What does heredity mean?
________ is the area at the headwaters of a stream where most of the sediment is derived.
a virus is unlike an organism in that the virus is __________.
A virus is unlike an organism in that the virus is not considered a living organism.
Unlike organisms, viruses lack the essential characteristics of life, such as the ability to grow, reproduce independently, and carry out metabolic processes.
Instead, viruses are obligate intracellular parasites that require a host cell to replicate and carry out their life cycle. They consist of genetic material (DNA or RNA) enclosed in a protein coat but lack cellular structures or machinery.
Viruses cannot perform vital life functions on their own and are inert outside a host cell.
Their replication involves hijacking the host cell's machinery to produce new viral particles, highlighting their distinct nature from living organisms.
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In one type of dog, black spots (B) are dominant over brown spots (b) and long tails (L) are dominant over short tails (l). Complete a dihybrid cross for parents with the genotypes: BbLL × BBLl and answer the following in complete sentences.
1. Describe how you would set up a Punnett square for this cross.
2. List the likelihood of each possible offspring genotype.
3. List the likelihood of each possible offspring phenotype.
Assuming genes that assort independently, do not interact, and express complete dominance, the expected genotypes are 25% BBLL, 25% BBLl, 25% BbLl, 25% BbLL. The expected phenotype is 100% black spots and long tails
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Available data:
Two diallelic genes. One codes for spots color. The other one codes for tail length.
Spots
B is the dominant allele and codes for back spotsb is the recessive allele and codes for brown spotsTail length
L is the dominant allele and codes for long taill is the recessive allele and codes for short tailCross:
Parentals) BbLL x BBLl
Gametes) BL, BL, bL, bL BL, BL, Bl, Bl
Punnett square) BL BL bL bL
BL BBLL BBLL BbLL BbLL
BL BBLL BBLL BbLL BbLL
Bl BBLl BBLl BbLl BbLl
Bl BBLl BBLl BbLl BbLl
1. Describe how you would set up a Punnett square for this cross.
To make the Punnett square, first, you need to define the parental genotypes. Then you need to define the gametes each parent contributes.
The gametes of one parent are placed in the upper part of the square, while those of the other parent are placed on the left side.
The square is filled with a combination of gametes.
2. List the likelihood of each possible offspring genotype.
F1) Genotype
4/16 = 25% BBLL, h0m0zyg0us dominant for both genes4/16 = 25% BBLl, h0m0zyg0us dominant for B gene, heter0zyg0us for L gene4/16 = 25% BbLL, h0m0zyg0us dominant for L gene, heter0zyg0us for B gene4/16 = 25% BbLl, heter0zyg0us for both genes.
3. List the likelihood of each possible offspring phenotype.
Phenotype
16/16 = 100% dogs with black spots and long tails, B-L-.Note that the symbol - represents either a dominant or recessive allele.
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The ______ nervous system receives information from sense organs and analyzes that information.
A: Central
B: Peripheral
A male or female sex cell is called a:
A male or female sex cell is called a gamete. Gametes are produced through a specialized cell division process called meiosis.
Gametes are reproductive cells that carry half the number of chromosomes of a normal cell. In sexual reproduction, two gametes, one from each parent, fuse together during fertilization to form a zygote, which develops into a new individual. Gametes are produced through a specialized cell division process called meiosis, which reduces the chromosome number by half to ensure the offspring receives the correct number of chromosomes.
In humans, the male gamete is called sperm, produced in the testes, while the female gamete is called an egg or ovum, produced in the ovaries. Gametes are specialized cells designed for sexual reproduction and carry genetic information from the parents. They are essential for the continuation of the species and the genetic diversity of offspring.
The fusion of male and female gametes during fertilization restores the full complement of chromosomes and creates a unique combination of genetic material in the offspring. This process ensures genetic variation within a species, allowing for adaptation to changing environments and promoting evolution.
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Dolly was a female domestic sheep, and the first mammal to be cloned from an adult somatic cell, using the process of __________________.
