Answer:
The correct answer is -
Parental - BB and bb
F1
Genotypes: 100% Bb
F2
Genotypes: ¼ BB, ½ Bb, ¼ bb
Explanation:
It is given that a cross between a brown and a silver-blue mink produces all brown offspring and it is only possible if brown is dominant over silver blue in true breed cross, assume brown trait is represented by B and silver-blue is b then parents will be
BB and bb
B B
b Bb Bb
b Bb Bb
Cross between F1 individuals: Bb cross Bb
gametes : B, b and B, b
B b
B BB Bb
b Bb bb
the genotype of F2 : 1:2:1 = ¼ BB, ½ Bb, ¼ bb
21. Which force is used to separate solid pollutant particles from smoke given out from factories?
onlar
Answer: Electrostatic Force
Explanation:
1
Correct
How is a scientific law different from a scientific theory?
A.
A theory becomes a law after a long period of time has passed.
B.
A theory is why something happens and a law is how something happens.
C.
A theory cannot be disproved but a law can be disproved.
D.
A theory is used for biology and chemistry and a law is used for physics.
Next
The correct answer is B. A theory is why something happens and a law is how something happens.
Explanation
A scientific theory is a way of describing why chemical and physical phenomena originate. An example of this can be the theory of Charles Darwin on the Evolution of species. In this theory, Darwin set out to explain why the evolution of species and what influenced this development. On the other hand, a scientific law is a description of how some of the phenomena of nature occur. For example, Isaac Newton's Law of Universal Gravitation was intended to describe the gravity. From the above, it can be inferred that the correct answer is B. A theory is why something happens and a law is how something happens.
Which of the following is the best example of homeostasis in the human body?
Answer:
Humans' internal body temperature is a great example of homeostasis. When someone is healthy, their body maintains a temperature close to 98.6 degrees Fahrenheit (37 degrees Celsius). Being warm-blooded creatures, humans can increase or decrease temperature internally to keep it at a desirable level
which of the following criteria could Not be used to determine how closely related two types of organisms are?
A. developmental stages
B. DNA sequence
C. occurrence of both organisms in the same habitat
D. the presence of homologous structures
Answer:
The answer is c because different types and species of organisms can live in the same habitat so the mere fact that both organisms live in the same habitat doesn't mean they are closely related.
Some plant seeds have special spiky barbs that can easily get tangled in an animal's fur. The spiky structure of these seeds most likely benefits a plant by
A. keeping animals far away from the parent plant.
B. keeping the seeds from being moved away from the parent plant.
C. attracting pollinators with their bright color and fruity smell
D. helping the seeds to be scattered in new areas to grow.
what morpholoical features do whales have that woule suggest whales are more closely reltaed to humans than fish
Answer:
1. mammary glands
2. vertebral column
3. four limbs
Explanation:
Whales and humans have many more detailed features in common (homologies) than do whales and fish because whales and humans share a most recent common ancestor. Whales and humans are mammals (Class Mammalia), whereas fish are not mammals. First, both whales and humans have mammary glands: whales have mammary glands on the chest and stomach (like other mammals). Second, nearly all mammals have a vertebral column composed of 7 cervical vertebrae (humans and whales are not an exception to this rule). Like other mammals, whales have four limbs: although whales are adapted to live underwater, they evolved from a terrestrial mammal ancestor that once walked on four legs (about 50 million years ago).
Compare and contrast the cell cycle with mitosis and the cell cycle with meiosis. Citing 4 similarities and 5 differences.
Answer:
according to the type
Explanation:
they depend on the type
During frog gastrulation, involution occurs at the Group of answer choices endometrium. blastopore blastocoel. trophoblast. archenteron.
Answer:
blastopore
Explanation:
Involution is the second stage after invagination during frog gastrulation. Involution occurs at the blastopore when the marginal zone cells get to the tip of the blastopore, make an inward turn and then move along the inner exterior of the outer cells sheets.
This means that the cells found at the lip of the blastopore and always undergoing change and the first of these cells to develop into the dorsal lip are the endodermal cells. Next are the mesoderm cells that form the Notochord.
What would be the correct complimentary base pair be for a DNA strand with the following sequence...
ACGTGA
A. TGCACT
B. GGCTA
C. OTGAACT
Answer:
Explanation:
A TGCACT
The correct complementary base pair for the DNA sequence ACGTGA is TGCACT (Option A).
Deoxyribonucleic acid (DNA) is a double helix molecule composed of two long chains of nucleotides linked by hydrogen bonds.In DNA, there are four types of nucleotides, each one containing one different nitrogenous base (i.e., Cytosine, Guanine, Adenine and Thymine).According to the base pair rules, Adenine always pairs with Thymine, while Cytosine always pairs with Guanine.In conclusion, the correct complementary base pair for the DNA sequence ACGTGA is TGCACT (Option A).
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If you were dropped off in the wilderness to survive for two months, what 12 things would you take with you? They must be items that would fit in a backpack.
^^
Answer:
Map & Compass. Technology can be a great tool, especially with GPS, however it's important to not solely depend on your smartphone when you're lost in the backcountry. ...
First-Aid Kit. ...
Signal Mirror. ...
Fire Starter. ...
Water Purification System. ...
Knife. ...
Cordage. ...
Fishing Line and Hooks.
Answer:
knife, lighter, flashlight, portable camp,
Explanation:
Prequipo, resuelvan los siguientes problemas. Pueden
uladora
Encuentren los términos faltantes de las siguientes si
a) 1, 4, 16, ____, 256, 1024, 4096,
b) 4. 28, 196, 1372,
3294172,..
2. ¿Cómo encontraron los términos faltantes en cadas
Answer:
a.) (4×2)² = 8² = 64
b.) =9604, 67228,470596
solo dividi el segundo termino con el tercero y me dio 7 y fui multiplicando el resultado por 7
Which of the methods of generating electricity shown below does NOT use alternative energy resources?
Answer:
A.Please leave a 5-star rating and Thanks!Part C - Follicles Kate thought it was interesting that, after the release of a mature oocyte from the ovary, the follicle it was released from took on a new role. What happens to the follicle
Answer: The follicle assumes a new role which is:
--> the secretion of hormone PROGESTERONE and
--> OESTROGEN
Explanation:
The cycle in the female reproductive system of humans which tak s 28dayd to complete is known as menstrual cycle. At the beginning of the menstrual cycle, several primary oocytes begin to develop. Each oocyte is surrounded by actively dividing granular cells from which it receives nutrients. The whole structure is called a FOLLICLE.
A developing follicle secretes OESTROGEN.
Usually, only one of the developing follicles becomes mature to produce an ovum. As the follicle matures, it becomes filled with fluid and the oocyte is pushed to one side. Ovulation occur when there is release of an ovum from a mature follicle.
The ruptured mature follicle develops into a CORPUS LUTEUM which is a solid yellow body that secretes the hormone PROGESTERONE. This is the hormone that helps to maintain the early stages of pregnancy if fertilization and implantation of embryo occurs. In the absence of pregnancy, the corpus luteum shrivels.
In a female, several main oocytes begin to mature at the start of the menstrual cycle. Each of the oocyte is surrounded by granular cells that are actively dividing and provide it with nourishment forming a ball like mass structure. This structure is known as a follicle.
After the release of a mature oocyte from the ovary, the follicle it was released from takes on a new role and becomes the Corpus luteum.
The ruptured mature follicle after releasing the one main oocyte that develops into the egg develops into a Corpus Luteum. This structure functions in the secretion of the hormone known as progesterone.
If fertilization and embryo implantation occur, this hormone helps to maintain the early stages of pregnancy. The corpus luteum shrinks in the absence of pregnancy.
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Mika wants to improve in math. She makes a goal to go to sleep by 10 p.m. very night for the next month. Which part of SMART goal is not being met?
How can we measure motives?
You have crossed two Mexican hairless dogs, and the offspring are 1/3 hairy and 2/3 hairless. Given this phenotypic ratio, draw the Punnett square for this cross. Indicate the phenotype for each of the possible offspring. What are the genotypes of the P1 and F1 dogs in this crosList the predicted genotype as well as the phenotype for each of the offspring. Which genotypes are hairless and which are hairy? List the predicted genotype as well as the phenotype for each of the offspring. Which genotypes are hairless and which are hairy? Can you design a genetic cross that would yield a true breeding hairless line-where all offspring is hairless?
