Answer:
None of these.
Explanation: The plants like cycads and ginkgos have swimming sperms. they need water to complete their life cycle.
There are many adaptations seen in the plants like liveworts, ferns and mosses in which they require water to complete its life cycle. This adaptation is not only restricted upto cyptograms. This can also be seen in the plants like ginkgos and cycads. Their sperms are very strange.
The arctic fox and gray fox evolved from the same species over thousands of years. can you place these steps in the process of allopatric speciation along the timeline?
A mother and father have a young daughter who was diagnosed with lesch-nyhan syndrome. no one in the father\'s family was ever diagnosed with the syndrome. the mother\'s maternal grandfather was diagnosed with lesch-nyhan syndrome, but neither one of her parents was diagnosed with the condition. select all the descriptions that could explain how their daughter inherited lesch-nyhan syndrome.
sociology is best defined as the study of
Answer:
B. Their background or traits,rather than their individual performance
Explanation:
Consider the uninoculated tube.
a. is it a positive or negative control? negative
b. what information is provided by the uninoculated control?
The uninoculated tube is considered to be a negative control because a negative control is an effect of having to show no response. Am uninoculated control is where organisms are not being inoculated such as having a culture bacteria of not being inoculated with an organism.
"where in the rat's digestive system does mechanical digestion occur? chemical digestion occurs at three points along the digestive track. name those three points and what type(s) of foods are being chemically digested at each one."
Label the plasma membrane of a cell that is placed in a solution
Wastes are poisonous to a cell and must be removed from the cytoplasm. Predict how cell size could affect the removal process and the survival of a cell.
Cell size impacts waste removal; larger cells have a lower surface area to volume ratio, making waste elimination less efficient. The greater distance substances must travel within larger cells slows the diffusion rate, hindering cellular metabolism and potentially causing disease or death.
Cell size can significantly affect the process of waste removal and the overall survival of a cell. The surface area to volume ratio (SA:V) is crucial for efficient waste elimination and nutrient intake. As a cell grows larger, its volume increases faster than its surface area, leading to a lower SA:V ratio. This decrease in ratio means that there is less surface area available for wastes to be expelled relative to the volume of the cell that produces the waste.
Moreover, the distance traveled by substances inside the cell becomes greater in larger cells, slowing down the diffusion rate. Given that a cell's metabolism and the elimination of waste products are critical for its health, cells have evolved to be small or to have specialized shapes that maximize surface area, thus ensuring efficient exchange with their environment. Excessive accumulation of waste products can be toxic and interfere with cellular metabolism, potentially leading to cell death or diseases like cancer and cardiovascular disease.
Ultimately, to maintain a healthy balance and ensure survival, cells need to be able to manage their waste efficiently, which is facilitated by an optimal size and shape that supports rapid transport of materials across the cell membrane.
In mice, black coat color is dominant to white coat color. in the pedigree below, mice with a black coat are represented by darkened symbols, and those with white coats are shown as open symbols. part a using allele symbols b and b, determine the genotypes for each mouse.
Which type of coal is found closest to the surface?
The process by which plants take carbon out of the atmosphere is called cellular respiration. photosynthesis. diffusion. combustion.
Answer:
Photosynthesis
Explanation:
Plants remove carbon dioxide from the atmosphere through the photosynthesis process, returning only oxygen to the environment at the end of the process.
Photosynthesis is the process by which plants draw their food from light energy. In order for the plant to produce the energy necessary for its survival, it absorbs carbon dioxide and uses it to produce glucose, which is a carbohydrate used as a source of energy. All carbon dioxide that is not used in this conversion ends up being degraded by the plant.
What is the serosa?
A. The outermost of the two middle layers of the wall of the GI tract
B. The outer layer of the wall of the GI tract
C. The innermost of the two middle layers of the wall of the GI tract
D. The inner layer of the wall of the GI tract
Which best describes the nature of photosynthesis?
It is an energy-attracting process.
It is an energy-building process.
It is an energy-releasing process.
It is an energy-storing process.
