt and gravel get accumulated at the banks of the river that were flooded by the rivers.
The deposition of the eroded sediments results in the development and formation of the alluvial soil. The accumulation of the alluvial soil leads to development of alluvial land.
Describe the changes of a wave as it approaches the shore and becomes a breaker
Answer:
As a wave approaches the shore, it grows in height and steepness as the water gets more shallow. Eventually, the waves grows to the point that the water isn't deep enough to support it. At this point, the wave topples, or breaks, which results in a breaker.
Explanation:
organisms that consume wastes to obtain the nutrients they need to survive are classifieds as
Answer:
Decomposers
Explanation:
Answer:
Decomposer
Decomposers are organisms that break down dead or decaying organisms, they carry out decomposition, a process possible by only certain kingdoms, such as fungi. Like herbivores and predators, decomposers are heterotrophic, meaning that they use organic substrates to get their energy, carbon and nutrients for growth and development. While the terms decomposer and detritivore are often interchangeably used, detritivores ingest and digest dead matter internally, while decomposers directly absorb nutrients through external chemical and biological processes. Thus, invertebrates such as earthworms, woodlice, and sea cucumbers are technically detritivores, not decomposers, since they must ingest nutrients - they are unable to absorb them externally.
Does anyone have the Lab#5 Stimulated Gel Electrophoresis Who Robbed The Bank?
What motion is observed in a horse once the ischial arch is passed with a urinary catheter?
A) it lowers its head
B) its stomps its left front foot
C) it raises its tail
Answer: Option A.
It lowers the head.
Explanation:
The ischial arch is a prominent structure closer to the colliculus seminalis of horse. The ejaculatory duct is lateral to this and correspond to the area of ductus differenc eand vesicular gland opening.
The vesicular glands can be easily catheterized using a small-diammeter, flexible polyethylene catheter or a stylet . The catheter is inserted into the instrument channel of the videoendoscope and serves as a route for direct aspiration of fluid or instillation of pharmacologic solutions for direct treatment.It also helps to guide the scope head into the seminal vesicle .
Which is released during the formation of a peride bond?
A five-carbon sugar
An amino group
An amino acid
A water molecule
Explanation:
an amino group
Which of the following descriptions is correctly paired with its viral cycle?
A. Lytic cycle: Viral DNA is integrated into the host's DNA for replication.
B. Lytic cycle: Integrated viral DNA can cause the host cell to become more pathogenic.
C. Lysogenic cycle: Infection remains hidden until many years later when lysis and cell death occur.
D. Lysogenic cycle: Invading viruses direct the cell to produce enzymes that break down the cell wall.
Please help I reallly don’t understand this please just explain how photosynthesis and how water chemical mechanical energy works and how movement of matter and energy from plant work pleaseee help Construct a model to show the movement of matter and energy from plants into other organisms. Show how mass and energy are conserved before and after each interaction. For example, the beginning substances before an interaction equal the ending substances, and vice versa.
Answer:
▪Photosynthesis is the process by which green plants transform light energy into chemical energy.During photosynthesis, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen.
▪Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert chemical energy from oxygen molecules or nutrients into adenosine triphosphate (ATP), and then release waste products.
Photosynthesis is the process by which green plants transform light energy into chemical energy. During photosynthesis, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen.
What is photosynthesis?The term photosynthesis has been defined as the process in which green plants prepare their own food in presence of sunlight and during this process heat energy converts into chemical energy.
Cellular respiration has been known as the set of the metabolic reactions as well as the processes that take place in the cells of the organisms to convert chemical energy from the oxygen molecules or nutrients into the adenosine triphosphate (ATP), and then release waste products.
The energy and matter present at the start of any reaction will be same at the end of it as they can neither be created nor destroyed but can change from one form to another.
Therefore, Photosynthesis is the process by which green plants transform light energy into chemical energy. During photosynthesis, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen.
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what traits are made up of a combination of genes?
Answer: Alleles
Explanation:
tood chai
2. What is the difference between a specialist and a generalist?
Answer and Explanation:
The difference between a specialist and a generalist is that a generalist is able to eat a variety of food and can survive in different environmental conditions while a specialist is able to eat a specific diet or food and can survive in a certain type of environment.
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Outline the phases of the menstrual cycle, or the period in woman. please this should be at least 150 words. I will mark as BRIANILIST, please don't copy from Google, thank you.
Answer:
Menstruation, the follicular process, the ovulation and the luteal period are the four stages of the menstrual cycle. Specific menstrual complications include extreme or painful spells and a premenstrual syndrome (PMS). Knowing that a woman is most likely to conceive in the menstrual cycle can increase the chance of pregnancy. in simpler words, Bleeding phase, Pre-fertile phase, Fertile phase, Releasing an egg (ovulation), Post-fertile phase.Estrogen rates increase and fall periodically during the menstrual cycle. Estrogen rates increase during the mid-follicular process, then drop precipitously after ovulation. This is followed by a secondary increase in estrogen levels during the mid-UT phase, with a decrease at the end of the menstrual cycle.Elevated levels of estrogen are a risk factor for breast and ovarian cancer. High levels of estrogen can increase your risk of blood clots and stroke. Estrogen superiority can also improve the risk of developing a thyroid disorder. This may contribute to signs such as exhaustion and increases in weight.
