Answer:
hope it helps..
Explanation:
During the third trimester, the fetus continues to grow in size and weight. The lungs are still maturing. The fetus starts to position itself head-down. By the end of the third trimester, the fetus is about 19 to 21 inches long and weighs about 6 to 9 pounds.
What is DNA and what is it for
Scientists reported that a fungal pathogen, may negatively a!ect the growth of soybeans (Glycine max). Soybean growth decreased during three years of high rainfall, and the soybean roots were poorly developed. Close relatives of R. anaerobis are plant pathogens and grow in the soil. A lectin-like protein was found in the soil around the soybean roots. is protein may have been secreted by the fungus. Lectins induce mitosis in some root apical meristem tissues. In many instances, rapid cell divisions weaken plant tissues.You have been asked to investigate whether the fungal pathogen lectin a!ects the number of cells undergoing mitosis in a di!erent plant, using root tips.• What is your experimental hypothesis? Your null hypothesis? Are these the same?• How would you design an experiment with onion bulbs to test whether lectinsincrease the number of cells in mitosis?• What would you measure, and how would you measure it?• What would be an appropriate control for your experiment?Your teacher will provide you with untreated and lectin-exposed roots. You should be comfortable identifying cells in mitosis or in interphase before you begin examining the chromosome squashes.
Answer:
What is your experimental hypothesis?
Experimental hypothesis: If we introduce lectins into the root systems of plants, then they will cause rapid cell division, mitosis, to begin in the root apical meristem tissues which will weaken plant tissues.
Your null hypothesis?
Null hypothesis: If we introduce lectins into the root systems of plants, then there will be no initiation of mitosis in the root apical meristem tissues and the plants will not weaken as a result.
Are these the same?
These are not the same, the experimental hypothesis states that lectin will have an effect on the rate of cell division within the plants which will cause the plant to be weaker, however, the null hypothesis states that lectin will have no effect on the rate of cell division and therefore will not affect the plants overall strength. The null hypothesis is the opposite of the experimental and we are testing the experimental hypothesis to decide whether to accept or reject the null hypothesis.
How would you design an experiment with onion bulbs to test whether lectins increase the number of cells in mitosis?
Assuming these onion bulbs have roots, we would get multiple untreated onions and isolate them by putting them into a controlled environment within a lab by using soil obtained from a store, steady LED light from the room, watered 2 times a day with 2 cups (480 ml) each time and finally isolated the same lab room. The only testable variable in this experiment will be whether the onions are given the lectin or not. In one group we would have the control group, the water they are given would be purely distilled water, however, in another group we would have the experimental group, which would be treated with water mixed with lectin. We are looking to study if there is a change, more specifically an increase, in the cell division of the onion within the treatment/experimental group.
What would you measure, and how would you measure it?
We would need to observe pictures taken of the onion cells under a microscope in order to count the cells in each phase of mitosis. If more cells are visibly undergoing mitosis, and more are present in the picture (density), then we can know that the lectin is causing an increase in rapid cell division. We will compare the amount of cells in each phase with that of the onion which was used as a control.
What would be an appropriate control for your experiment?
An untreated onion that is given distilled water as a treatment, a placebo, which allows us to compare no treatment to the effects of the treatment in the experimental group.
Explanation: I hope the answers are very thorough :) you're welcome future AP Bio students.
If the experiment goes fine, the roots of Group-1 will more denser than the control group.
Experimental hypothesis:
If we introduce lectins into the root systems of plants, then it will increase , mitosis, which will weaken the plant tissues.
Null hypothesis:
If lectins is introduced into the root of plants, then there is no initiation of mitosis in the root apical meristem and the plants will not weaken.
Experimental hypothesis and Null hypothesis are not the same because both statements are opposite.
The onion bulbs with roots, will be divided into 2 groups
1. Onion bulb's liquid media with lectin.
2.Onion bulb's in water only.
The onion bulbs with water apparatus will use as control. The density of the cell will be measured under the microscope.
Therefore, if the experiment goes fine, the roots of Group-1 will more denser than the control group.
To know more about Null hypothesis,
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Chewing a saltine cracker.
physical
chemical
Answer:
Physical
Explanation:
Your not chemically chewing a cracker, you physically moving your jaw to chew the cracker
Hope this helped, Have a Great Day!!
