Answer:
d) 0.3 microns or smaller
Which of the following illustrates the principle of induction in invertebrates?
A. In an embryo, the presence of a notochord beneath the ectoderm results in the formation of a neural tube.
B. A neuron synapses with another neuron via a neurotransmitter.
C. Eye muscles constrict in response to light.
D. Secretion of TSH stimulates the secretion of thyroxine.
E. The maternal parent induces spontaneous expression of recessive genes.
Answer:
A
Explanation:
A
How does the ectoderm that will make up the future eye know to develop into an eye? The cells are "told" to develop into an eye because the nearby retina releases chemical signals that direct the development of the cells. This process is called induction. Choice A depicts a similar situation. The notocord releases chemical signals that tell the overlying ectoderm that it is time for it to become the neural tube. None of the other choices depict the process of induction.
which of the statements accurately describes how water moves through earth and its atmosphere
Answer:
A. Liquid water falls from outer space and is absorbed or d*unk by living things. It then evaporates into the atmosphere and forms clouds, which float into space.
What is the most interesting
Or surprising thing you learned about the universe and galaxies?
Sperm and eggs are found in different parts of plants. Explain why it is important for these
cells to unite, and describe some factors in an environment that help unite them.
Explanation:
When sperm and eggs in plants are united they fertilize the egg creating a plant able ready seed. Some factors in an environment that help them unite are; (animals) bees, butterflies, and other insects. wind bringing pollen around
When sperm and egg (found in different parts of plant) unite fertilization takes place which results in the formation of a zygote and later it forms an embryo.
Some factors in an environment that help unite them are air, water, insects, birds, bats etc.
What is sperm?"Sperm is defined as male reproductive cell. In case of plants, it is known as male gametophyte (pollen)."
What is egg?"Egg is defined as female reproductive cell. In case of plants, it is known as female gametophyte (ovum)."
What is fertilization?"Fertilization can be defined as the fusion of the male gametes (pollen) with the female gametes (ovum) to form a diploid zygote."
What is a zygote?"A zygote is a cell formed by the union of two gametes."
What is embryo?"A plant embryo is an undeveloped plant inside a seed."
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What are the four features of minerals? (use complete sentences and your own words.)
(NO LINKS PLEASE)
Answer:
1)All minerals are naturally occuring.
2)They have to have a crystalline structure and a definite chemical composition.
3)They are inorganic.
4)They are a solid.
Explanation:
1-You have to find a mineral in the nature. It cannot be created in a lab.
2-Crystallline structure is the ordered arrangement of ions, molecules, or atoms in an object.
3-Inorganic means that the object has not bonded with carbon.
4-Solid means that it is not fluid and is hard and stable.
Hope this helps! :)
Describe the nutrient cycle. How does soil contribute to this cycle?
Answer:
The nutrient cycle is a system where matter and energy are transferred between living organisms and non-living parts of the environment. This occurs as animals and plants consume nutrients found in the soil, and these nutrients are then released back into the environment via decease and spoilage
Which statement describes the energy involved in diffusion?
Diffusion requires energy in all cases.
Diffusion requires energy only to move material in through the cell membrane.
Diffusion does not require energy in any situation.
Diffusion requires energy only to move material out through the cell membrane.
Answer:
Diffusion does not require energy in any situation.
Explanation:
Diffusion does not require energy because it is a form of passive transport.
Very fast brainlist
One person consumes the equivalent of five cows per year. Five cows consume a total of 39 million Calories of vegetation per year. One person only needs one million Calories a year to survive. Which statement best describes the efficiency of energy transfer in this scenario?
It is very efficient because the person can eat less.
It is inefficient because less energy is needed at the top.
It is very efficient because most energy is made by producers
Only a portion of energy from vegetation makes it to a person.
Answer:
It is very efficient because the person can eat less.
Explanation:
the common knowledge answer
Only a portion of energy from vegetation makes it to a person. The correct option is D.
What is energy efficiency?The definition of energy efficiency is the use of less energy to carry out a task or achieve a goal.
Ecological efficiencies at each trophic link determine the food chain efficiency (FCE), which is calculated as the percentage of energy fixed by primary producers that is transmitted to the top trophic level.
The energy supply accessible to trophic level N+1 divided by the energy used by trophic level N is the definition of ecological efficiency.
Only a percentage of the energy from vegetation makes it to a person, which best sums up the efficiency of energy transmission in this situation.
Thus, the correct option is D.
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_______ tells your cells what to do.
