Answer:
B. He was the first to observe live cells in a sample of pond water.
Explanation:
He was a self taught man that created the first microscopes which allowed him and others to see tiny organisms.
The other answers are not correct as Hans made the first microscope, cells existing in liquids were not a critical part of micro biology, and it was Schlieden and Schwann who created the cell theory that stated that all living things were made of cells.
Answer:
b
Explanation:
Many products and services were initially developed for space exploration. Which of these does NOT have a direct connection to space exploration? A. X-ray machine B. freeze-dried food C. infrared ear thermometer D. portable cordless vacuum
Answer:
freeze dried food is your answer
Answer: A x ray machine
Explanation:
there is no reason for an x ray machine for space exploration
A level in an energy pyramid is called a _______ level
Answer:
trophic
Explanation:
It's called a trophic level. Autotrophs are at bottom because they produce the food and then energy goes to herbivores and then carnivores.
Explain how an atom of carbon in the atmosphere becomes part of the muscle of the wolf.
Answer:
Explanation:
Carbon atoms in the atmosphere are in the form of CO2
Plants convert CO2 into simple sugars , animals eat the plants and use the sugars for fuel and building tissues like muscle
Identify whether the changes to biodiversity are natural or due to human intervention.
A mass extinction occurs after
several volcanic eruptions.
A species of wasp is outcompeted
by several other species and
goes extinct.
A population of grubs decreases
as the population of moles, a
predator of grubs, increases.
A species of wildflower goes
extinct after land is cleared
for agriculture.
Three populations of migratory fish
decline after the construction of
a hydroelectric dam.
The number of offspring produced
by a population of frogs decreases
after pesticides enter their pond.
Natural
Human Intervention
Read the information for transcription and then answer the question. Protein Synthesis Explain the process of transcription.
Answer:
Please find the explanation below
Explanation:
Transcription is the first process that occurs in protein synthesis. It involves the use of the stored information in the DNA molecule to synthesize a mRNA molecule.
Transcription, which occurs in the nucleus of eukaryotes and cytoplasm of prokaryotes, is catalyzed by an enzyme called RNA polymerase. RNA polymerase binds to the double-stranded DNA and begins to unwind it (Initiation). This unwinding causes the nucleotide bases to be exposed in order for the RNA polymerase enzyme to read.
The enzyme reads the bases of the DNA and begins to synthesize RNA nucleotides using the complementary base pairing rule (Elongation) i.e. Adenine base paired with Uracil base (RNA), and Guanine paired with Cytosine etc.
The single-stranded mRNA is released at the end of the transcription process (termination). This is basically what occurs in transcription.
The gene coding for the protein untwists and unzips.
RNA nucleotides form complimentary base pairs with the DNA bases.
Hydrogen bonds and sugar-phosphate bonds form and the mRNA strand is synthesized.
mRNA peels off the DNA and moves to the cytoplasm.
Analicen el cariotipo humano y den dos ejemplos de pares de cromosomas metacéntricos, dos ejemplos de pares telocéntricos y dos ejemplos de pares acrocéntricos.
Analyze the human karyotype and give two examples of pairs of metacentric chromosomes, two examples of telocentric pairs, and two examples of acrocentric pairs.
Answer: The test that is conducted to evaluate and identity the shape,size and number of chromosomes in cells of organism is called the Karyotype.
Metacentic chromosomes are X - shaped chromosomes. They have centromere at the middle, which makes the arms of the chromosomes equal in length. Therefore any type of chromosomes with equal length of arms is said to be Metacentic. Thus chromosomes on position 1,13, 16 , 19 and 20 are examples.
When a pair of chromosomes showed a regular segregation at anaphase of meiosis, they are said to be telocentric. They are type of chromosomes in which the centromere are located at the terminal ends of the chromosomes, with the telemeres extending from theses ends.Hence during segregation, the ends of telocentric chromosomes are orientated towards the poles of the cells. example is the alphabets ''i'' shaped chromosomes in mice and 29 pairs autosomes in Angora goats.
When the centromere is located in such a way that one arm lenght of a chromosomes is longer than the other, then this is called acrocentric. Example is chromosome 21 of down syndrome.others are 13, 14, 15, 22, and Y-chromosomes.