A small, leafy branch is cut from a tree. After some hours, the stem of the branch remains firm . Suggest an explanation for this
Answer:
Explanation:
When a branch is detached from a tree, water is being lost through the porous open area. After some time, a callous formation of new tissues starts to appear on the open surface to terminate further loss of water. The osmotic pressure in the leaves gets reduced as they no longer contain enough water, while the stem is being filled with water due to the network of capillaries.
What are these species BowHead and Omura a type of
Answer:
The bowhead whale (Balaena mysticetus) belongs to the Balaenidae family and is the only living representative of the Balaena genus. The Omura whale (Balaenoptera omurai) had been defined as a new species in 2003 and quickly thereafter as an ancient basal lineage to a clade of Bryde / ein whale.
Conjecture what would happen if a primate infant did not possess your chosen primate hand features. Answer this question with the survivability of the infant in mind
Answer:
Where the primate infant did not possess primate hand features, it will not be able to feed itself. For example, a monkey cannot survive without its grasping hands. It uses them to feed itself. So if an infant monkey does not possess the primate hand features, its survival will be greatly hampered.
Explanation:
Ordinarily, primates (including humans) have five fingers on each of their hands and five toes on their feet. Most primate species have fingernails instead of claws, and they have touch-sensitive pads on each of their digits. The hands and feet of all primates are designed for grasping, with the only exceptions being humans. Human beings feature deep perceptions that differentiate them from other primates.
Can I pls get help !!
Answer:
I am not certain but I think it's DNA to RNA to protein may be wrong but I think that's the answer
Answer:
C. DNA to RNA to protein
Explanation:
This question is asking about protein synthesis. Let’s analyze the process.
It begins in the nucleus. DNA is too large to pass through the nucleus, so something has to be done. DNA is “unzipped” using an enzyme called polymerase. Nucleotides attach to create a new strand of messenger RNA, in the process of transcription. The mRNA is small enough to pass through the nucleus.
So the first step is DNA to RNA.
Then, the mRNA makes it way to the ribosome. Here, translation takes place. Transfer RNA reads the mRNA and matches a set of three bases (codon) to an anticodon. The tRNA attaches amino acids based on the codon. A protein will form and bend into a specific shape.
So, the next step is RNA to protein.
Overall, the process is DNA to RNA to protein. Choice C is correct.
In crime scene, as investigator you saw an alleged almost dried semen in the bedsheets at the crime scene. How will you collect the specimen?
Answer:
an investigator will often use a black light to scan an area for traces of bodily fluids left at the crime scene. if there’s a substance that resembles semen or blood, they will often times apply a spray if it is dry and use a cotton swab to collect it in a vial to test back at the lab for dna evidence.
Explanation:
When a bee visits a flower for sweet, sweet nectar, the plant's gametes are also spread to anoher plant. What kind of symbiotic relationship is this?
Answer:
Mutualism
Explanation:
Mutualism is a type of symbiotic relationship in which the two species of organisms involved benefit from one another i.e. the actions of one benefits the other.
In this question, a bee is said to visit a flower for sweet nectar, however, in the process of feeding on the flowers nectar, the plant's gametes are also spread to another plant by the bee. This is a type of MUTUALISTIC RELATIONSHIP because the plant is beneficial to the bee by providing food (nectar) while the bee also helps the plant by helping it pollinate.
Does the hallux (big toe) of Carpolestes have more synapomorphic features shared with the euprimate, or more symplesiomorphic features shared with the tree shrew? Provide at least one feature you used to make your decision.
Note: You will find the missing image needed to answer the question in the attached files.
Answer:
The hallux (big toe) of Carpolestes has synapomorphic features shared with the euprimate.The nail on the distal phalange is an example of a synapomorphic feature.Explanation:
The symplesiomorphic features are those shared by two or more organisms that inherited it from a common ancestor, but this trait is older in relation to those traits exhibited in other descendants of that same ancestor.The synapomorphic features are those shared by two or more organisms that inherited it from a common ancestor, and which evolved for the first time in it.There are more synapomorphic features shared with the euprimates. The nail on the distal phalange of the big toe and euprimates might be considered as a synapomorphic feature. It is quite different from the same nail of the tree shrew.
How many protons and electrons does Neon have???