Answer:
D
Explanation:
will you find it in your heart to give me brainliest
Use your periodic table of elements. Take any element of your choosing (from period 4 or above) and answer the following questions:
( I choose silicon)
What is the element's name and symbol? Is it a metal, nonmetal, or metalloid? Which family does it belong to? How many protons, neutrons, and electrons does its neutral atom have?
Thanks!
Answer:
What is the element's name and symbol?
Potassium (K)
Is it a metal, nonmetal, or metalloid?
Metal.
Which family does it belong to?
19 Protons, 20 Neutrons, 19 electrons
How many protons, neutrons, and electrons does its neutral atom have?
Alkali Metals
Explanation: Trust me, I'm in flvs and got full credit for this section of my 3.02 exam.
5. What type of molecule is represented by the model below? (2 points)
Carbohydrate
Steroid
Fat
Nucleic acid
Answer:
Fat
Explanation:
A fat molecule is an ester made from esterification reaction between glycerol & fatty acid.
Fatty acids have a long aliphatic chain and a terminal carboxylic acid (-COOH) group while a glycerol molecule is a 3 carbon compound with each carbon being attached to a hydroxyl (-OH) group. When carboxylic acid (-COOH) group of fatty acid reacts with hydroxyl (-OH) group of glycerol an ester is produced which is known as triglyceride and some residual water is also released in the reaction. To be more specific, in esterification reaction, - OH of hydroxyl (-OH) group of glycerol and -H of carboxylic acid (-COOH) group of fatty acid react to form ester bond between the two & release water.
Fat is a type of triglyceride. There are two types of triglycerides (1) Fats & (2) Oils.
Research shows that Mount Everest grows an average of 4 millimeters each year. How many years will it take to grow 720 millimeters
Answer:
180 years.
Explanation:
To calculate this we will need to make a very simple calculation, called the "rule of three", which is a calculation used to find the ratio of three factors.
If we look at the question above, we will see that Mount Everest grows 4 millimeters per year (so in our calculation we will use the ratio 4 = 1), but we don't know how many years ago Mount Everest will grow 720 millimeters (so in our calculation we will use the proportion 720= x).
This way we will have the calculation:
4 = 1
720 = X
From this, we will imagine a diagonal line and multiply the values at the end of each line. This way we will have:
4 x X = 1x 720
As a result we will have:
4X = 720
Now we will move all numbers to one side and all letters to the other side. Since the number 4 is multiplying the letter X, it will move to the other side dividing the 720. So we have:
X = 720/4.
As a result we will have:
x = 180 years.
The enzyme glucose oxidase isolated from the mold penicillium notatum catalyzes the oxidation of β-d-glucose to d-glucono-δ-lactone. this enzyme is highly specific for the β anomer of glucose and does not affect the α anomer. in spite of this specificity, the reaction catalyzed by glucose oxidase is commonly used in a clinical assay for total blood glucose –that is, for solutions consisting of a mixture of β-d-glucose and α-d-glucose. what makes it possible for this test to measure total blood glucose?
Phospholipid tails are hydrophilic and are attracted to water true or false
Answer:
False.
Explanation:
Phospholipid tails are hydrophobic, which means that they are repelled by water.
Thus, each phospholipid contains a hydrophobic portion (tails) - represented by fatty acids - and a hydrophilic portion (head) - corresponding to the phosphate group and its associated molecules. A notable fact is that, when placed in water, the phospholipid molecules can assume the shape of a sphere, known as micelle: the polar, hydrophilic portions are distributed in the periphery, while the hydrophobic tails, the tails, are in the inside the micelles away from the water.
Phospholipids are amphipatic molecules composing cell membranes. Their heads are hydrophilic, while their tails are hydrophobic. The statement phospholipid tails are hydrophilic and are attracted to water is false.
What are phospholipids?
Phospholipids are amphipathic molecules arranged in cell membranes. They have
hydrophilic heads facing the exterior and the interior of the cellshydrophobic tails that arrange against each other in the interlayer space.In the membrane, phospholipids can easily change places with other lipids by lateral diffusion in the same layer.
