Which statement is most supportive of the claim that genetic diversity is an advantage of sexual reproduction?
Genetic variation from sexual reproduction ensures that at least some individuals will have advantageous traits that help them survive.
Asexual reproduction results in the same genes being copied, which means the same vulnerabilities in the population.*******
Sexual reproduction creates genetic diversity, which results in a wide range of appearances in a population.
Lack of genetic diversity from asexual reproduction results in a diminished ability to survive changes to the environment.
What is the most likely explanation for a child exhibiting a heritable trait that neither parent exhibits?
The trait was passed on by a different biological parent, and one of the child's parents is not biologically related.
The trait was inherited from a more distant relative, like a great-grandparent.
The parents carried a second trait that masked the trait of interest.
The trait is recessive, so both parents carry it, and the child inherited each recessive allele.**********
Which statement has exceptions?
Sexual reproduction requires two parents, whereas asexual reproduction requires only one parent.
Sexual reproduction produces genetic variation, but asexual reproduction does not.
Sexual reproduction is more complex, while asexual reproduction is a simpler process.
Sexual reproduction involves parental care, while asexual reproduction does not.******
Assume a bacterial cell failed to replicate its DNA before it reproduced two daughter cells. The reproduction would result in
neither cell containing DNA.
both cells containing DNA.
one cell with DNA and one cell without DNA.*******
one cell with DNA and one cell with two sets of DNA.
A parent bacterial cell is able to survive in the presence of the antibiotic penicillin. Subsequent generations from this parent will be _______ penicillin.(1 point)
resistant to*****
killed by
dependent on
vulnerable to
Hydras are animals related to coral and jellyfish. Hydras can reproduce sexually or asexually. Why would hydras avoid reproducing asexually when conditions are difficult?
The lack of genetic diversity could mean that all of the hydras die, depending on the situation. ******
The high genetic diversity could mean that all of the hydras die, depending on the situation.
Reproducing more rapidly would be a good way to take advantage of plentiful resources.
Reproducing more slowly would be a good way to take advantage of plentiful resources.
Sexual reproduction creates genetic diversity, allowing some individuals to have advantageous traits. Inheriting a trait that neither parent exhibits suggests it is recessive and both parents carry it. Hydras avoid asexual reproduction when conditions are difficult to prevent a lack of genetic diversity.
The statement that is most supportive of the claim that genetic diversity is an advantage of sexual reproduction is: Genetic variation from sexual reproduction ensures that at least some individuals will have advantageous traits that help them survive. Sexual reproduction creates unique combinations of genetic material through the process of fertilization, resulting in offspring with diverse traits. This genetic diversity increases the likelihood of individuals having advantageous traits that can help them adapt and survive in changing environments.
In the case of a child exhibiting a heritable trait that neither parent exhibits, the most likely explanation is that the trait is recessive and both parents carry it. This means that the child inherited two copies of the recessive allele, one from each parent, which is necessary for the trait to be expressed.
Hydras, despite being capable of reproducing asexually, would avoid doing so when conditions are difficult because asexual reproduction does not create genetic diversity. Without genetic diversity, all hydras in the population would have the same traits, making them vulnerable to changes in the environment.
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The greenhouse effect is a natural proccess that allows the development of life, it has natural causes. On the other hand, the enhaced greenhouse effect, also know as climate change or global warming, it's reffered to the impact on the climate caused by the overheating of the Earth's surface because of the human activity. Then, option D is correct.
b. Medulla
c. Pons
d. Cerebellum
Answer: option C) Pons
Explanation:
Pons, or better still, the pons Varolii is a band of nerve fibers located within the brain stem. While, the brain stem is known to connect the spinal cord(Hind brain) to the fore brain
Thus, Pons extends through the hindbrain, midbrain, and forebrain.
Answer:
Reticular formation
It's correct
O helium
hydrogen
Oxygen
Olithium
Answer:
Oxygen
Explanation:
The electrons present in an atom are arranged in shells or orbitals. The electrons are filled into these shells based on their energy levels with those shells closest to the nucleus filled first as they have the lowest energies.
The arrangement of electrons around the nucleus of an atom is known as electronic configuration. The outermost electron shell of an atom is known as a valence shell shell and the electrons found in this shell are known as valence electrons. The electrons usually exist in pairs. The first shell can only contain two electrons; the second shell can contain 8. the electrons are singly filled first before pairing occurs.
The electronic configuration of the atoms of the elements in the option are as follows:
Helium : 1s² ; valence electrons are 2 which are both paired
Hydrogen: 1s¹ ; valence electron is 1
Oxygen : 1s²2s²2p⁴ ; valence electrons are 6 wit two unpaired electrons
Lithium : 1s²2s¹ ; valence electron is 1
Helium has two valence electrons but they are paired as its 1s shell can only contain a maximum of two electrons.
Oxygen has 6 valence electrons. Two of these electrons are paired while the other two are unpaired.
B. desmosomes
C. peroxisomes
D. extracellular matrix
E. gap junctions
Answer:
E
Explanation:
Gap junctions in animals, like plasmodesmata in plants, connect the cytoplasm of two cells through dedicated and regulated channels. A gap junction is made of two hemichannels connected together leaving a channel that is 2-4 nm across -tranversing the two cells' cell membranes. The gap junctions allow for the cells to signal each other through allowing exchange of ions and other moelcules. One significance of gap junction is in enhancing communication between cells in the development of tissues and embryo.
Plasmodesmata in plant cells are most similar in function to gap junctions in animal cells.
Plasmodesmata are channels that connect plant cells and allow for the exchange of various materials, including nutrients and signaling molecules. They are most similar in function to gap junctions in animal cells. Gap junctions are specialized channels that connect neighboring animal cells, allowing for the direct transfer of small molecules and ions.
Like plasmodesmata, gap junctions play a crucial role in cell-cell communication and coordination within tissues. They facilitate the rapid passage of substances, such as ions and small metabolites, between adjacent cells, allowing for coordinated responses and sharing of resources.
Therefore, the answer to this question is E. gap junctions.
Learn more about Plasmodesmata here:
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Answer:
Explanation:
A) to determine amino acid sequence of the protein produced by that gene. We will use cDNA library, we will hybridize given part of DNA sequence ( as this part only contains exon part). Than we will isolate the hybridize part and translate this sequence using generic coding table.
B) for determine presence or absence of introns in gene used isolated cDNA in first question. Now we will add this cDNA to DNA library. Here cDNA due to complementary mature binds with DNA. If cDNA binds completely with gene with out looping part of gene it shows that gene is having only exons .
And if along with hybridization part some looped part present in between-- it shows both exons and intron are present.
C) for determining alternative splicing we will use cDNA library.
d) to determine length of mature mRNA which includes both the UTR and poly A sequence we will go for cDNA cloning and look for particular cDNA complementary to DNA segments. And later we isolate that cDNA and examine its whole length
E) to determine which cells in the tribble body express this particular mRNA . We use fluorescent tagged small DNA part provided. Then we will add this DNA probe to supplied tribes. The cells which are expressing , will have cDNA will bind to probe and florescent can be detected. Cells which are not expressing that gene, here probe will not bind and no fluorescence.
F) to determine that whose blood strain is this. We will do VBTR profiling . Which VNTR profiling similar to belief stain help to determine which blood stain is this.