Answer:
During mitosis, the chromosomes condense so that each chromosome is a distinct unit.
Explanation:
What is required for sexual reproduction to occur?
1.an individual that produces sperm and an individual that produces eggs
2.an individual that produces sperm and an individual that produces spores
3.an individual that produces buds and an individual that produces spores
4. an individual that produces buds and an individual that produces eggs
Answer:
1
Explanation:
It sexual reproduction you need both a sperm and egg cell.
Answer: 1. an individual that produces sperm and an individual that produces eggs
Explanation:
Consider the separate stages of an animal virus life cycle. Assemble a list of structures and processes that are unique to the virus and would make good drug targets for an antiviral agent. Explain your rationale for each choice.
Answer:
Explanation:
In order to make an antiviral agent, we need to find good drug targets, that is, to find structures and processes that are only present in the virus, so there is no harm on human cells when this antiviral agent is being applied.
In the virion of a naked virus, only nucleic acid and protein are present forming the nucleocapsid. The nucleic acid and proteins of the capsid, specially, are found only in the virus and therefore make good drug targets. For example, we can express antibodies to recognize the proteins of the capsid and guide the immune system to destroy them.
Although virus particles are metabolically inert, one or more key enzymes are present within the virion in some viruses, for example, the reverse transcriptase. This enzyme is only found in viruses and if we find a way to inhibit the activity of this reverse transcriptase, like for example finding a competitor substrate, the virus will not be able to synthesize the DNA needed for its replication.
Regarding processes in the virus life cycle, they all have similar steps: first the attachment of the viral particle onto the cell, then the penetration of the virus, then the synthesis of early and intermediate enzymes using the host cell machinery, and finally the assembly of these viral components and lysis of the host cell to release new viral particles.
The attachment of a virion to a host cell is a highly specific process. Recognition proteins on the virus recognize specific receptors on the host cell. Substances that compete with the virion for these specific receptors can be used. If there is no attachment, there is no infection.
How do heredity and inheritance relate to the data presented In these charts
Your risk is greatly raised if any of these relatives have had breast or ovarian cancer. However, until many of these “secondary” relatives have the disease.
What is role of inheritance in breast cancer?A woman's risk of breast cancer nearly doubles if she has a first-degree family (mother, sister, or daughter) who has the disease.
Her risk is nearly three times higher if she has two first-degree relatives. A woman's risk of developing breast cancer is considerably higher if her father or sibling had the disease.
Gene changes that are connected to breast cancer are typically acquired. Only the breast cancer cells experience acquired DNA alterations over time.
Therefore, Hereditary is Breast cancer and Inheritance is Getting Breast Cancer, basically it runs in the family inheriting.
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Laws have been enacted to regulate cigarette labeling and advertising. What is this an example of?
an impact of changing scientific knowledge on society
the interrelationship of science and technology
an influence of society on scientific progress
the changing nature of scientific knowledge
Answer: B
Explanation: Society is basically a community of people and the way they live. The study on smoking is definitely science. So it would be b.
Answer:
A
Explanation:
I'm pretty sure it's A :)
Why do planets close to the sun have thin atmospheres and the planets far away from the sun have thick atmospheres. Use what you know about the nebular theory.
Answer:
There are two primary factors: size and distance from the Sun. Gravity helps planets and moons to hold on to their atmospheres, so small planets/moons such as Mars and the Moon have thin atmospheres. The reason why the outer planets are larger is probably down to two major factors. The first is simply the amount of material available which may be accreted to a planet. Clearly, the further away from the Sun, the longer the orbit (twice as far means an orbit twice the physical length).
Explanation:
A cell has chloroplasts, numerous ribosomes, an endoplasmic reticulum, and a cell wall. What type of cell is this?
Answer:
The cell with chloroplasts, abundant ribosomes, plus an endoplasmic reticulum, and a cell wall is of the plant cell type.
Explanation:
Plant cells are eukaryotic cells found in all plants, with specific characteristics given their ability to be autotrophic and use solar energy to synthesize their nutrients. The presence of many ribosomes and a developed endoplasmic reticulum is due to their high capacity for plant protein synthesis.