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Which of the following statements about blood pH is true?
A. Carbon dioxide is a buffer that helps the blood pH remain around 7.4.
B. Carbonic acid is a waste product that makes blood pH deviate from 7.4.
C. 7.4 is a neutral pH, and the whole body needs to remain neutral to maintain homeostasis.
D. At a pH too far from 7.4, enzymes in the blood will stop functioning properly.
Answer:
D. At a pH too far from 7.4, enzymes in the blood will stop functioning properly.
Explanation:
The pH of blood is regulated 7.35 and 7.45. pH shows acid-base balance in the body and maintains a healthy balance of acidity and alkalinity.
Balance of acid-base provides optimum condition to enzymes to perform proper function. As, enzymes required optimum pH range for functioning properly, pH too far from 7.4 can denature the enzymes. Enzymes will lose its shape and will not function properly at high pH.
Hence, the correct option is D.
[FW.03]A pond is located beside an open mine. Mercury from the mine contaminates the river water. This is an example
of
O single pollution
multiple pollution
point source pollution
non-point source pollution
Explain two complex modes of human inheritance. Give examples.
Answer:
the pleiotropy and epistasis (more info below)
Explanation:
Many human traits have dynamic forms of ancestry. We can be regulated by a single gene with several alleles, or by several genes. Further complication can be added by pleiotropy (one gene, multiple effect) and epistasis (gene-gene interaction). A number of hereditary diseases are triggered by defects in one or a few genes. examples: autosomal dominant, autosomal recessive, X-linked dominant, X-linked recessive, and mitochondrial.
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Since the supercontinent Pangaea split up ~200 million years ago, the continents have remained in essentially the same positions. Do you agree?
Answer:
não concordo
Explanation:
pois com o passar do tempo por causa de algumas influencias naturais os continentes vão mudando de forma e posições
Do you think our homes and schools
should be powered by renewable energy?
Answer:
No. Because then every 2 years or so we would have to replace everything because the resource is limited
Explanation:
I would say yes. As non renewable energy will come for a long time but once used up u cant get it again because they are over. but renewable energy even if it takes time to renew it will never get over. so in that way will be able to save non renewable energy for a more important purpose.
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What's the most common type of mutation, and what impact does it have on natural selection?
Answer:
i think that's gene mutation
Explanation:
Answer:
The most common type of mutation is a deleterious mutation. Natural selection acts to remove this allele from the population.
Explanation:
What factor makes the Hawaiian Islands the perfect place for plant species to diversify?
Answer:
Climate
Water Supply
Resources
Explanation:
Answer in my own words:
The weather offers a large amount of water and warm temperatures. This services have all the essential tools to sustain plant life or the plant health.
Key words:
1: Sustain
2: Essential
Hope this helps.
Answer:
Temperature, recources, location, humidity, percipitation
Explanation:
How do you form a contraction?
Answer:
Contractions are formed when words are shortened by omitting one or more letters, most often replaced by an apostrophe. Contractions most frequently occur when two terms that usually appear next to each other in a sentence are merged into a new , unique phrase. Hope this helped!
Why should the announcement of a third supply intake for Las Vegas water cause concern?
Answer:
The announcement is of concern because it includes drilling activities on the ground, which can cause geological problems that cause unexpected and bad results for Las Vegas and the surrounding region.
Explanation:
Produces four daughter cells
Mitosis or meiosis
Answer:
Meiosis
Explanation:
Mitosis and meiosis are both types of cell divisions.
In mitosis, a parent cell undergoes one division and produces an identical, diploid cell. This results in 2 daughter cells.
In meiosis, a parent cell undergoes two divisions. This produces unique, haploid cells. The result is 4 daughter cells that are not identical to the parent cell.
Therefore, the answer is meiosis. Meiosis produces four daughter cells.
The diagram shows how a community will colonize bare rock, and then change over hundreds of years.
n this example, what is the main cause of the changes that the community undergoes?
a
ecological succession, because each community promotes the growth of the succeeding community
b
climate change, because each community is determined by climate
c
extreme weather events, such as hurricanes, because they disrupt one community and open niches for a new community
d
tectonic events, such as earthquakes, because they disrupt one community and open niches for a new community
Answer:
a
. ecological succession, because each community promotes the growth of the succeeding community
Explanation:
Ecological succession is the process in which species structure of an ecological community changes over time.
The given example shows ecological succession (secondary succession) as in the image series of community changes over hundred of years including growth of community from bare rocks to trees as each community is promoting growth of succeeding community. But the colonized community of trees after series of changes is disturbed by human activities or natural calamity (as shown in image) reduces an already established ecosystem is called secondary succession (Type of ecological succession).
Hence, the correct option is a. ecological succession, because each community promotes the growth of the succeeding community