Answer:
true
Explanation:
diffused light is scattered light
Chromosomes from each homologous pair are randomly sorted into daughter cells in a process called
amount of
This gives them a greater
A. Meiosis 1. divisions
B. crossing over, chromosomes
C. Independent assortment, genetic diversity
D. DNA sorting, accuracy
Reset Selection
Answer: A. Meiosis 1. division
Explanation:
Meiosis is a division process in reproducing sex cells
Chromosomes from each homologous pair are randomly sorted into daughter cells. This give them a greater meiosis 1. Divisions. The correct option is A.
What are chromosomes?Chromosomes are long thread like structure, they are present in pairs and the pairs are attached to each other by centromere. They contain genes.
The meiosis is the process of producing germ cells. When sperm and egg fuse, the chromosomes from each parent are taken into the daughter cell.
Thus, the correct option is A. Meiosis 1. Divisions.
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Q. Habitat loss occurs due to agriculture, forestry, and other human activities. Describe the effect of these activities on species diversity in the ecosystems in which they occur, and how this would affect the stability of these ecosystems over time.
Answer:
Explanation:
Human activities had led to diversity of species in ecosystem. Some of the species of animal have been lost and displace due to human activity such as deforestation, construction, company establishment.
Clearing of land for agriculture use has also contributed to diversity that occur in the habitat of an animal.
Diversity of an habitat leads to an unstable ecosystem, as animals can no longer thrive and live in their environment, some species of animals are lost including important species in the environment in the process and others struggles to survive.
Reduction of human activities in animals natural habitat can help restore diversity.
Most primates are arboreal, and living in this environmental context poses great challenges. Describe at least one specific problem or challenge a primate might encounter in a forested environment (consider things like movement, finding/accessing food, and finding mates).
Answer:
The main problem will be "habitat distraction".
Explanation:
The primary idea to all the combustion as well as cleaning up of boreal rainforests, which also generate excrete least 20% of global emissions that contributes to having some changed climate, and even the scavenging of animals for fruit and vegetables as well as illegal trade in the life of wild animals. For decades, we always expressed concerns more about the danger of primates, however now we just have strong evidence to demonstrate that the problem is much more serious than anyone expected.Explique la importancia e incidencia del buen funcionamiento de las hormonas en el cuerpo del ser humano y que consecuencias puede tener si hay alteración en el nivel hormonal
Answer:
Las hormonas activan vías de señalización celular, con lo cual regulando el crecimiento, metabolismo y reproducción del organismo
Explanation:
Las hormonas son moléculas mensajeras que circulan a través del torrente sanguíneo para llevar a cabo diferentes funciones. Estas moléculas se unen a receptores específicos presentes en la superficie de las células con la finalidad de controlar diferentes aspectos de su funcionamiento. Las hormonas son principalmente producidas por glándulas endocrinas pero también pueden ser secretadas por células intersticiales y epiteliales.
Las hormonas se dividen cinco clases principales:
a- pequeños neurotransmisores implicados en el funcionamiento del sistema nervioso (gonadotropina, somatostatina)
b- derivados de aminoácidos que también tienen funciones neuromotoras (dopamina, catecolamina)
c- proteínicas asociadas a funciones metabólicas y del desarrollo (insulina)
d- hormonas esteroideas derivadas de colesterol (estrógenos) que regulan el desarrollo de las características reproductivas y metabólicas e inmunológicas
e- hormonas derivadas de vitaminas liposolubles A y D (retinoides) vinculados a mecanismos que previenen el envejecimiento celular
Messages sent by the brain to the endocrine system pass
O A. from neuroendocrine cells to glands via action potentials
O B. from neurons to neuroendocrine cells via neurotransmitters
O C. from neurons to neuroendocrine cells via action potentials
O D. from neuroendocrine cells to neurons via hormones
O C. from neurons to neuroendocrine cells via action potentials
Answer:
from neurons to neuroendocrine cells via neurotransmitters.
Explanation:
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After getting the slide and microscope ready, Stella is eager to see the microscopic pond water specimen! She crouches around her microscope and aligns her eye with the microscope’s eyepiece. But she's only able to see a bright white light. At this point, no specimens or cells are visible on Stella's pond water slide. After taking a moment to collect her thoughts, Stella realizes she can't see any lifeforms because a.the microscope is not yet in focus b.the microscope is not plugged in c.there are no specimens on the slide d.she hasn't fastened the slide to the stage
Answer:
she hasn't fastened the slide to the stage
Explanation:
In Microscopy even if the slide is not yet in focus,she will be able to see part of the slide which may appear as transparent image.Therefore this is a wrong answer.
If the microscope is not plugged it light can not come up.