One characteristic that differentiates plant and animal cells is the presence of a cell wall, which surrounds the cell membrane, and chloroplasts. Chloroplasts are responsible for making the process of photosynthesis possible.
Does the absence of one organism or two in the food chain change or affect the producer or consumer relationship?
Answer:
yes
Explanation:
Please help. This is due today :(
Label the following.. Word bank is below
2
If an organism has 15 chromosomes in a single sperm cell, how many
chromosomes would reside in its somatic cells?
O 15
O 30
0 7.5
45
Answer:
i just think but not sure
the answer is 30.....
I think but not sure
clarify and tell whether I am correct or not
HELP HELP HELP ASAP ILL GIVE 100 points
Answer:
What's the question you need help with?? I will try my best to help. I'm not taking free points btw. I'm just wondering on what your question is
this
The fish in the blue food
chain is a tertiary consumer.
What is another term for
"tertiary consumer"?
A. detritivores
B. autotrophs
C. third level consumer
D. fourth level consumer
C) third level consumer
where are the oldest epidermal cells found
Answer:
stratum basale
The oldest epidermal cells in the epidermis are found in the stratum basale.
Explanation:
hope the answer was helpful..
ncreased use of electricity has had a negative impact on the environment by
increasing
A. farmland
B. electric cars
c. air pollution
D. available food
The passive movement of particles from a region of higher concentration to a
region of lower concentration is known as...
A. Diffusion
B. Active Transport
C. Osmosis
D. Selective Permeability
Answer:
Answer is A. Diffusion
Explanation:
Because diffusion is a passive process in which a substance moves from a higher concentration to a lower concentration until the concentration becomes equal
The passive movement of particles from a region of higher concentration to a region of lower concentration is known as diffusion. Thus, the correct option is A.
What is Diffusion?Diffusion may be defined as the passive movement of particles from a region of higher concentration to a region of lower concentration.
Active transport requires energy for the movement of particles. Selective permeability may be defined as the ability to differentiate the movements of different types of particles in and out of the membrane.
Therefore, the correct option for this question is A.
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describe how and where carbondioxide enters the leafe?
Answer:Carbon dioxide cannot pass through the protective waxy layer covering the leaf (cuticle), but it can enter the leaf through an opening (the stoma; plural = stomata; Greek for hole) flanked by two guard cells. Likewise, oxygen produced during photosynthesis can only pass out of the leaf through the opened stomata.
Explanation:
(HELP ME PLEASE ILL GIVE BRAINLIEST)
A medical imaging scan that includes a patient's right lung, heart, and left lung is examined. The scan doesn't indicate in which plane it was taken. Based on the contents of the image, which plane can be ruled out automatically?
A. The sagittal plane
B. The transverse plane
C. The coronal plane
D. The anatomical plane
Answer:
I believe the answer is C.
How do you know that vinegar was diffused into the cubes
Name a structural difference between triglycerides and phospholipids
Answer:
Phosphate group is the structural difference between triglycerides and phospholipids. A triglyceride contains three fatty acids attached to the glycerol backbone whereas a phospholipid has two fatty acids and a phosphate group attached to the glycerol.
Explanation:
Which of the following is NOT a statement from the cell theory?
O All cells come from pre-existing cells.
•All cells require water for survival.
•All living things are composed of cells.
•Cells are the basic unit of structure and function of living things.
Answer:
The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells.
Therefore, B is the answer.
"All living cells require water for survival" is NOT a statement from the cell theory.
All cells require water for survival is not a statement from the cell theory.
What is cell theory?The cell theory is a fundamental principle in biology that states that all living organisms are composed of one or more cells and that the cell is the basic unit of life. The theory was first proposed by German scientists Matthias Schleiden and Theodor Schwann in 1839, and later refined by Rudolf Virchow in 1855. The three main principles of the cell theory are:
All living organisms are composed of one or more cells.The cell is the basic unit of life and structure for all living organisms.All cells come from pre-existing cells through the process of cell division.The cell theory is considered one of the most important and enduring concepts in biology, and it forms the foundation for understanding the structure and function of cells and the organization of life on Earth.