Explanation:
Bacteria convert nitrogen gas from the atmosphere into nitrates which are
usable by plants through a process called
Answer:
Nitrogen FixationExplanation:
The conversion of nitrogen gas into nitrates and nitrates through atmosphere, industrial and biological process is called nitrogen fixation. Atmospheric nitrogen must be processed, or 'fixed', into a usable form to be taken up by plant.
Why is nonpoint source pollution difficult to control?
Answer:
because it comes from the everyday activities of many different people, such as fertilizing a lawn, using a pesticide, or constructing a road or building.
Explanation:
Answer:
because it comes from the everyday activities of many different people, such as fertilizing a lawn, using a pesticide, or constructing a road or building.
Explanation:
edge
a. When a person gets a stroke or heart attack, brain or cardiac (heart) muscles die. Why is this a
problem?
The U.S. has sent unmanned spacecraft to _____ the planets in our solar system. A. all B. most C. some D. none of
Every planet in our solar system has been visited by an unmaned spacecraft sent by the United States. The launch years are given in this order
Venus (1962)Mars (1964)Mercury (1973)Jupiter (1977)Saturn (1977)Uranus (1977)Neptune (1977)Pluto (2006)Answer:c some
Explanation:
only a couple of planets have had unmanned spacecraft sent to them
The iodine changes color in the presence of
A starch
A hydrocarbon
A sugar
A protein
Answer:
The answer is starch.
Which of these is a function of estrogen in reproduction?
O A. Producing the endocrine system and hormones
B. Producing and maturing sperm
O c. Promoting the development of the adult female body
O D. Promoting the development of adrenal glands
SUBMIT
Answer:
Promoting the development of the adult female body
Explanation:
the explanation for this is weird... The primary function of estrogens is development of female secondary sexual characteristics...etc of parts of the female's body..
if u want more explanation lmk hope this helped
what are some examples of organic fertilizer
Answer:
Organic fertilizers
Examples of naturally occurring organic fertilizers include manure, slurry, worm castings, peat, seaweed and guano. Green manure crops are also grown to add nutrients to the soil. ...
Examples of manufactured organic fertilizers include compost, bloodmeal, bone meal and seaweed extracts.
Explanation:
HOPE IT HELPS : D
Enzyme activity within metabolic pathways is regulated by
O food consumption
O activators and inhibitors
O oxidation
O neurons
Answer:
activators and inhibitors
Explanation:
En que consisten las siguientes interacciones bioticas de las relaciones entre organismos: DEPREDACION, PARASITISMO, MUTUALISMO, COOPERACION, SIMBIOSIS, COMPETENCIA, COMENSALISMO, AMENSALISMO
Answer:
La depredación implica la interacción entre un depredador y una presa. El parasitismo ocurre entre 2 organismos diferentes donde un parásito se alimenta del huésped hasta que el huésped es destruido, el mutualismo ocurre es una forma de relación donde ambos organismos de diferentes especies se benefician. La cooperación se produce cuando los organismos trabajan juntos como un equipo para lograr objetivos comunes, como derribar a un gran depredador. En la simbiosis ocurre en diferentes organismos donde ambos se benefician o uno se beneficia o ninguno se beneficia a medida que interactúan. La competencia es la capacidad de un organismo para prosperar en entornos difíciles. El comensalismo es un tipo de relación que ocurre entre organismos donde uno se beneficia y el otro no se ve perjudicado. El amensalismo ocurre entre diferentes especies de organismos en una relación donde uno es destruido y el otro prospera.