If there are no specimen on the slide,the slide will still as transparent image at the focus.
No doubt Stella forgot to fasten the slide to the stage.,therefore the specimen on the slide was not in focus of the objective lens,rather she was focusing on the stage only,hence the visible white light.
Students make these mistakes in microscopy,they sometimes place the slide on the stage,but forget to fasten the stage clip,thus the slide is not in focus of the incident light,which gives no reflection to the viewer's eyes.
how are the respiratory and circulatory systems connected
Answer:
The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
The respiratory and circulatory systems bring oxygen and nutrients to the cells. The respiratory and circulatory systems work together to maintain homeostasis. The respiratory system moves gases into and out of the blood. The lungs contain the bronchi, bronchioles, and alveoli.
The circulatory and respiratory systems work together to maintain homeostasis.
which of the following is an adaption that helped plants survive on land? A. a bony skeleton B. a diploid form C. photosynthetic cells D. formation of a cuticle
Answer:
D
Explanation:
The cuticle of a plant helps protect its aerial epidermis from things like environmental stresses and desiccation.
Answer:
D
Explanation:
8.
Scientists must be able to do which of the following?
understand other subjects much better than science
Past Due: Wed 07/01
ng in Science
create good hypotheses based on research
Past Due: Wed 07/01
Design
do experiments without background research
ast Due: Thu 07/02
eg Results
test multiple hypotheses in one experiment
st Due: Thu 07/02
Answer:
i think they must be able to create good hypothesis based on research.
they must be able to create good hypothesis based on research.
Explanation:
Compare and contrast the reproductive cycles of a flowering plant and a human. Include two similarities and two differences in your answer.
Answer:
Similarities: 1) They both reproduce sexually by fertilization 2) They both have male and female reproductive parts
Differences: 1) Plants can either be monosexual or bisexual while humans are always bisexual
2) Plants employ double-fertilization while humans don't
Explanation:
All organisms including plants and humans have to reproduce in order to produce young generations. However, there are similarities and differences between the reproductive cycles of these organisms. According to the question, we'll be comparing and contrasting reproduction in flowering plants and humans.
SIMILARITIES:
Both flowering plants and humans have sexual means of reproducing, which involves fusion of male and female gametes to produce a ZYGOTE, a process called FERTILIZATION.
Also, the opposite gametes that fuses during fertilization are produced by distinct male and female parts on both flowering plants and humans. For example, the anther produces the pollen containing the male gametes, while the ovary produces the egg cells in flowering plants. The testes and ovary produce the sperm and eggs in humans.
DIFFERENCES:
Flowering plants can either be monosexual i.e. bear both male and female reproductive structures on same plant or bisexual i.e bear the different reproductive structures on different plants. Humans are always bisexual i.e. they bear different reproductive structures depending on the sexuality.
A phenomenon unique to flowering plants called Double Fertilization occurs. This is a process whereby a triploid endosperm is formed from the fusion of two haploid nuclei with a sperm cell. This process only occurs in flowering plants and is absent in human reproductive cycle.
Which of the following are ways that DNA can undergo mutation? A. During DNA replication, the wrong base is added to the strand as it is being built. B. A virus inserts its DNA into the DNA of another organism. C. High-energy waves like UV light or radiation physically damage the DNA. D. A repair DNA polymerase fixes a damaged DNA strand.
Answer: Option C.
High-energy waves like UV light or radiation physically damage the DNA
Explanation:
Mutation is the change or alteration that occur in the DNA sequence or nucleotides sequence of an organism which is caused by mistakes when the organism is copied or environmental factors such as UV light.
Ultraviolet light cause mutations by activating the SOS repair systemof which is a part of i a new DNA polymerase that has no power to edit e but has the ability to move past the thymine dimer and synthesize DNA, This lead to cells able to replicate but with a high frequency of mutations.
Scientists use statistics to
- all of the above
- graph data.
- analyze data
communicate ideas to each other.
A. Mitochondria
B. Converts energy
in the cell
C. Stores food and
water in the cell
D. Mitochondrion
What letter does not belong in each group and explain your thinking ?
Answer:
from the first Table ....letter c is not involved because mitochondria is the plural of mitochondrion which is the power house of the cell ...its used to convert energy in the cell
From the second Table ....letter C is not involved because it's not part of the cell theory as proposed by other options
Population
250
200
175
150
Number of Rats (in thousands)
125
100
100
90
76
75
50
130
45
SO
25
110
O
1
2
3
5 6
7
8
10
Year
Based on the graph, at what time did the rat population meet the carrying
capacity of the habitat?