A. Genes
B. parent cells
C. white blood cells
D. Mitochondria
Genes :- they contain stored information which then orders cells through the process of translation
In general, bacterial
cells are prokaryotic.
Which cells are eukaryotic?
a. Bacterial cells
b. Animal and plant cells
( it’s b )
Answer:
B . Animal and plant cells
Animal and plant cells are eukaryotic cells.
What are Eukaryotic cells?The region One of the three realms of life is eukaryote; the other two are bacteria and archaea.Organelles that are membrane-bound and found in eukaryotic cells include the nucleus, mitochondria, and endoplasmic reticulum. Protozoa, fungi, plants, and animals are examples of eukaryotic cell-based organisms. The biological domain Eukaryote is where these species are categorized.Animals, fungi, protists, and plants are eukaryotic cells examples. They have chromosomes, which organize their genetic material.Since prokaryotic cells lack a membrane-bound nucleus, eukaryotic cells are the main difference between these two types of creatures. Eukaryotes store their genetic material in their nuclei.learn more about eukaryotic cells here: https://brainly.com/question/13969093
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Brown hair is dominant and blonde hair is recessive.
What percent of the offspring will have blonde hair if the parents have the following alleles?
BB
Bb
A. 75
B. 25
C. 50
D. 0
E. 100
Answer:
If we assume B = Brown and b= blonde, Phenotypically the percent of offspring having blonde hair is D. 0
Explanation:
Which one of the following is NOT a
characteristic of livings things?
A. must grow and develop
B. must be made of more than one cell
C. must be able to reproduce
D. must have a universal genetic code
Going long does carbon dioxide last
Answer:
carbondioxide last in about 300 to a 1000 years in the atmosphere
3
Which of the following statements are true? Choose more than one
answer.
Oxygen is the most abundant gas in Earth's atmosphere
Gases in the stratosphere protect living organisms from solar
radiation
Wavelength affects the color of light
Gases are thicker in the upper levels of the atmosphere
Not all wavelengths of light are scattered by atmospheric
gases
Earth's atmosphere absorbs blue light most efficiently
Answer:
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Explanation:wfnwkfnskfnds
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Which one is warmer a normal year or El nino year?
what is cell and what are cell organalles
Answer:
a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body
so it is like a cell that works in the body but its a (organelles) in side the cell working in it like it is the cell in side the body
hello help me with this question thanks in advance don't spam
Answer:
Explanation:
Advantages to community:
1. Geothermal energy is a renewable energy resource because heat extracted is very small compared to the Earth's heat content.
2. It is reliable and constant source of energy as it can extracted all through the year despite changing weather patterns.
3. Geothermal energy is widely available and it creates new job opportunity.
Disadvantages:
1. Cost of installation of geothermal heat pumps are high.
2. This power plants plants are suitable to particular region and they are far from cities.
Advantage to the environment:
1. It is echo friendly and non-polluting from production to use.
2. Geothermal plants occupy a less space, no-mining or no transportation is require and thus protects the natural environment.
3. There is no wastage or by -products.
Disadvantage:
1. This power plants may trigger earthquakes.
2. Power plant uses lot of water in its processes.
Which of the following best describes the relationship between the level of genetic
variation and adaptability?
Answer:
All adaptations are variations and all variations help organisms survive
Explanation:
hope this helps
(i need some help here pls)
Before uniformitarianism, what theory was widely accepted?
1.) Uniformitarianism is the only theory
2.) The law of superposition
3.) Catastrophism
Answer:
3.)CATASTROPHISM
Explanation:
catastrophism suggested the features seen on the surface of earth such as mountains,were formed by large abrupt changes or catastrophes
please help me what organism is the secondary consumer ?
Answer:
I believe it is the fox
Answer:
It would be most likey the worm dood.. most likely because he is a consumer that would gain his resources from the tree.
Explanation:
Homologous chromosomes may exchange segments; this is called crossing over. Crossing over increases genetic variability. When does crossing over occur?
Question 2 options:
Meiosis II
Mitosis
Both mitosis and meiosis--crossing over may occur at any time during the cell cycle.
Meiosis I
Question 3
In order for meiosis to create four, genetically different gametes, DNA replication must occur. Which of these best describes when DNA replication would occur?
Question 3 options:
prior to meiosis II
prior to meiosis I and meiosis II
prophase I in meiosis I
prior to meiosis I
Question 4 (1 point)
The embryo's development as seen here represents which processes in the development of any multicellular organism?