They can also diffuse transversally to the other layer but not as easily as lateral diffusion.
There are also other lipidic movements as rotational diffusion that imply the rotation of the molecule.
The statement Phospholipid tails are hydrophilic and are attracted to water is false. Tails are hydrophobic and reject water.
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"what type of digestion involves the gastric mill? do rats accomplish that type of digestion in their stomachs?"
Summarize why the extinction rate is greater now than in the past biology
Some researchers suggest that poor regulation of the brain's _____ may lead to panic attacks, which cause the limbic system to become overstimulated.
Final answer:
Researchers believe that dysregulation of the limbic system could lead to panic attacks due to its role in managing emotions and the fight-or-flight response, involving key structures like the amygdala and hippocampus.
Explanation:
Some researchers suggest that poor regulation of the brain's limbic system may lead to panic attacks, which cause the limbic system to become overstimulated. This complex network within the brain is responsible for regulating emotions and behaviors linked to fear, motivation, and memory formation. The amygdala and the hippocampus are key structures within the limbic system that play significant roles in emotional processing. An overactive amygdala can result in heightened fear responses, while alterations in hippocampal volume have been observed in mood disorders. Additionally, the hypothalamus, also part of the limbic system, has outputs that travel through the medial forebrain bundle to influence the autonomic nervous system and regulate stress hormone release.
which is of the following is the best example of kinetic energy
A. A flagpole standing in a courtyard
B. A Motorcycle Speeding up on the highway
C. A swimmer getting ready to dive into a pool
D. A Turtle sunning itself on a big rock
In addition to secreting orexin, the ________ monitors levels of the body's other appetite hormones.
a. hippocampus
b. cerebellum
c. hypothalamus
d. amygdala
"who defined stress as, "the response of the body to any demand, whether it is caused by, or results in, pleasant or unpleasant conditions""
If you made a change in the promoter sequence in the dna that inactivates the promoter, what would happen at the rna level?
RNA and DNA are which type of organic compound
Nucleic acids are polymeres composed of several monomers known as nucleotides. RNA and DNA are Nucleic Acids. Option C
What are nucleic acids?
Nucleic acids are large molecules composed of monomers named nucleotides attached to each other by covalent bonds.
These polymers are DNA and RNA, and their nucleotides are composed of nitrogenated bases, sugar groups, and phosphate groups.
DNA and RNA vary in
nitrogenated bases (DNA is composed of adenine, thymine, guanine, and cytosine. RNA is composed of adenine, uracyl, guanine, and cytosine)sugar (DNA sugar is a deoxyribose. RNA sugar is a ribose)RNA and DNA are Nucleic Acids.
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Complete question
RNA and DNA are which type of organic compound
a) carbohydrate
b) lipid
c) nucleic acid
d) protein
In the prokaryote
b. subtilis, the rna polymerase holoenzyme binds to a set of promoters when nutrients are readily available, and to a different set of promoters under conditions of nutrient deprivation. the ability of the holoenzyme to bind different promoters under these conditions involves a switch of one subunit. remembering the functions of the rna pol holoenzyme subunits discussed in class, which subunit is most likely to enable this change in promoter binding?
Ruth has a garden in front of her house. She waters the plants every morning. After some time, the water from the plants and soil evaporate. What is the correct term used for describing this phenomenon? A.precipitation B.condensation C.soil evaporation D.evapotranspiration
Answer:
evapotranspiration
Explanation:
Steven wants to build an ornamental fish pond in his garden. The expert at the garden center said he must get an air pump to ensure that the water is oxygenated. What is the correct term for a body of water that is devoid of oxygen? A.hypoxic B.acerbic C.anoxic D.aerobic E.eutrophic
Explain the different preparations of cocaine and how they are used.
A community health nurse is using the dietary reference intakes (dris) as a guide while developing an education presentation about nutrition for a community group. how will the use of the dris be helpful in developing this presentation?