Answer:
- Punnett square:
H - h
H - HH (lethal) Hh (hairless)
h - Hh (hairless) hh (hairy)
- Cross: Hh × Hh (all genotypes are Hh)
- Genotypes of the P1 dogs: heterozygous (Hh)
- Genotypes of the F1 dogs: 1/3 hh; 2/3 Hh
- It is not possible to design a cross where all offspring are hairless because the H allele for hairless is lethal in homo-zygous condition (the maximum possible is 2/3 hairless individuals)
Explanation:
As you can see in the Punnett square above, the 1:2 ratio (i.e., 1/3 hairy and 2/3 hairless) is indicative that the hair phenotype is a single (monogenic) trait associated with a lethal allele (H allele). In this case, it should be impossible to design a true-breeding cross because the homo-zygous HH genotype is lethal. Alleles that cause the death of an organism are known as lethal alleles (in this case, the H allele). A recessive lethal allele is only lethal in the homo-zygous individuals, thereby heterozygous individuals survive and they may exhibit a normal/altered (non-lethal) phenotype.
A change in a gene or chromosome that causes a new trait to be inherited is called a
Answer:
I think the answer is a gene mutation.
Explanation:
A gene mutation is a change in one or more genes.
which behavior is a response to an external stimulus
A. and elephant drinks water to be
B. child gets a fever to fight off the flu
C. a dog vomits during an illness to rid itself of pathogens
D. a turtle Suns itself on a rock on a cool day
Answer:
D. a turtle Suns itself on a rock on a cool day
Explanation:
If organisms inherited traits via blending inheritance, rather than Mendelian inheritance, what would we expect the offspring (F1 generation) of a blue-flowered plant and a yellow-flowered plant to look like
Answer:
green-flowered plants
Explanation:
In biology, blending inheritance refers to an erroneous theory from the XIX century, which proposed that the progeny (F1) inherits phenotypic traits as an average of parental phenotypic values. If this theory would be true then a crossing of a blue flower variety with a yellow variety of the same species would produce green-flowered progeny (since green is a combination of blue and yellow). Charles Darwin used pangenesis, a hypothetical mechanism for heredity that implied blending inheritance, in order to understand the transmission of hereditary characters. Darwin believed that different parts of the body generated heredity particles called 'gemmules' that aggregated in the gonads, and contributed to the transmission of heritable information to the next generation. The blending inheritance theory was replaced by Mendelian inheritance during the early 1900s.
Which statement is true regarding the way in which sex chromosomes are passed on to offspring? Females can pass only Y chromosomes to their offspring. Females can pass either an X or a Y chromosome to their offspring. Males can pass either an X or a Y chromosome to their offspring. Males can pass only Y chromosomes to their offspring.
Answer:
Males can pass either X or Y to their offspring's
Explanation:
Males determine the age (not on purpose) females have the kid
Males can pass either an X or a Y chromosome to their offspring, while females can pass only an X chromosome to their offspring. Therefore, the statement that is true regarding the way in which sex chromosomes are passed on to offspring is: "Males can pass either an X or a Y chromosome to their offspring."
What is the function of sex chromosomes ?Sex chromosomes determine the sex of an individual and are responsible for the inheritance of sex-linked traits. In humans, there are two sex chromosomes: X and Y. Females have two X chromosomes, while males have one X and one Y chromosome.
During sexual reproduction, the sex chromosomes are passed on to offspring from their parents. The father can pass on either an X or a Y chromosome to his offspring, while the mother can only pass on an X chromosome. This means that the sex of the offspring is determined by the father's contribution of either an X or Y chromosome.
If the father contributes an X chromosome, the offspring will be female (XX). If the father contributes a Y chromosome, the offspring will be male (XY). This means that while the mother's contribution is always an X chromosome, the father's contribution determines whether the offspring will be male or female.
Sex-linked traits, such as color blindness and hemophilia, are carried on the X chromosome. Because females have two X chromosomes, they can be carriers of these traits without exhibiting symptoms themselves. However, males only have one X chromosome, so they are more likely to exhibit symptoms of sex-linked traits if they inherit a faulty gene on that chromosome.
Overall, the inheritance of sex chromosomes plays an important role in determining the sex of an individual and can influence the inheritance of sex-linked traits.