Question 4 options:
meiosis followed by mitosis.
mitosis and cell differentiation.
protein synthesis followed by meiosis.
meiosis and cell differentiation.
Question 5
Why do some organisms reproduce aseggsually?
Question 5 options:
To rapidly produce like offspring
To increase genetic diversity
To have a variety of offspring at the same time
To get rid of genetic problems while reproducing
A) Crossing over occurs in : Meiosis I ( D )
B) DNA replication would occur : Prior to meiosis I and meiosis II ( B )
C) The embryo's development represents ; meiosis and cell differentiation ( D )
D) Some organisms reproduce aseggsually ; To rapidly produce like offspring
What is Crossing over and DNA replication
Crossing over involves the swapping of genetic materials, and it occurs in prophase I of meiosis before meiosis II the crossing over of genetic materials are over. while DNA replication is the process whereby DNA make an exact copy of itself during the process of cell division and this process occurs prior to meiosis I and meiosis II
The development of an embryo in the missing diagram represents meiosis and cell differentiation.
Hence we can conclude that the answers to your questions are as listed above.
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Find a picture or video regarding optical illusions and post a link. Describe what is happening in the eye or brain that creates that illusion!
Optical illusion occurs when our brain and eyes miscommunication with each other.
Why Optical illusions occur?Optical illusions happen when our brain and eyes speak to each other in simple language but the interpretation gets mixed-up. For example, our eyes told the brain that something is moving but that's not what the eyes meant to say to the brain which leads to the creation of illusion.
So we can conclude that Optical illusion occurs when our brain and eyes miscommunication with each other.
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Explain why the pattern of differences
that exists from earlier to later fossils in the
fossil record supports the idea that evolution
has taken place on Earth.
Answer:
Different layers of fossils found in sedimentary layers of the earth show that past species have died off and adapted in order to survive.
Explanation:
HELP PLEASE!
In pea plants, petal coloration of has a complete dominance relationship where purplepetals are dominant over white petals. There are 276 plants, 273 have purple petals.Find: the frequency of the dominant and recessive alleles and the frequency ofindividuals with the dominant, heterozygous, and recessive genotype.
Answer: See below
Explanation:
In the selected pea plant population, there are total 276 plants out of them 273 have purple petals.
Remaining 276 - 273 = 3
q²= 3/276
q²= 0.010
q = 0.1
p + q = 1
p = 1 - 0.1
p = 0.9
Therefore:
Homo-zygous dominant = p² = 0.9×0.9 = 0.81
Hetero-zygous dominant = 2pq = 2×0.9×0.1 = 0.18
Homo-zygous recessive = q² = 0.1×0.1 = 0.010
form and function are related. describe how the form of the tracheal wall is related to its four functions
Given what we know we can confirm that the tracheal wall is related to its function in that it allows it to conduct air in a sealed manner and protect the individual.
What is the function of the trachea?The primary function of the trachea is to conduct air into the lungs. For this, the trachea is long and narrow, to allow air to flow in a directed manner towards the lungs. The trachea is also "armored" to protect this air flow and is lined with mucus to sweep away any unwanted particles from the air.
Therefore, we can confirm that the trachea is armored and lined with mucus along its long, tube-like shape, which allows this structure to conduct air in a safe, clean, and direct manner directly towards the lungs.
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horse is called a vertebrate reason scienc subjects
Answer:
Explanation:All animals with a backbone and skeleton are vertebrates. Horses have backbones and skeletons, therefore they are vertebrates. Animals without a backbone are called invertebrates. Hope this helps
HELP, define genetic engineering and Describe how DNA is modified for use in genetic engineering.
Answer:
Genetic engineering is deliberate modification of genome to gain desired traits.
The main steps of genetic engineering:
Restriction enzymes are used to isolate the required gene leaving it with sticky ends. Sticky ends are a short section of unpaired bases A vector, which is usually a bacterial plasmid or a virus, is cut by the same restriction enzyme leaving it with corresponding sticky ends. The vector and the isolated gene are joined together by ligase enzyme. The vector inserts the gene into required cells. The genes are transferred to animal, plant or microorganism cells, during early development, which allows them to develop with the desired characteristics.
Punnett square for rr and rr parents
How do creosote plants defend against predators?
by growing in hard-to-reach places
by growing sharp, stinging hairs over their bodies
by producing bad-tasting oil in their leaves
by producing deadly toxins in stems and leaves
Answer:
The answer should be By growing sharp, stinging hairs over their bodies.
Explanation:
what is is the attraction of water molecule to each other