A. Year 5
B. Year 8
C. Year 6
D. Year 2
Answer:
b
Explanation:
i took this before and i know its b
A certain drug is made from only two ingredients: compound A and compound B. There are
6 milliliters of compound A used for every
5 milliliters of compound B. If a chemist wants to make
726
milliliters of the drug, how many milliliters of compound B are needed?
A certain drug is made from only two ingredients: compound A and compound B. There are 5 milliliters of compound A used for every 4 milliliters of compound B. If a chemist uses 255 milliliters of compound A, how many milliliters of the drug will be made?
----------------------------------
4:5 is the same as 4x:5x where 4x is compound A and 5x is compound B.
---
Solve for "x":
If amount of compound A is 4x = 255
x = 255/4
------------------------------
Then amount of compound B is 5x = 5(255/4) = 318.75 ml
=========================
Cheers !!!
===============
Which of the following actions involves voluntary muscle movement? A.movement of food through the digestive tract B.movement of blood through the blood vessels C.beating of the heart D.making of faces
Answer:
D. Making of faces
Explanation:
Voluntary muscle movement is where us humans can choose to move and control how our muscles move.
The first three answer choices are involuntary, since the body does that itself without us controlling it.
However, making faces is voluntary and we choose to do that.
Making of faces is the action that involves voluntary muscle movement. Therefore, the correct option is D.
What is voluntary muscle movement?Voluntary muscle movement refers to the controlled, conscious contraction and relaxation of muscles that result in specific movements or actions.
This type of movement is initiated and directed by the conscious decision-making processes of the brain, and requires the activation of nerve cells that stimulate the muscles to contract.
Examples of voluntary muscle movements include movements such as walking, running, jumping, lifting objects, playing sports, making different type of faces and performing other types of physical activities. Therefore, the correct option is D.
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Smurfs live in widely separated groups and rarely interbreed, so geneticists know very little about them. On one occasion, two smurfs from different groups did mate. A big-footed, white smurf mated with a small-footed, blue smurf. Three offspring resulted: one big-footed and blue and two small-footed and blue.Which statement about the inheritance of color in smurfs is most likely to be correct?
Answer:
See the answer below
Explanation:
The most correct statement would be that the blue color is dominant over the white color.
According to Mendelian law, when there are two different versions of the same gene/trait in which one is dominant and the other is recessive, the dominant version will be expressed while the recessive version only stays in the background.
In this case, the alternate versions of the same trait in the smurf are the white and blue colors. When they are mixed together in the offspring, the blue color is expressed and the white color stays in the background. It means the blue color is dominant over the white color.
2. How might a mutation that causes a single letter change in the DNA sequence affect
your protein structure and function?
Answer:
A mutation that causes a single letter change in the DNA sequence can affect your protein structure and function because the sequence of letters in a gene determines the sequence of amino acids in the protein that it encodes. A single letter change in the DNA alters the mRNA which alters the amino acid sequence of the resulting protein and sometimes that can cause serious results if it changes the way a protein works.
ex. sickle cell disease - a single letter swap in the gene that encodes the hemoglobin molecule results in deformed red blood cells
Hope that helps.
Which scientist performed an experiment with curved-necks flasks in order to further support the results of Redi's experiment? A. Louis Pasteur B. Charles Darwin C. Ludwid Hirszfeld D. Stephen Hawking
Answer:
The answer is A. Louis Pasteur
Explanation:
Countinuing Redi's experiment, Pasteur said that if spontanous generation had been a real thing, the germs would have eventually found its way back into the broth, but it couldn't since the curved neck of one flask blocked the germs.
Which led to the formation of oceans after water on Earth’s surface evaporated? The sun released a strong burst of water vapor. As Earth cooled, water in the atmosphere condensed. Materials collided due to strong gravitational forces. The ozone layer formed to protect against harmful UV ray exposure.
Answer:
As Earth cooled, water in the atmosphere condensed.
Explanation:
B edg 2020
The process that led to the formation of oceans is, as Earth cooled, water in the atmosphere condensed.
Water cycleThe process that led to the formation of oceans after water on Earth’s surface evaporated can be explained using water cycle.
The evaporated water from the Earth's surface move into the atmosphere where it condenses before precipitating inform of rain. The precipitated water forms a large body of water known as ocean.
Thus, the process that led to the formation of oceans after water on Earth’s surface evaporated is as Earth cooled, water in the atmosphere condensed.
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When does the exponential growth of a population stop?
Answer:
When the population reaches its carrying capacity.
Explanation:
As a population grows, there is more competition for resources which can limit a population. There are also natural disasters that can play a role too such as disease. Another factor that is part of carrying capacity is the size of the habitat. If there is no room, then the population cannot increase.
