Fraternal twins, while conceived at the same time, are not genetically identical.
Which statement best explains why these siblings are genetically different from each other?
A.One chromosome from each pair randomly passes to the sex cells during meiosis and leads to differences between the siblings.
B.One chromosome from each pair randomly passes to the sex cells during fertilization and leads to differences between the siblings.
C.Mutations occur during meiosis and lead to differences between the siblings.
D.Mutations occur during fertilization and lead to differences between the siblings.
Fraternal twins are not genetically identical because one chromosome from each pair randomly passes during meiosis and leads to differences between the siblings. Meiosis involves independent segregation of sex chromosomes.
Meiosis is a type of reductional cell division by which a parent cell produces four daughter (gametes) cells having half the genetic material.
Fraternal twins occur when two egg cells are released by the mother, which are fertilized by a different sperm.
During meiosis, sex chromosomes are separated and segregate in a random manner in daughter (sex) cells.
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How does natural selection change the frequency of genes or traits over many generations? Biology students conducted an experiment mimicking genetic variation and coloration. Students used different colored beans to represent animals that might be prey: mice, for example. A student in each group was the predator: a hawk. Beans (mice) were randomly scattered on multicolored floor tiles, each color within four tiles. The hawk collected mice (beans) for 10 seconds. Mice not eaten reproduced. Three generations of data a shown in the table.
Genetic variation helps to drive natural selection and potentially, evolution. Red, white, and striped beans (mice) represent offspring that are the product of meiosis and sexual reproduction. Black and speckled beans (mice) are the result of mutations. Using the student data analyze the effects of these mutations on natural selection.
A) The color mutations provided a survival advantage to these two populations of mice.
B) The advantage of the mutations is dependent on the environment and external conditions.
C) While mutations provide genetic variation they did not play a role in natural selection.
D) The speckled mutation provided an advantage while the black mutation was a disadvantage for survival.
Answer:
D) The speckled mutation provided an advantage while the black mutation was a disadvantage for survival.
The speckled mutation provided an advantage while the black mutation was a disadvantage for survival.
Natural selection refers to the observation that organisms that are more suited and adapted to their environment live long enough to survive and reproduce thereby passing on their favorable characteristics to their offspring.
The mutation in which the mice became speckled was shown to be an advantage from the table. Hence, the speckled mutation provided an advantage while the black mutation was a disadvantage for survival.
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Which renewable resource is not safe for the environment and why?
Answer: Biomass
Biomass produces gas or many sorts of waste products which are mostly used in burning and cooking. It is plant or animal material used as fuel to produce electricity or heat. Examples are wood, energy crops, and waste from forests, yards, or farms.
But the reason why it can be harmful is because biomass can produce gases like methane. Methane is a greenhouse gas which can harm the environment and reduce the ozone layer that stops harmful UV light from reaching the earth atmosphere.
What is limestone?**
Answer: a hard sedimentary rock, composed mainly of calcium carbonate or dolomite, used as building material and in the making of cement.
Show you work here using the data table 1 to calculate the energy consumed by this female sea otter.
Answer:
the female sea otter has 1
Explanation:
Your skeleton enables you to move.
True
False
Answer:
True
Explanation:
Your skeleton supports your body weight to help you stand and move. Joints, connective tissue and muscles work together to make your body parts mobile.
Answer:
Allows movement: Your skeleton supports your body weight to help you stand and move. Joints, connective tissue and muscles work together to make your body parts mobile.
Explanation:
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A recombinant plasmid molecule is introduced into a bacterial cell by A. recombination B. nuclear transplantation C. ligation D. transformation
What is the main function of nucleic acids?
A. provide genetic information
B. long term energy
C. short term energy
D. build muscle, hair, and nails
which fungus does contain mycelium?
Answer:
Mycelium is part of the fungi kingdom and is the network of threads, called hyphae, from which mushrooms grow. Not all mycelia fruit mushrooms, depending on the environmental conditions, but all mushrooms come from mycelia.
Explanation:
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Write your own acrostic poem using the word "THANKFUL". You can use words or phrases for each line. Make sure to write about what you are thankful for.
Describe the structure and function of areolar connective tissue.
Answer:
Areolar Tissue is loose connective tissue that consists of a meshwork of collagen, elastic tissue, and reticular fibres - with many connective tissue cells in between the meshwork of fibres. The fibres that form the mesh structure of areolar tissue include: Collagen Fibres.
What is the name of the disease caused by a lack of thyroid hormones?
Fill in the blanks below with the correct word to complete the sentence.
Water is warmed by the sun and
It is then cooled and
Finally, it is brought back to Earth in the form of
Answer:
Evaporates, Condensed, Liquid Water
Explanation:
Water is warmed by the sun and evaporates
It is then cooled and condensed
Finally, it is brought back to Earth in the form of Liquid Water
Answer:
Fill in the blanks below with the correct word to complete the sentence.
Water is warmed by the sun and evaporate
.
It is then cooled and condensation
.
Finally, it is brought back to Earth in the form of
Water
⇒ precipitation.
Explanation:
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Many livestock are being grazed on public lands because the fees to graze on public lands are cheaper than the fees for private lands. If we aren't careful, what can this cause? A. owners moving their livestock TO private lands B. increased fees for private lands C. overgrazing on public lands D. overgrazing on private lands
Answer:
I would say that this would cause "overgrazing on public lands."
Explanation:
When people see that the fees are cheaper, they would send their livestock there. It might be alot of livestock though
What is carrying capacity? What factors could influence the carrying capacity of a population?
Answer:
Carrying capacity can be defined as a species' average population size in a particular habitat. The species population size is limited by environmental factors like adequate food, shelter, water, and mates. If these needs are not met, the population will decrease until the resource rebound
Humans have increased the world's carrying capacity through migra:tion, agriculture, medical advances, and communication. The age structure of a population allows us to predict population growth. Unchecked human population growth could have dire long-term effects on our environment.tion
similarities between the computer and the human body.
Answer:
Both of them have memory, both of them use electrical signals, both of them can retrieve and transmit data, both of them have partitions and both of them connect data in order to reach to conclusions which are logical and working
Explanation:
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1) How long is it's growing season for carrots.
2) How long is it's growing season for corn.
Answer:
2-4 months for carrots and about 120 days for corn
Explanation:
I don’t understand help
Answer:
A
Explanation:
not 100% sure but it seems to be the only sensible answer
This is confusing, help please
Answer:
C: the song bird
Explanation:
Birds follow a type II or in your case a type B survivorship curve. Unlike elephants which are a Type I or Type A, and the bugs are Type III or Type C in your case.
Answer: I think it would be (C)
Explanation:
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Which of the following is NOT considered a form of precipitation? *
Rain
Snow
Lightning
Hail
All of the above are considered precipitation
Answer:
Lightning is not considered a form of precipitation but rather a discharge of electricity.
thrips are insects that feed on rose
Answer:
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Why long cell easily go through the cell
Answer:
Cells divide for many reasons. For example, when you skin your knee, cells divide to replace old, dead, or damaged cells. Cells also divide so living things can grow. ... Organisms grow because cells are dividing to produce more and more cells
1. Which of the following characteristics is possessed by invertebrates?
a) exoskeleton
b) endoskeleton
c) joint appendages
d) cephalization
Answer: a) exoskeleton
Explanation:
Well, many invertebrates – and all arthropods – have a protective external casing called an exoskeleton. This literally means ‘outside skeleton’ and its role is to cover the animal’s soft tissues and also provide a rigid structure to which the creature’s muscles can attach.
I’ll give BRAINLIST??What organs/organs systems does schizophrenia affect and how does it affect it?
Answer: Schizophrenia is considered a disorder of the mind, influencing the way a person thinks, feels and behaves.
Explanation: Physical health is also important because if it is compromised, many of the benefits of improved mental health will be offset. Compared with the general population, schizophrenia patients are at increased risk of weight gain, abdominal obesity, diabetes, metabolic syndrome, and cardiovascular disease.
Answer:
Schizophrenia involves a range of problems with thinking (cognition), behavior and emotions. Signs and symptoms may vary, but usually involve delusions, hallucinations or disorganized speech, and reflect an impaired ability to function. Symptoms may include: Delusions.Schizophrenia is associated with changes in the structure and functioning of a number of key brain systems
Explanation:
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current definition
please help
Answer: now or like presently
Explanation:
I dont know
The external appearance of traits is called: -----
a.
Ecotype
b.
Genotype
c.
Cytotype
d.
Phenotype
Answer:
d) Phenotype
Explanation:
External appearance of an individual trait is called phenotype. The term "phenotype" refers to the observable physical properties of an organism; these include the organism's appearance, development, and behavior.
What is a long chain of one-ring sugar molecules?
Answer:
polysaccharide
Explanation:
Define bottleneck effect.
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Answer:
When disaster strikes, an ecosystem can change very quickly. When an event causes a drastic decrease in a population, it can cause a type of genetic drift called a bottleneck effect.Hope this helps ~Answer:
The bottleneck effect is an extreme example of genetic drift that happens when the size of a population is severely reduced. Events like natural disasters (earthquakes, floods, fires) can decimate a population, killing most individuals and leaving behind a small, random assortment of survivors.
Explain how cells theory development
Answer:
The invention of the microscope led to the discovery of the cell by Hooke. While looking at cork, Hooke observed box-shaped structures, which he called “cells” as they reminded him of the cells, or rooms, in monasteries. This discovery led to the development of the classical cell theory.20-Aug-2020
Explanation:
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