A) DNA transfer
B) cell transfer
C) oocyte transfer
D) nuclear transfer
Answer: The correct answer for the blank is-
D) nuclear transfer.
Dolly was a female domestic sheep, and the first mammal that was cloned using an adult somatic cell ( particularly a mammary gland cell from a Finn Dorsett sheep). She was produced using a technique, which is termed as somatic cell nuclear transfer.
In this technique, the nucleus from an adult somatic cell was transferred to an unfertilized oocyte ( which was first enucleated that is nucleus was removed). After this, unfertlized egg was activated using electrical stimuli, which initiated cell division and produced Dolly.
Thus, option D) nuclear transfer is the right answer.
in order to be classified as a living thing an organism must have ?
Living organisms have different characteristics and they respond to stimuli, respire, move, dependent on the environment, reproduce, and growth.
All living organisms are made up of a large number of cells. Each cells have a nucleus and cytoplasm. If the nucleus is present in the cell is called a eukaryotic cell and if the nucleus is absent is called a prokaryotic cell. Each cell present in the living organism has a specific function.
Thus, living cells have the characteristics to reproduce, and grow organisms, and living organisms react to the environment, regulation, homeostasis, energy processing, and respiration. These characters define life.
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Which of the following best describes what happens to water molecules after they are released from plants through transpiration?
a. They will combine to form runoff and flow into rivers, lakes, and oceans.
b. They will cool and form dew, clouds, or fog through condensation.
c. They will fall to Earth in the form of rain, sleet, or snow.
d. They will undergo evaporation and change to a gas. ...?
Answer: d. They will undergo evaporation and change to a gas. ...?
Transpiration is a process of loss of excess water from the small pores present on underside of leaves. The water released by this process evaporates and converted into water vapor (gas). The water vapors formed by this process are released in the atmosphere. The rate of transpiration depends upon weather conditions, such as humidity, sunlight, temperature, and wind.
During a quiet eruption, a lava flow may set fire to and then bury everything in its path. true or false
The answer is True.
When a volcano erupts, that lava or magma it's made of liquid rock from the earth's core.
It's between 700º and 1200ºC, and it's not possible to control it.
The amount of lava depends on the volcano but, the flow will set on fire everything that touches until the flow stops and goes cooler.
Which of the following plant adaptations aids savanna plants during droughts?
a.
spines
b.
water storage
c.
growth patterns
d.
bitter taste
The correct answer is (b) water storage.
Savanna is a tropical place located in which has high temperature round year.The savanna plants had adapted many adaptation to protect themselves from drought. They adapted a water storage organ called baobab.These are long cylindrical shaped trunk used to store water in dry conditions.This adaptation was necessary to store water for the times when there is a scarcity of water.These adaptation are necessary so that the trees can regrow in the next season after drought.
Savanna plants have adaptations like water storage, spines, and bitter taste to aid them during droughts.
Explanation:Savanna plants have several adaptations to aid them during droughts. One of these adaptations is water storage. Plants like cacti have modified stems that can store water, allowing them to survive long periods without rain. Another adaptation is spines. These spines reduce the surface area of leaves, minimizing water loss through evaporation. Lastly, some plants develop a bitter taste as an adaptation. This helps deter herbivores, ensuring the plant's survival during dry periods.
what types of animal cells are most similar to undifferentiated plant cells in a tissue culture
How can a mixture of sand and water be separated?
A) Chromatography
B) Magnetic Attraction
C) With a Filter
D) Crystallization
Which one of the following characteristics of Archaea enables them to survive in extreme environments?
A.Their ability to survive on other sources of energy if the required resources are not present.
B.The presence of peptidoglycan in their cell wall, which increases their ability to thrive in extreme conditions.
C.Their highly locomotive abilities which enable them to move to suitable environments.