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In eukaryotic organisms, DNA transcription occurs in the _______ of a cell.
A.
mitochondria
B.
ribosome
C.
nucleus
D.
cytoplasm
Answer:
In eukaryotic organisms, DNA transcription occurs in the nucleus of a cell.
Which of the following is an example of weather?
Answer:
Thunderstorms in New York at 3:00pm is an example of weather.
Explanation:
Answer:
a
Explanation:
STATION 4 Cell Theory Select the answer choice with increasing levels of organization. R. Tissue, Organ System, Organ, Population S. Cell. Tissue. Organelles, Organ System T. Cell. Tissue, Organ, Organ System V. Organ System, Organ, Cell, Tissue
Answer:
The answer is S.
A diagram that is used to show the loss of energy as you go forward in a food chai
a.) food web
b.) energy pyramid
c.) concept map
d.) trophic levels
Answer:
tropical levels ........
The descriptive term for plants that are sturcturally adapted to withstand protracted dry conditions is ___________.
Answer:
Xerophytic
Explanation:
It is xerophytic and it is gotten from Greek word, Xeros( dry) and phutons(plants). It is an adaptive term that is use to describe plants species that posses structural adaptive features which make them to adapt and survive in areas where there is little water or dry region like desert, or area covered with ices by possessing some mechanism which help them to reduce water loss or concerns water. Examples include cactus, pineapple and some Gymnosperm plants. Some of these plants species posses extensive root system and their leaves are reduced to cacti which does not support water loss.
help! my mom said im grounded if I don't get a good grade
Answer:
I think c
Step-By-Step equation
sorry if u get it wrong i tried my best
Humans deplete the most resources when
Answer:
Resource depletion is the consumption of a resource faster than it can be replenished. Natural resources are commonly divided between renewable resources and non-renewable resources (see also mineral resource classification). Use of either of these forms of resources beyond their rate of replacement is considered to be resource depletion. The value of a resource is a direct result of its availability in nature and the cost of extracting the resource, the more a resource is depleted the more the value of the resource increases. There are several types of resource depletion, the most known being: Aquifer depletion, deforestation, mining for fossil fuels and minerals, pollution or contamination of resources, slash-and-burn agricultural practices, Soil erosion, and overconsumption, excessive or unnecessary use of resources.
Resource depletion is most commonly used in reference to farming, fishing, mining, water usage, and consumption of fossil fuels. Depletion of wildlife populations is called defaunation.
Explanation:
Which describes bedrock?
o consists of solid rock
o lies directly above the soil layer
o does not contain weathered rock
o forms from decomposed material
Answer:
consists of solid rock
Explanation:
bedrock contains only solid rock unless you are talking about a different type of bedrock this bed is called saprolite. saprolite contains severly weathered rock and lies above the solid layer of bedrock
Answer:
a
Explanation:
Your friend tells you that there is no starch in the homemade cookies she gives you. You like her, but you are not too sure that she really knows what ingredients might or might not contain starch. When you get the cookies home, what test could you do to quickly test to see if there was starch in the cookies?
Answer:
add iodine solution and look for a color change. If starch is present the color change should be blue/black
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From cells to major organ systems, the architecture of the body and the functions the body can perform are very closely related. Can you identify body cells, tissues, organs, systems that demonstrate this relationship and discuss its significance?
Explanation:
body cells- intake the nutrients and specialized into to carry function.
tissues- have similar structure to function well in body like, connective tissue, muscle
organs- carry different identity of function in body like, heart(to pump blood) kidney( for filter and excrete wastes
Which of the following is the best choice to demonstrate the levels of orgaization in plants? PLEASE HURRY ILL REWARD YOU!!!!!
A. leaf-> tree-> xylem-> plant cell-> shoot system
B. tree->leaf ->plant cell ->xylem -> shoot system
C. plant cell-> xylem -> leaf-> shoot system -> tree
D. shoot system->xylem -> leaf-> plant cell-> tree
Answer:
B
Explanation:
Answer:
B. tree->leaf ->plant cell ->xylem -> shoot system
Explanation: