Answer:
A
Explanation:
A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms. These electrons are simultaneously attracted by the two atomic nuclei. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.
Answer: The answer is A Covalent bonds are formed when atoms share one or more electrons
Explanation:
Explain why DNA Sequencing proves that all species have a common ancestor
Answer:
Below
Explanation:
The reason why we can conclude that all species have common ancerstory is that all the species have several same base pairs. Here are a few listed:
A-G-G-C
As well as this later on:
C-C-A-A-C-C
Because this strand of DNA has several common base pairs, we can conldude that the species have common ancestory that made it this way.
Hope this helps!
Which answer best illustrates evolution by natural selection?
(2.9 points)
A. Ancestors' legs grew longer from climbing to escape predators.
OB. Ancestors that had longer legs could not produce more offspring.
O c. Ancestors wanted longer legs to escape predators and therefore grew longer legs
OD. Ancestors with longer legs escaped predators more easily and lived to produce more offspring.
Answer: A
i know this because i have taken this before
describe the life cycle of a bean beetle
Answer:
The larvae of this species feed and develop exclusively on the seed of legumes (Fabaceae) hence the name bean beetle. The adults do not require food or water and spend their limited lifespan (1–2 weeks) mating and laying eggs on beans. ... Pupation is the complete metamorphosis of the larval maggot to a winged adult.Explanation:
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Match each of the following terms with its description. 1. Arteries a) Tiny, thin-walled blood vessels that connect the smaller arteries to venules 3. Veins 4. Venules 5. Arterioles 2. Capillaries b) Thin-walled blood vessels that are less elastic than arteries c) Thick-walled, muscular, flexible tubes that carry oxygenated blood away from the heart to the arterioles d) Small arteries that deliver blood to capillaries e) Small vessels that connect the capillaries to the veins
Answer:
Arterioles - D
Arteries - C
Veins - B
Capillaries - A
Venules - E
Explanation:
This question is describing the blood vessels that make up the circulatory system. The blood vessels with their accurate description are as follows:
- ARTERIES: Arteries are the most elastic and thick-walled blood vessels that functions to carry blood away from the heart using great pressure. Arteries are muscular, flexible tubes that carry oxygenated blood away from the heart to the arterioles.
- VEINS: Veins are blood vessels that carry deoxygenated blood back to the heart. Veins have a thin wall and are less elastic in comparison with arteries.
- CAPILLARIES: Capillaries are smallest blood vessels designated to connect the smaller arteries or arterioles to venules. They are also thin-walled.
- ARTERIOLES: Arterioles are small arteries or branches of an artery that connects the arteries to capillaries. Arterioles deliver blood to capillaries.
- VENULES: Venules are tiny veins or branches of a vein that connects the veins to the capillaries. Venules deliver blood from capillaries to veins.
Which of the following words would you probably NOT use to describe the scientific process?
.control
.organized
.data
.disorganized
The words that would probably not used to describe the scientific process is disorganized, i.e., option D.
What is scientific process?The scientific method is an epistemological method of acquiring knowledge that has been used in science since at least the 17th century.
The words that would probably not used to describe the scientific process is disorganized.
Thus, the correct option is D.
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Applying Concepts Your friend is playing a song on a piano. Whenever your friend hits a certain key, the lamp on top of the piano rattles. Explain why the lamp rattles.
Answer:
The lamp rattles because close resonant frequency.
Explanation:
The phenomenon of increased amplitude is known as resonance when the frequency of a periodically applied force is equal to or close to the natural frequency of the system it affects. When a resonant frequency oscillating force is applied to a dynamic system, the system oscillates with greater amplitude than when the same force is applied at non-resonant frequencies.
Resonant frequencies or resonance frequencies of the system are frequencies when the response amplitude is at a relative maximum. Due to the storage of vibrational energy, small periodic stresses at a resonance frequency of the system can cause significant amplitude oscillations in the system.
Thereforee, the lamp rattles because close resonant frequency.
Un instructor desea preparar un experimento sobre movimiento armónico simple. Sólo dispone de una masa de 2 kg pero tiene una colección de resortes. ¿Qué constante elástica, en N/m, debe elegir para tener un período de 2 s?