Which of the following statements about resource use is true?
a. The use of renewable resources has no inherent costs.
b. Resource use, whether renewable or nonrenewable, must be carefully managed to reduce the impact on the environment.
c. Nonrenewable resources are used for energy, because there are no renewable resources that can be used as a source of energy.
d. The overuse of nonrenewable resources is less environmentally damaging than the overuse of renewable resources.
The statement that is true about resource use is as follows: resource use, whether renewable or nonrenewable, must be carefully managed to reduce the impact on the environment.
How are resources effectively utilized?Resources are used by humans to supply energy for their daily needs.
Resources can either be renewable or nonrenewable depending on whether it can be replenished or not.
However, the use of resources, whether renewable or nonrenewable, must be carefully managed to reduce the impact on the environment.
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If stranded on a deserted island with no freshwater, it is not advisable to drink sea water. Why not? A) The salty snacks cause an ionic imbalance that triggers a nervous response. B) The salt in the body creates a hypertonic solution around cells, which causes water to diffuse out of cells and make them crenate. C) The salt in the body creates a hypotonic solution around cells, which causes water to diffuse into cells and make them cytolyse. Eliminate D) The salt in the body creates an isotonic solution around cells, which causes water to diffuse into and out of cells which makes them unstable.
B) The salt in the body creates a hypertonic solution around cells, which causes water to diffuse out of cells and make them crenate.
The ability of an organism to change internally or externally in relation to changes in the environment is called _____. reproduction complexity heredity homeostasis
Answer:
The correct answer is homeostasis.
Explanation:
Change in an organism internally or externally according to environmental change is called homeostasis. This ability help organism to maintain and regulate equilibrium to the outer environment to keep their vital function. There are many regulating organs or glands that help in maintaining homeostasis.
Hypothalamus located in the brain is the major organ that helps in regulating homeostasis. The homeostasis action involves common things are body temperature, blood pressure regulation and many more. however, in lower life forms, it can be regulated by localized organs or cells too.
Thus, the correct answer is homeostasis.
Which three elements make up most of the human body?
Answer:
The three elements make up most of the human body are
1. Oxygen
2. Carbon
3. Hydrogen
Explanation
The human body is made up of many different elements, but oxygen, carbon, and hydrogen these elements are present in abundance.
Oxygen: oxygen is the first major element that is present in the abundant, about 65 percent total weight of a human body is made up of oxygen. Oxygen is consumed by both inhalation and exhalation process.Carbon: It is the second most important element of the human body, about 18 percent total weight of a human body is made up of carbon.carbon is consumed by the food material.hydrogen: It is the third major element of the human body, about 9 percent of the total weight of the human body is made of hydrogen. In a water molecule, two hydrogen are there.Sea stack, sea arch and sea caves are all examples of land features created by
Answer:
B) wave erosion
Explanation:
T or F
ATP and NADPH are two types of protein carries T or F
ATP and NADPH are two types of protein carries
Why do normal cells divide?
A bacterium is placed in a hypertonic solution. Which of the following would the bacterium use to maintain osmotic pressure?
a. Active transport
b. Ion pumps
c. Facilitated diffusion
d. Contractile vacuole
Answer:
c. Facilitated diffusion
Explanation:
The bacteria shown in the question is in a hypertonic solution. Thus, we can conclude that the solution contains a higher solute concentration than the solute concentration inside the bacteria. For the osmotic pressure to be maintained the bacteria will receive solution solutes until the concentrations are balanced. This process is done through facilitated diffusion.
Some substances have certain characteristics that make it impossible for them to cross the cell's lipid bilayer by simple diffusion. However, they can also pass the membrane by passive transport, this type of process known as facilitated diffusion. In this way, particles can enter or leave the cell through their attachment to specific proteins, known as carrier proteins, or through aqueous pores of protein channels, both present in the cell membrane.
Care must be taken in interpreting electron micro graphs, some features visible in an electron micrograph may not be present in the living cell. Explain why.
What stores information in a cell
DNA, or deoxyribonucleic acid, is the molecule that stores genetic information in a cell. It carries the instructions for a cell's functions and replication and is found in the nucleus in eukaryotic cells and the nuclear zone of prokaryotic cells. Gene expression and cellular differentiation are dictated by DNA.