Explanation:
La depredación ocurre en la cadena alimentaria donde los organismos más pequeños son consumidos por los más grandes en la cadena alimentaria. El depredador no puede sobrevivir si hay una reducción en la población de presas. Un ejemplo se ve en un león y un ciervo. En el parasitismo, el parásito solo puede sobrevivir cuando el huésped está vivo. Una vez que el huésped muere, el parásito muere con él. El parásito deriva todo su sustento del huésped hasta que el huésped es destruido. Ejemplo de garrapatas en perros. En mutualismo, ambos organismos de diferentes especies en relación obtienen los mismos beneficios. Un ejemplo es el del pájaro picador y la cebra, donde el pájaro picador obtiene su alimento de la cebra y la cebra controla sus plagas. La cooperación se produce entre las mismas especies que trabajan juntas para derribar presas más grandes. Se observa un ejemplo entre las hormigas que derriban una cucaracha. En el caso de la simbiosis, podría ser uno de los 4 tipos: comensalismo, mutualismo, parasitismo o endo / ectosimbiosis. Aquí los organismos de diferentes especies trabajan para lograr objetivos divergentes que a veces se ayudan mutuamente y otras veces se daña. La competencia se ve cuando un organismo posee características especiales que lo ayudan a sobrevivir en ambientes hostiles. Por ejemplo, algunas bacterias poseen cápsulas que les ayudan a almacenar alimentos y sobrevivir largos períodos de deshidratación, así como la presencia de determinantes de resistencia a los antibióticos que pueden ayudarlos a sobrevivir a un ataque de antibióticos. En el comensalismo, una especie vive de otra, pero la otra no sufre daños. Un ejemplo típico son las aves que viven en huecos de árboles. En el amensalismo, la presencia de una especie de organismo inhibe el crecimiento de otro. Un ejemplo es el de las malas hierbas en una granja de maíz. Las malas hierbas ahogan la planta hasta que se destruye para que puedan prosperar.
The bar chart shows the heights of pea plants grown from 500 pea seeds.What variation do the plants show?
A. Continuous variation only
B. Discontinuous variation only
C. Both continuous variation and discontinuous variation
D. Neither continuous variation and discontinuous variation
Answer:
C. Both continuous variation and discontinuous variation
Explanation:
this was the answer on my quiz a couple days ago
a population of white moths lives in a forest near a factory. this factory burns coal and pollutes the air with black dust. over time, this dust has settled on the trees in the area, making them darker in color. this could result in
1. an increase in the white moth population.
2. a decrease in the white moth population
3. an increase in the number of trees in the area
4. a decrease in the air pollution affecting the area
23. Which activity most directly involves the
process represented in the diagram below?
1. a gamete produced in meiosis
2. a white blood cell engulfing bacteria
3. a zygote being produced in an testes
4. a human repairing damaged tissue
a gamete produced in meiosis is the correct answer .
What is meiosis ?Meiosis is the process where a single cell divides twice to produce four four haploid daughter cells which are otherwise called as gametes; It can occur in two substages such as meiosis I and meiosis II.
Humans have 46 chromosomes in every cell, where 23 chromosomes t came from one of our parents and 23 very similar chromosomes that came from the other parents.
Meiosis I consist of substages like Prophase I where nuclear envelope disintegrates, Chromosomes begin to condense, Spindle fibres appear.
Secondly Prometaphase I where Spindle fibres attach to the centromere followed by Metaphase I where The homologous chromosomes align at the equatorial plate, Anaphase I where he homologous chromosomes move towards the opposite poles.
Telophase I where Spindle fibres disappear, Cytokinesis I where the cytoplasm and the cell division result in 2 non-identical haploid daughter cells.
For more details regarding meiosis, visit
brainly.com/question/11622266
#SPJ2
what is the name of the protective structure that forms around an embryo
Answer:
NUTRIENTS
Explanation:
Nutrients pass from the placenta through the umbilical cord, and the amnion, a fluid-filled membrane, surrounds and protects the embryo. The division of the body into the head and trunk becomes apparent, and the brain, spinal cord, and internal organs begin to develop.
Someone expressing a recessive hair color has _______.
A-1 dominant and 1 recessive allele for hair color
B-2 dominant alleles for hair color
C-2 recessive alleles for hair color
Answer: The answer would be C
Explanation: This is because in order to express a recessive trait one must have no dominant alleles or otherwise the dominant would win out and be expressed instead. For example, if a person had 1 allele for brown hair and 1 for red the brown would win and the same would happen if they had 2 brown hair alleles. Whereas if a person had two alleles for red hair and none for brown, only then would the red trait be expressed. Hope this helped!
which statement provides the best argument against making major changes to the atmosphere to help protect Earth's resources
Answer:
The options are
A. There will be less soil and dust in the air as construction increases.
B. The atmosphere will improve as more people move to large cities.
C. Making major changes to the atmosphere can be a costly process.
D. It is more important to protect land and water resources than the atmosphere.
The answer is C. Making major changes to the atmosphere can be a costly process.