Muscular dystrophy is a neuromuscular disease that weakens a person's muscles. Which main body systems would be involved in this disease? (1 point)
Item 2
nervous, muscular, and respiratory
Item 3
nervous, muscular, and vascular
Item 4
nervous, muscular, and urinary
Item 5
nervous, muscular, and skeletal
Answer:
nervous, muscular, and vascular
Explanation:
Muscular dystrophy (MD) is a group of inherited genetic conditions that cause progressive weakness and the loss of muscle mass. MD is caused by mutations in genes responsible for muscle function. MD not only leads to problems in the muscular system but also may cause disorders of the central nervous system and the circulatory system (especially the heart). For example, Becker muscular dystrophy is a condition associated with arrhythmias and cardiomyopathies. Moreover, MD may lead to vision and speech problems, and result in irreversible structural brain changes.
Answer:
Nervous, muscular and skeletal
Explanation:
What is the group number for Calcium and does it have cations or anions???
Answer:
the group number is 2
Explanation:
it is cations
Answer:
A Calcium is in group 2
explanation:
because it forms only the Ca 2+ ion. B Dihydrogen phosphate is the H 2PO 4 − ion (Table 2.4 "Common Polyatomic Ions and Their Names"). Two H 2PO 4 − ions are needed to balance the positive charge on Ca 2+, to give Ca(H 2PO 4) 2.
why should we care our sense organ
Answer:
Our sense organs are very important for us as they allow us to connect with the world. Our five sense organs a
What would be the best diet to your knowledge?
Specialized processes, or changes, that organisms have or make in order to survive in an environment are called A) adaptations B) developments C) evolutions D) growths E) maturations
The answer is adaptation
Why could organisms that use a K-selected life strategy be more at risk when environmental conditions change?
Answer:
K-selection organisms have the maximum chance of surviving in the surrounding where the number of organisms is near the carrying capacity, however, the lack of offspring makes them endangered species.
Explanation:
K-species can give the offspring with the great possibility of surviving until mature.
K-selection is the most frequent in big animals, that have a long life span, and many generations that meet. K-selection organisms give less offspring but with a stronger organism.
However, these organisms are more endangered, as they tend to have fewer offspring, so their populations cannot recover as quickly from disorders such as excessive hunting or fire.
Describe the difference between normal vision and colorblindness. Do individuals with red/green colorblindness have difficulty seeing at night? Why or why not?
Answer:
Color vision is possible due to photoreceptors in the retina of the eye known as cones. These cones have light-sensitive pigments that enable us to recognize color. Found in the macula (the central part of the retina), each cone is sensitive to either red, green or blue light (long, medium or short wavelengths). The cones recognize these lights based on their wavelengths. Normally, the pigments inside the cones register different colors and send that information through the optic nerve to the brain. This enables us to distinguish countless shades of color. But if the cones don't have one or more light-sensitive pigments, they will be unable to see all colors.
Most people with color vision deficiency can see colors. The most common form of color deficiency is red-green. This does not mean that people with this deficiency cannot see these colors altogether, they simply have a harder time differentiating between them, which can depend on the darkness or lightness of the colors.
Another form of color deficiency is blue-yellow. This is a rarer and more severe form of color vision loss than just red-green deficiency because people with blue-yellow deficiency frequently have red-green blindness, too. In both cases, people with color-vision deficiency often see neutral or gray areas where color should appear.
People who are totally color deficient, a condition called achromatopsia, can only see things as black and white or in shades of gray. Color vision deficiency can range from mild to severe, depending on the cause. It affects both eyes if it is inherited and usually just one if it is caused by injury or illness.
Explanation:
Brainliest please?
What jobs do cells have?
Answer: Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions.
Explanation:
Which of the following processes play a role in introducing both water and carbon in the earth's cycles? A) photosynthesis and respiration B) condensation and nitrogen fixation C) burning of fossil fuels and forest fires D) desertification and condensation
Answer:
A) photosynthesis and respiration
Explanation:
"The gross primary productivity of a meadow in southeastern Kansas is found to be 38,000 kcal/m 2 . Respiration which is measured by the amount of CO 2 released is 13,500 kcal/m 2 , what is the net primary productivity for this ecosystem, in kcal/m 2 per year
Answer:
Net primary productivity = 24,500 kcal/m²
Explanation:
Given:
Gross primary productivity = 38,000 kcal/m²
Respiration amount = 13,500 kcal/m²
Find:
Net primary productivity
Computation:
Net primary productivity = Gross primary productivity - Respiration amount
Net primary productivity = 38,000 - 13,500
Net primary productivity = 24,500 kcal/m²
BEST/FIRST ANSWER GETS BRAINLYEST!!!! PLEASE HELP
Which evidence shows that landmasses had different climates millions of years ago and supports the theory of
continental drift?