Answer:
Constante de resorte, k = 19.745 N/m
Explanation:
Dados los siguientes datos;
Masa, m = 2 kg
Periodo, T = 2 segundos
Para encontrar la constante del resorte, k;
[tex] Period, \; T = 2 \pi \sqrt {\frac {m}{k}} [/tex]
Dónde;
T es el período. m es la masa del objeto. k es la constante del resorte.Haciendo k el tema de la fórmula, tenemos;
[tex] k = \frac {(2 \pi )^{2}m}{T^{2}} [/tex]
Sustituyendo en la fórmula, tenemos;
[tex] k = \frac {(2 * 3.142)^{2} * 2}{2^{2}} [/tex]
[tex] k = \frac {6.284^{2} * 2}{4} [/tex]
[tex] k = \frac {39.49 * 2}{4} [/tex]
[tex] k = \frac {78.98}{4} [/tex]
Constante de resorte, k = 19.745 N/m
The protection and wise use of natural
resources is called?
Answer:
Hey mate......
Explanation:
This is ur answer......
The wise use of our natural resources is called conservation. The choice not to use our natural resources is called preservation.
Hope it helps!
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Guys help me I know you guys are smart so please help me:)
Answer:
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"Draw a pedigree for hitchhiker’s thumb. Your pedigree should cover at least two generations and include both dominant and recessive forms of the trait. Label the pedigree with genotypes, using the letter H to represent the dominant allele for the trait and the letter h to represent the recessive allele."
I'm confused on the part about having two generations. How do I set up the pedigree?
Answer and Explanation:
First, you need to know how to interpret a pedigree representation.
Family members→ Individuals are represented with geometrical figures.
→ Males are squares
→ Females are circles
Trait/Phenotype→ Healthy/normal/not affected individuals are represented with empty figures
→ Affected/mutated individuals are represented with solid black figures
Generations→ Each file is represented with a roman number, indicating the Generation.
Now, what we need to do is to draw a pedigree for a hitchhiker’s thumb. We know that this is an autosomal dominant trait, which we will represent with an H. No hitchhiker's thumb is the recessive trait, and it will be represented with an h.
Our pedigree should cover at least two generations and include both dominant and recessive forms of the trait.
We can cross two heterozygous individuals, Hh, who are the first generation in our pedigree. This cross will result in a woman and a man with No hitchhiker's thumb, another man with a hitchhiker's thumb, HH, and another woman with a hitchhiker's thumb, Hh. These individuals will represent the second generation in the pedigree. Finally, we can cross the man with No hitchhiker's thumb, hh, with a woman who does not have a hitchhiker's thumb either, hh. And the woman with a hitchhiker's thumb, Hh, with a man with a hitchhiker's thumb, HH. The result of these crosses will be the third generation.The representation would be like following,
I → First-generation: First cross
Man Hh (1) Woman Hh (2)II → Second-Generation: F1 and second crosses
Man hh (3) x Woman hh (4)Woman hh (5)Man HH (6)Woman Hh (7) x Man HH (8)III → Third-Generation:
A boy (9) and a girl (10) hhA girl (11) HHYou will find this pedigree in the attached files. In this example, we included three generations. The first one belongs to the grandparents, the second one to parents, aunts/uncles, and the third one to grandchildren.
If you draw another pedigree, remember to include
the figures representing males and females, color and H/h representing the phenotype, Roman numbers representing the generations, and optional, numbers naming each member.
An object at ___ stays at ____ or an object that is ____ at a _____ in a straight _____ keeps moving at that _____ unless another _______ acts on it.
Answer:
an object at rest stays at rest or an object that is moving at a velocity in a straight line keeps moving at that velocity unless another force acts on it
What would be the complimentary side of this DNA molecule?
TAG CCA TTG CGT GCC TGG CAAT
The _____ of a species is usually the result of predation, competition, and other types of interaction between species.
Answer: Realized Niche
Explanation:
Realized niche is also referred to as Post Competitive niche and can be defined as a thriving environmental area created by a group of organisms to survive from an exsisting Faundermental niche where interactions (predation, competition, light, water,food) with other organisms were limited and competed for.