Explanation:
Making major changes to the atmosphere to the atmosphere to help protect Earth's resources is costly because no one knows the effects of what the changes will have when effected. Another angle is effecting the changes will be a very expensive one as the atmosphere is very large and will be difficult having it happen.
This however validates making major changes to the atmosphere can be a costly process as the right option.
Answer:is c
Explanation:
it’s easy
What structures make up the male and female reproductive systems?
Answer:
Explanation:
Male
External genitilla (pair of testies in scrotum)
Copulatory organ for the transfr of sperms into female body.
Female
A pair of ovaries
Oviduct
Uterus
External genetilla(vagina).
How can chimpanzees have different traits from one another
Answer:
They have different genes just as humans do
Explanation:
Answer:
They have different genes just as humans do
Explanation:
Use the rose experiment to answer the question. What are the independent and dependent variables?
Answer:
Independent Variable - Amount of Light;
Dependent Variable - Plant Growth;
Controlled Variables - temperature, soil, container, and humidity
Explanation:
Independent Variable - Amount of Light;
Dependent Variable - Plant Growth;
Controlled Variables - temperature, soil, container, and humidity
1. Plants need light for it growth and development. By studying photosynthesis and chlorophyll one can recognizes two factors: measure of light and development of a plant.
The adjustment in light influences the development of a plant. Both the two factors are measurable.
Cause-Independent Variable: measure of light
Impact Dependent Variable: development of plant
2. Plants have stems that become upward and roots that become descending. Become familiar with geotropism.
Answer:
The rose experiment is not a specific experiment but refers to a general example used to explain the concept of variables in an experiment. In this example, let's say we want to study the effect of fertilizer on the growth of roses.
The independent variable in this experiment is the fertilizer. It is the variable that is manipulated or changed by the experimenter. In other words, the experimenter decides how much fertilizer to apply to each group of roses.
The dependent variable in this experiment is the growth of the roses. It is the variable that is being measured and affected by the independent variable. In this case, the experimenter measures the height, number of leaves, and number of flowers for each group of roses, and this data is used to determine if the fertilizer had any effect on the growth of the roses.
Therefore, in the rose experiment, the independent variable is the amount of fertilizer applied to each group of roses, and the dependent variable is the growth of the roses, measured by their height, number of leaves, and number of flowers.
In a modern hive of honey bee, honey is harvested from
Brood box
Top cover
The hive stand
The super
Explanation:
the process of groeing honey is Apiculture
function of the vacule
Can you guys plsssss help me with the questions plsss my assigment is already due plss help me guys!!!!!
Answer:
FOG stands for 'fats, oils and grease'. It is present infood products such as lard, butter, animal fats, vegetable oils, and dairy products.
FOG is prepared during the process of cooking and the washing up processes. When FOG is allowed n sewer pipes it can accumulates inside sewer pipes, so proper disposal method of FOG is required.
Some of the source of FOG and disposal methods are as following:
Cooking oil - Allow the oil to be cooled and place it in a non-recyclable container such as plastic-lined paper containers.
Food Scraps: compost bin can be used to dispose FOG by putting all food scrap into it.
Salad dressing - If little maount of salad dressing is left, use a paper towel to clean it and it will absorb the left residue which can be easily dipose in garbage.
Dairy products such as milk - it can be disposed on-farm or to a proper disposal site otherwise it will affect groundsurface as it contain fat.
Hence, using above methods for disposing FOG will help to save envrionment.
An organism may be multicellular or unicellular.
True
False
Does compost cause tomato plants to grow faster and taller than artificial fertilizer?
Answer:
Many farmers and gardeners compost their plant and animal waste. The living material naturally decays in compost bins, forming a dirt-like substance that's rich in nutrients. ... This fertiliser caused his plants to grow faster and taller than they grew in unfertilised soil, artificial fertiliser provides lacking minerals which also speeds up growth, it depends on the richness of minerals in the compost and the quality of artificial fertiliser
what is evolutionary mechanism?
pls help>-<
Answer:
Evolutionary mechanism refers to the changes in allele frequencies within a single population.