Ⓐ coal fields in several continents
Ⓑvolcano formation
Ⓒtropical plant fossils on
ⒹArctic islands
folded mountains in Africa and South America
Why is a fern a vascular plant
Answer:
Ferns are seedless, vascular plants. They contain two types of vascular tissue that are needed to move substances throughout the plant. Evolutionarily, this addition of vascular tissue to plants is what allowed ferns to grow up and out rather than just spreading along the ground.
Explanation:
Could you please mark me as the brainliest answer
the widows peak that is seen in some people is an example of what type of trait?
A. single-gene
B. polygenic
B. abnormal
Answer:
A. single-gene
Explanation:
It is controlled by a single gene that has two alleles. The allele for a widow's peak is dominant over the allele for a hairline with no peak.
The zygote of an organism has 10 pairs of homologous chromosomes. The total number of chromosomes in the germ cell of the organism is _____________. (enter numeric answer below)
If sunlight and a radio wave are both traveling through water, compare the speed of each wave. Explain how you know.
Answer:
Speed of both will be decreases when they travel through the medium of water.
Explanation:
Both sunlight and radio wave has the same speed in vacuum but both speed will be decreases when they travel through the medium of water because the consistency of water is more than air which make hard to travel for sunlight and radio wave. The speed of sunlight is slightly decreases but the radio wave can't go too far in the water and finally stops so we can say that sunlight can travel through water but radio wave none.
How are plant cells different from animal cells?
(they convert sunlight into energy, they take in material through their cell membrane, or they use energy to grow and reproduce)??
Answer:
one has a cell wall and tge other doesnt
Non-steroidal anti-inflammatory drugs (NSAIDS) block the actions of the COX enzymes and their production of eicosanoids from ___.
Answer:
Arachidonic acids
Explanation:
Non-steroidal anti-inflammatory drugs (NSAIDs) are drugs used due to their analgesic, anti-inflammatory effects.
It inhibit cyclooxygenase (COX) enzyme that takes part in the biosynthesis of prostaglandins (PGs) and thromboxane (TX) and the production of eicosanoids.
Eicosanoids are made by the enzymatic or non-enzymatic oxidation of arachidonic acid or from other polyunsaturated fatty acids (PUFAs) that are close to arachidonic acid which are 20 carbon units in length.
They are important cell signaling molecules that inhibit inflammation, allergy, fever,regulate abortion of pregnancy and normal childbirth, regulating cell growth.
Order the terms from simplest to most complex:
paired bases, DNA molecule, gene, chromosome cell, arm, person
Answer:
paired bases, DNA molecule, gene, chromosome, cell, arm, person.
Explanation:
right on edge. found on quizlet
Place the following statements in the correct order as they occur in DNA replication. (5A)
1. Appropriate free nucleotides are added to the complementary DNA
strands.
2. DNA unwinds.
3. DNA coils up.
4. The hydrogen bonds are broken between the nitrogenous bases.
Answer: The answer is C.
Explanation: I jus got done taking the test. Also remember the first start is breakin through and tearing apart the hydrogen base bonds, then they’re glued so they do not coil back up.
The correct order of replication are DNA unwinds then the The hydrogen bonds are broken between the nitrogenous bases, and Appropriate free nucleotides are added to the complementary DNA strands. DNA coils up.
What is DNA replication?DNA replication is the process through which cells make copies of the genome's DNA. A cell must first copy (or duplicate) its entire genome before it can divide, ensuring that each daughter cell has a complete genome upon division.
One of DNA's most astounding tricks is likely DNA replication. If you stop to think about it, every cell has all the DNA required to create every other cell.
Therefore, DNA is a molecule that can be copied to create almost exact duplicates of itself. Considering that there are almost three billion base pairs in DNA that need to be copied, this is even more astounding. DNA polymerases, which are molecules dedicated solely to copying DNA, are also used in replication.
Therefore, The correct order of replication are DNA unwinds then the The hydrogen bonds are broken between the nitrogenous bases, and Appropriate free nucleotides are added to the complementary DNA strands. DNA coils up.
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