Answer: When the organisms compete
Explanation:
ap3x
The burrowing owl is found in dry, open areas such as grasslands, prairies, savannas, deserts, farmlands, golf courses, and other urban areas throughout most of western United States and Florida, Central America, and most of South America. It makes its home in burrows of other animals and primarily eats insects and small rodents. As humans build more cities, nearby burrowing owl habitats change due to destruction of burrows and loss of prey. Which is the least likely outcome of the habitat changes that are described?
Answer:
its population would increase
Explanation:
it says the least likely outcome which is the population increasing
Answer:
C
Explanation:
Both the ER and Golgi have folds. what is the advantage of folds on an organelle? A. Increased surface area B. Increased volume C. Increased density
Answer:
A) Increased surface areas.
Explanation:
THe larger the surface area, more space available for chemical reactions.
A person in a dark room looking through a window can clearly see a person outside in the day light . But a person outside cannot see the person inside
Explanation:
The explanation for this is that the space outside is illuminated with light from the sun. The person inside has either a lesser or no illumination at all. The dark inside room appears dark, and darkens the surface of the window facing inside, making it act like the silvered surface of a mirror. When the outside observer looks at the window, the window acts as a mirror, reflecting the light from the sun onto the eyes of the outside observer. For the inside observer, some of the illumination from outside finds its way inside, since the outside window surface is well lit, carrying with it the sensation of vision onto the eyes of the inside observer.
Do you know the Transcription factor name for lapF and naphthalene dioxygenase?
Answer:
The LapF gene encodes one of the largest proteins from Pseudomonas putida, it is required for the bacterial colonization on the solid surfaces; while naphthalene dioxygenase is an enzyme required for the process of aerobic degradation of naphthalene.
Explanation:
LapF is a gene of Pseudomonas putida that is critical during the process of plant root colonization. Mutations in this gene have shown to reduce the ability to colonize plant tissues. On the other hand, the naphthalene dioxygenase gene is also encoded by the genome of Pseudomonas strains. The naphthalene dioxygenase protein catalyzes the hydroxylation of different substrates, however, this enzyme is widely known for acting during the degradation of naphthalene, an organic chemical compound that is toxic in humans.
How are plant and animal cells different?
Answer:
Plant cells have chloroplasts and a cell wall while animal cells don't. Animal cells are also more rounder, while plant cells have more of a rectangular box-like shape. There are more differences, but these are some of the main ones.
Hope this helped! :)
Answer:
The main difference between these cells is the that a plant cell has a cell wall and a rigid shape while an animal cell lacks a cell wall and its shape is circular.
Explanation: The plant cell has a robost and rigid shape due to the cellulose found in the cell wall. It's also important to note that a plant cell has a larger vacuole than that of an animal cell.
Organisms are made up of one or more _____. energies cycles cells clones
Answer:
Cells
Explanation:
━━━━━━━☆☆━━━━━━━
▹ Answer
cells
▹ Step-by-Step Explanation
All living organisms are made of cells. There are single cellular organisms, and multicellular organisms.
Hope this helps!
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Which of these biomes tends to receive the most rainfall?
O A. Boreal forest
O B. Rain forest
O C. Tundra
O D. Taiga
Answer:
O B. Rain forest
Explanation:
In the fossil record, there is no evidence of anything living on land before plants. Why are plants necessary before more complicated animals can evolve?
A. Plants were not needed.
B. Plants were needed to produce Carbon dioxide.
C. Plants were needed to change the soil content.
D. Plants were needed to produce oxygen.
Answer:
maybe option D is correct
Plants are necessary before more complicated animals can evolve because plants were needed to produce oxygen. The correct option is D.
What is the fossil record?The fossil record is the preserved remnants of plants and animals that are found in the layers of the earth's crust. They give information about organisms present in old times.
Plants give oxygen, food, and shelter to the organism, so it is necessary for surviving of organisms.
Thus, the correct option is D. Plants were needed to produce oxygen.
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Dinobryon is a species of protozoa that reproduces asexually. How is it better for the survival of the species for the protozoa to reproduce asexually instead of sexually? A.They do not use up any energy finding mates. B.They use more cellular energy in reproduction. C.They have less genetic diversity in their populations. D.Their populations do not grow too quickl
Answer:
A. They do not use up any energy finding mates.
Explanation:
The asexual reproduction consists of one parent which are same to each other while on the other hand consists of two parent that produced unique.
For species survival, the reproduction of protozoa asexually rather than sexually could be better when they don't use much time and energy for determining the mates
Therefore in the given case the correct option is A.
Answer: A.They do not use up any energy finding mates.
Explanation:
I just did it on a p e x and i got it correct