For example. In a tree( Faundermental niche) which houses different species of birds, In order to survive, each specie of the birds will create a realized niche so as to survive from predation, competition, light etc which the whole tree provides.
Why does the kidney need 1 million nephrons instead of one whole unit to carry out its function
If you conducted the analysis portion of Experiment 2, you calculated
the rate at which the percentage of fish with a complete pelvis
decreased in that ancient lake. Do you think the same rate of change
would apply to modern fish populations?
Answer:
ibk- xuqe- wup
only show type person come
Not really sure about this answer so can someone give me the correct one
what does a root hair cell do
Answer:
Root hair cells (black arrow pointing at one of the root hair cells) are single tubular root cells. Their distinctive lateral elongation increases the surface of exchange between the plant's root system and the soil. The main function of root hairs is the uptake of water and nutrients from the rhizosphere.
what animal is the descendant of Gilmoreosaurus
Answer:
Dinosaurs!
Explanation:
Which is the main material in a solar cell?
A. carbon
B. phosphorus
C. silicon
D. boron
Answer:
C.Silicon
Explanation:
By far, the most prevalent bulk material for solar cells is crystalline silicon (c-Si), also known as "solar grade silicon". Bulk silicon is separated into multiple categories according to crystallinity and crystal size in the resulting ingot, ribbon or water.
Answer:
C. silicon is the main material in a solar cell .
hope it is helpful to you
helppppppppppppp im stuck
Answer:
Ecosystem
Explanation:
Ecosystems are the largest organizational level found in one coral reef
List the three items that must be included in the definition of mass extinction
Explain why some mutations cause differences in phenotype and others do not?
¿Cómo defines a una Célula Haploide?
Answer:
La mitad de cromosomas.
Explicación:
Las células haploides se refieren a aquellas células que tienen la mitad de cromosomas. Estas células haploides se forman debido a la división celular de la meiosis. En la división celular de la meiosis, una célula madre se divide en cuatro células hijas que tienen la mitad de cromosomas. Estas células haploides están presentes en los espermatozoides de los gametos masculinos y femeninos, que se fusionaron formando células diploides que tienen el doble de cromosomas. El cigoto formado debido a la fusión de espermatozoides y óvulos son de naturaleza diploide.
Why do you think leaves have stomata on their underside only? Explain.
For the following nitrogen base sequence, write the complimentary sequence on the line provided.
A – T – C – C – T – A – G – A – A
_________________________
Answer:
TAGGATCTT
Explanation:
a - t
c - g
A __________ is an example of a signal molecule that can bind to an intracellular receptor and thereby cause a gene to be turned on or off. a protein b glyceride c nucleic acid d steroid e carbohydrate
Answer:
D. steroid
Explanation:
Intracellular receptors are a type of receptors located inside the cell, specifically in the cytoplasm or nucleus. When intracellular receptors are activated by ligands called SIGNALLING MOLECULES, they change shape and regulate genetic expression in the nucleus i.e. they induce turning on and off in a gene.
However, signalling molecules that activate intracellular receptors are usually hydrophobic hormones because they need to easily diffuse through the cell membrane and bind to the receptors located internally. Example of these hydrophobic signal molecules are STEROIDS.
Can someone help me pls
Answer:
respiratory and circulatory digestive and excretorydigestive and circulatory nervous and muscularTrue or False; Carbohydrates and Lipids are organic, contain CHO and are both forms of energy
Assess It! #4 Which is the correct combination for the photosynthesis equation? (not balanced) A. H2O + -> CO2 + O2
B. O2+H2O -> sugar +energy
C. CO2 + H2O +☺ -> Sugar+ energy
D. ☺ + H2O -> H2O+ sugar
stions
Describe what a muscle fiber looks like and what it
can do.
Answer:
Smooth muscle fibers have an oblong shape, much like a football. They’re also thousands of times shorter than skeletal muscle fibers. Similar to skeletal muscles, cardiac muscles are striated. They’re only found in the heart. Cardiac muscle fibers have some unique features.
Explanation: