Answer:
i need help tooooooooooooo
Chromosome structure can be microscopically observed best during.
a. telophase b. anaphase c. prophase d. metaphase 1
Answer: chromatin condenses into chromosomes and can be best observed in prophase.
Explanation: chromosomes can’t be visualised by a light microscope except during cell division (mitosis or meiosis). The individual chromosomes become visible as the chromatin is wound tightly and are most clealry seen in late prophase.
The absolute refractory period for a neuron is the time: Group of answer choices Between graded potential summation and when threshold is reached Necessary to break down the neurotransmitter molecules that have detached from receptors in the postsynaptic membrane It takes a stronger threshold to trigger/fire an action potential During which a second action potential cannot be triggered, no matter how strong the stimulus
Answer:
c
Explanation:
How does the pH affect the chemical bonding?
Which is not an example of abiotic factor?
Answer:
Plants are not an example of an abiotic factor
Explanation:
Answer:
plants are living/biotic so this means it isn't abiotic. (abiotic means nonliving)
Explanation:
A characteristic is observed in an offspring that is not present in the parents. Which of the following
would cause a change in the phenotype of the offspring that was NOT present in the parent?
a mutation during cell replication in the parent body cells
a mutation during cell replication in the offspring sex cells
a mutation during gamete formation in the parent sex cells
a mutation during gamete formation in the offspring body cells
Answer:
C
Explanation:
A characteristic is observed in an offspring that is not present in either of the parents due to mutation during gamete formation in the parent sex cells. So the correct option is C.
What is heredity?The transmission of characteristics from parents to their biological offspring is called heredity. Heredity is apparent in sexual reproduction due to the high chances of variation.
The errors that might occur during the DNA replication result in the development of variations. The occurrence of variation is an important phenomenon for evolution to happen. Therefore, sexual reproduction is important for evolution.
Gene mutations and genetic recombination result in the development of variations. Asexual reproduction also gives rise to variations but those variations are not as apparent as in the case of sexual reproduction.
The mutations that happen in the gametes of parents during sexual reproduction may result in variation and thus the appearance of a new character in the offspring, that was absent in both the parents.
Therefore the correct option is C.
Read more about heredity, here
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Are the 4 gamete cells generated unique?
(will mark branliest)
Answer:
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. ... Meiosis I is a type of cell division unique to germ cells, while meiosis II is similar to mitosis. Meiosis I, the first meiotic division, begins with prophase I.
How many sex chromosomes does the normal human female inherit from her mother?
A. 1.2
B. 2.46
C. 3.22
D. 4.1
E 5.23
Answer:
A. 1.2
Explanation:
Normally, a human body cell contains 46 chromosomes - 23 inherited from the father and the same number from the mother.
Most of the human DNA, or human genes, are located in the chromosomes.
Each metaphase chromosome consists of:
two sister chromatids containing one DNA molecule each, and since they are formed by replication, these molecules are completely identical in gene content; that is why chromatids are called sister chromatids; two centromeres, one on each chromatid.
Do you think trees on a mountain increase or decrease the rate of erosion? Why?
Answer:
trees decres the rate of erosionon a mounten becues the roots act like beems in the soil
Explanation:
Which element is removed from the air during the air separation phase of coal
Answer:
An air separation plant separates atmospheric air into its primary components, typically nitrogen and oxygen, and sometimes also argon and other rare inert gases. The most common method for air separation is fractional distillation.
Explanation: This is the best I could do so hope it helps kk bye
In most cases, adaptive immune responses rely on the initial activation of _____ in secondary lymphoid tissue:
Answer:
This question lacks options, options are: a. macrophages
b. T cells
c. B cells
d. dendritic cells
e. epithelium
The correct answer is c.
Explanation:
In the secondary lymphoid organs is where foreign substances or antigens are presented and the specific immune response begins. They are the lymph nodes, spleen, and MALT. The main function of B cells is the recognition of foreign molecules to the body, called antigens, and the production of specific antibodies to neutralize them. After maturation, B cells are central cells in the adaptive immune response, they agglomerate in the lymph nodes, spleen and other lymphoid tissues, where they will come into contact with the antigens for which they are specific.
How might people and animals be impacted by tornado?
Answer:
Some of the people will be scared with fear
Explanation:
Animals will be impacted because they will also get scared
Hope this helps with your question
Pls mark brainlist
Which of the following happens during interphase?
a.prophase
b.cell growth
c.cytokinesis
d.cell division
During interphase, cell growth occurs
Is this a function? (6,3), (5,8), (4,7), (1,5), (6,-9)
Answer:
nope cuz the 6 in the x position repeats :)
Humans can selectively breed a vegetable to produce more desirable crops
In the food web below, what would happen to the snake population if the mouse
population decreased?
The diagram shows a food web.
Fox
Shrew
Sake
Mouse
Grasshopper
Rabbit
It would increase
It would decrease
O it would stay the same
Answer:
Most likely it would decrease because the snake would not have any mouses to eat.
Explanation:
What is the most direct evidence in this photo of millions of years of deposition?
Answer:
A. The smooth, clear rock layers
Explanation:
Answer:
A
Explanation:
My son just had it on his test.
Match the causes with their effects
Which is the best way to describe the biodiversity of an area?
A grassland has organisms that live on hundreds of acres of land.
A desert has 10 species of animals that can survive dry conditions.
A rainforest has fertile soil that supports many kinds of plants.
A pond has 12 species of organisms, including 300 animals and 40 plants
Answer:
The answer is D
Explanation:
Which statement is an example of how structure relates to function ?
Answer:
B The mitochondria have a highly folded membrane which increases the amount of the ATP can be made
Explanation:
If you could genetically engineer a more efficient system of carbohydrate digestion for the ruminant, what would you try to make the new system accomplish
Answer:
Make sure the complex carbohydrate are simpler to enhance better and easier digestion
Explanation:
If I could genetically engineer a more efficient system of carbohydrate digestion for the ruminant, I would you try to make the new system accomplish a a simpler form of carbohydrate.
This will enhance a better and easier digestion and absorption as a result of the challenges ruminant animals face as a result of the complex carbohydrate they take in which makes them regurgitate to digest it properly.
What is the portion of the cell cycle during which the chromosomes are invisible under the light microscope because they are not yet condensed
Answer:
Interphase
Explanation:
The portion of the cell cycle during which the chromosomes are invisible under the light microscope is the interphase.
Generally, there are 2 main phases of the cell cycle, namely;
1. The interphase
2. The m phase
The interphase is further subdivided into 3 phases:
G1 phase: which is characterized by the growth and development of the cell and also the synthesis of DNA precursors.S phase: characterized by the synthesis of DNA and duplication of the centrosome.G2 phase: characterized by the synthesis of proteins and further growth/development of the cellThe m phase represents the active division phase, also known as mitosis.
Immediately the cell leaves the interphase for the m phase, the genetic materials in the cell condense, thicken, and become visible under the microscope as chromosomes. This phase of mitosis is known as the prophase and the chromosomes remain visible through the rest of the mitotic phase (metaphase, anaphase) until the last phase, which is the telophase/cytokinesis.
At telophase/cytokinesis, the chromosomes condense back and the daughter cells produced enters the interphase for a repetition of the cycle.
which option identifies the storage condition will support the growers goal in the following scenario
an apple grower wishes to sell the harvest of fruit over as many months as possible a goal that demands the fruit be kept from fermenting or using up its natural sugars through respiration
Warm, moist environment
high- oxygen environment
cold, dry environment
warm, low oxygen environment
Answer:
warm moist environment
Answer:
warm moist envirment
Explanation:
ANSWER AND GET BRAINLIEST
Answer:i cant see the picture
Explanation:
Which action changes the identity of the substance referenced?
running an electric current through copper
burning wood
melting gold
breaking an ice cube
Help please !
Peat contains acids that can help fight diseases.
True
False
Answer:
false
Explanation:
The reason why its false is because a person can't fight diseases with acids. there is something your body has called Antibodies. Also acid would only make it worse
On the wave diagram pictured below, what is the term for points B and F?
Which statement is accurate about dominant alleles? (1 point)
O They are expressed whenever present.
O They are indicated by lowercase letters.
O They result in the trait of shortness in pea plants.
O They are expressed only when a recessive allele is not present.
Answer: I believe it would be A "They are expressed whenever present."
Explanation: Dominant alleles always show up, in the F1 generation the recessive allele are masked.
The statement is accurate about dominant alleles is they are expressed whenever present. Hence option a is correct.
What are dominant alleles?Dominant alleles are defined as a gene variant that, despite the presence of other alleles, will result in a certain phenotype. Dominance is a phenomena in genetics when one version of a gene on one copy of a chromosome obscures or overrides another version of the same gene on the other copy of the chromosome.
Completely dominant alleles will always be expressed in the phenotypic of the cell. The dominant allele is therefore always expressed, but because penetrance might vary, it is sometimes not as clearly represented in the phenotypic of the cell as you would anticipate from a dominant allele.
Thus, the statement is accurate about dominant alleles is they are expressed whenever present. Hence option a is correct.
To learn more about dominant alleles, refer to the link below:
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Which trait would be passed on from a parent to its offspring because of natural selection
Answer:
just got from internet
Answer:
Theory of evelotion
Explanation:
Which of the following correctly describes the role of biomolecules in energy storage ?
Answer:
Biomolecules are crucial to the storage of energy energy in the body.
Biomolecules conserve energy using covalent chemical bonds.
Explanation
A covalent bond in chemistry refers to a chemical bond that is formed when two atoms share a pair each of electrons.
So some of these molecules which have high energy (such as glycogen and triglycerides) are able to keep or store such energy in the form of covalent chemical bonds. Examples of energy-rich biomolecules are:
glycogen and triglyceridesCells synthesize such molecules and store them for later release of the energy.
Cheers
Answer: B. Carbohydrates are used for short-term energy storage, and lipids are used for long-term energy storage.
Explanation:
Humans and animals use carbohydrates for short-term energy storage and are stored as glycogen which can be broken down into glucose when energy is needed.
Lipids are used for long-term energy and are stored as fats in the body. These fats can be broken into fatty acids when the body needs energy.
TEST: INNER EARTH, PLATE TECTONICS,
and he ROCK CYCLE
Directions Correctly label the layers of the Earth
MATCH the NUMBER OF each LAYER OF THE EARTH NO ins DESCRIPTION
Answer: No
Explanation: Don't cheat on tests