Explanation:The information in a cell is stored in the form of deoxyribonucleic acid, commonly known as DNA. DNA is a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms and many viruses. DNA stores the information needed to build and control the cell through the sequence of its four bases: adenine, thymine, guanine, and cytosine.
DNA replication is critical for the transmission of genetic information from one generation of cells to the next, ensuring that each new cell receives a complete set of DNA. This occurs in the nucleus of eukaryotic cells, and a specific nuclear zone in prokaryotic cells. The DNA molecule is composed of a long chain of nucleotides, each of which consists of a 5-carbon sugar, a phosphate group, and a nitrogen-containing base.
Furthermore, our understanding of how DNA stores and utilizes genetic information comes from the discovery of its structure by Watson and Crick in 1953. This discovery has been essential for modern biology, helping us understand the process of gene expression and how different cell types are formed, despite having the same genetic code.
What are X-Rays used for?
A. cook food
B. form images of internal organs
C. get TV signals
Answer:
B
Explanation:
To look inside of human body and see all the organs and other stuff.
Describe two ways that steroids differ from fats. ...?
Steroids differ from fats in two main ways: they have a fused ring structure and many of them have the -OH functional group, which puts them in the alcohol classification.
Explanation:Steroids differ from fats in two main ways:
Steroids have a fused ring structure, while fats do not. This ring structure is made up of four linked carbon rings, which is characteristic of all steroids.Many steroids have the -OH functional group, which puts them in the alcohol classification. Fats, on the other hand, do not have this functional group.
what organelles/cells houses the genetic material? ...?
How do solid solutions and gas solutions form.?
Solid solutions are often alloys, like steel, which is an alloy of iron and carbon mixed with other metals. Gas solutions form when gases like nitrogen and oxygen mix to form air, driven by an increase in entropy which favors the formation of a more disordered system.
How do solid solutions and gas solutions form? Solid solutions often form when different metals or nonmetals mix to create a single phase, such as alloys. For example, steel, which is an alloy of iron, carbon, and other metals, is a type of solid solution. On the other hand, gas solutions form when gases mix and the motion of the gas molecules causes them to diffuse and spread out uniformly. Air, being about 80% nitrogen and 20% oxygen with traces of other gases, serves as a classic example of a gas solution. The formation process is driven by an increase in entropy, indicating a more disordered system, which is thermodynamically favorable even when the enthalpy change (AH soln) is zero. This entropy increase is often why solutions can form easily when two gases are combined in the same container.
A polygenic trait can have
A. Fewer genotype than most single-gene traits.
B. Many possible genotypes, but few possible phenotypes
C. Fewer phenotypes than most single-gene traits.
D. Many possible genotypes, producing many possible phenotypes.
A polygenic trait can have many possible genotypes, producing many possible phenotypes.
Explanation:A polygenic trait can have many possible genotypes, producing many possible phenotypes. Polygenic traits are controlled by multiple genes, with each gene contributing a small effect to the final phenotype. This results in a wide range of phenotypes that can be observed for a polygenic trait, such as height or skin color.
For example, height is a polygenic trait influenced by multiple genes. There are many possible combinations of genes that can determine an individual's height, leading to a continuous distribution of heights in a population.
Therefore, the correct answer is option D. A polygenic trait can have many possible genotypes, producing many possible phenotypes.
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Molecular biologists are using __________ to directly manipulate genes for practical purposes.
A) DNA cloning
B) DNA polymerization
C) genetic engineering
D) bacteriophage infestation (help plz)
Answer: C) genetic engineering
Molecular biologists are using genetic engineering to directly manipulate genes for practical purposes. Genetic engineering is an artificial technique for manipulation of the genome of the organism which involves deletion or insertion of genes of interest. This artificial manipulation is done in order to remove mutant genes from the organisms genome to cure diseases and disorders, new genes are introduced which can produce desirable traits.