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What is described: Retinitis Pigmentosa is a genetically inherited eye disease that only men get
A- incomplete dominance
B- basic dominance/mendelian inheritance
C- co-dominance
D- sex-linked
E- multiple alleles
Answer:
D
Explanation:
Answer:
The answer for this question is that sex-linked.
In Drosophila, the genes r and s are linked. Flies of genotype r s/r s and rs /rs are crossed and an F1 obtained. The F1 allele arrangement is called:
Answer:
repulsion (trans)
Explanation:
Repulsion refers to the phenomenon by which each homologous chromosome contains one dominant and one recessive allele from two different linked genes. A trans arrangement occurs when an individual is heterozygous for two linked genes, where the recessive allele for one particular gene is located on the same chromosome as the dominant allele for the other linked gene, thereby dominant and recessive alleles are said to be “in repulsion”. Conversely, a cis arrangement occurs when both dominant alleles are located on one chromosome and both recessive alleles on the other.
Describe what the plant looks like, including descriptions of any flowers or seeds, so that the farmer or rancher could identify the plant. Discuss the typical habitat for this plant. Where is this plant most likely to be found
Botany is also known as
Answer:
Also known as plant science or phytology, botany is the science of plant life, involving the study of the 400,000+ species of plants that inhabit the land around us. Over time, people learned to identify numerous different kinds of plants, discerned which were useful for food or medicine, and began to cultivate certain species.
This is the Answer for your question :3
This is the Answer for your question :3I hope you are having a great day
The mononuclear phagocyte system is an intricate passageway within and between tissues and organs and is an area full of lymphocytes, which are phagocytic cells used to attack foreign invaders.
a. True
b. False
Answer:
False.
Explanation:
Mononuclear phagocyte comprises of cells defined from the bone marrow progenitors, cells that descend blood monocytes and tissue macrophages. This undergo phagocytosis and they phagocytes foreign Invaders and bacteria. That is they ingest or engulf any foreign substances in the liver cells.
critical thinking why are intramuscular injections given in the gluteus medius muscle rather than the gluteus maximus muslce in the buttock region
Answer:
hey so you you still need help with this?
Identifying Variables in a Hypothesis
Identify the variables in this hypothesis.
If the pressure of a gas is increased, then the volume will decrease because the particles of the gas will be forced
closer together
The independent variable is
The dependent variable is
Answer:
The independent variable is pressure
The dependent variable is volume.
Explanation:
Answer:
The independent variable is pressure.
The dependent variable is volume.
Explanation:
volume of matter decreases under pressure ... -under pressure, the particles in a gas are forced closer together ... factors affecting gas pressure ... -if pressure in a sealed container is lower than outside, gas will rush in ...
A white-tailed deer cannot make its own food and must consume other organisms
for its nutrition. Therefore, the white-tailed is considered a (an)
A)heterotroph.
B)producer.
C)chemotroph.
D)autotroph. .
Answer:
A) Heterotroph
Explanation:
White tailed deers are consumers and do not produce their own food. Most mammals can’t either. Putting in the heterotroph category.
Hope this helps, good luck!
Thanks to DNA testing, scientists have discovered that a tree in South America is genetically similar to one in Australia. What is one possible evolutionary inference they could make from this discovery
Answer:
Both species share a common ancestor that lived when the Earth had supercontinents
Explanation:
Gondwana was a supercontinent that existed about 550 million years ago (Neoproterozoic Era) and began to break up about 180 million years ago (Jurassic period). During this period, Gondwana gradually broke up into the continents we know at present, and it has been proposed that about 140 million years ago Africa/South America started to separate from Australasia/India/Antarctica (Cretaceous period). On the other hand, DNA testing is a method based on the comparison of genetic sequences that can help to determine the ancestral history of different individuals, populations and species by determining the homology level between DNA sequences. In this case, sequence homology can be used to infer evolutionary relationships between species separated by a geographic barrier (i.e., South America and Australia are separated by the Pacific Ocean), thereby suggesting the existence of past supercontinents and also suggesting that both species share a common ancestor that lived when the Earth had such supercontinents.
What are the common elements found in the structure of fats, carbs, protein, and vitamins? What about in minerals?
Answer:
Carbon
Explanation:
Most Organic compounds contain carbon (: