Answer:
Animal cells contain lysosomes and centrosomes but plant cells don't
Explanation:
Lysosomes are basically like the vacuole in plant cells. Lysosomes in animal cells contain enzymes which help to break down substances such as proteins.
Centrosome is found near the nucleus of animal cells and it helps with cell division. It helps separate duplicated chromosomes into the 2 daughter cells.
ANSWER THIS QUESTION AND YOU'LL GET BRAINLIEST:
What process must metamorphic rocks undergo to become igneous rocks? (metamorphic rocks + ? = igneous rocks)
Answer:
If the newly formed metamorphic rock continues to heat, it can eventually melt and become molten (magma). When the molten rock cools it forms an igneous rock. ... Metamorphic rock can change into igneous or sedimentary rock. Igneous rock forms when magma cools and makes crystals
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In the process of ________, microbes detect the presence and density of other microbes and modify their metabolic activity in response.
In the process of Quorum Sensing, microbes detect the presence and density of other microbes and modify their metabolic activity in response.
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In which two chambers are papillary muscles found?.
Image result for describe the 4 chambers of the heart
The right ventricle pumps the oxygen-poor blood to the lungs. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle. The left ventricle pumps the oxygen-rich blood to the body
Some _____ become memory cells when exposed to an infection agent and, if they encounter the same antigen in the future, they can respond quickly to destroy the invader before it causes illness.
Answer: T cells and B cells
Explanation:
Memory cells are the type of immune cells that responds to the previously exposed infectious agent. B and T cells become memory cells.
What are B and T cells?B and T cells are antibody and cell-mediated immune cells respectively that are produced in response to the pathogens and fight the infectious agents that invade the body.
The cells differentiate into the same type and one in the form of the memory cell. The memory cells remember the infectious agent and respond quickly to the same antigen in a future invasion.
Therefore, B and T cells differentiate into memory cells.
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Can someone please help me
Red imported fire ants are an ant species native to South America, but were introduced into the US in the 1950s.
a. True
b. False
This is (b.) False, because it was actually introduced in the 1930's.
Which gland is named for a nearby prominent cartilage?.
Answer:
thyroid cartilage I think
Explanation:
The thyroid cartilage is a hyaline cartilage structure that sits in front of the larynx and above the thyroid gland. The cartilage is composed of two halves, which meet in the middle at a peak called the laryngeal prominence, also called the Adam's apple.
true or false: some wavelengths of light are blocked by our atmosphere
Answer:
False.
Explanation:
Visible light is not blocked by the Earth's atmosphere, although clouds and dust can scatter some of the light back.
Hope this helps!
Answer: True, our atmosphere blocks most ultraviolet light (UV) and all X-rays and gamma-rays from reaching the surface of Earth.
The blood of the covenant is thicker than the water of the womb meaning:.
can i get some help with this question
Answer:
photograph cells in mitosis
Answer:
B. i think im not 100% sure
Explanation:
1. Is the Earth one solid piece of Rock?
Answer:
The Earth is made up of many rocky layers. .
Explanation:
The solid, outer layer is called the crust. Below the crust lies a layer of very hot, almost solid rock called the mantle
Examine the images here for two tree species. What best defines the taxonomy used to group these species?
Question 6 options:
These trees were grouped and named based on similar metabolic processes.
These trees were grouped and named based on shared evolutionary characteristics.
These trees were grouped and named based on overlapping geographic ranges.
These trees were grouped and named based on similar appearance.
The option of best defines the taxonomy used to group these species is that These trees were grouped and named based on shared evolutionary characteristics.
What is the taxonomy of a pine tree?The taxonomy Pinus is that it belongs to the following:
Kingdom : Plant Phylum : Coniferophyta Class : Pinopsida Order : Pinales Family : Pinaceae Genus : Pinus Species : Palustris P. MillThe Common name: Longleaf pine.Learn more about taxonomy from
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3. The air in the stratosphere does a lot of mixing because it is unstable.true or false
Answer: False
Explanation: air in the stratosphere is stable because warmer,less dense air sits over cooler, denser air. As a result there is little mixing of air within the layer.
what makes rna and dna polymerase different? select all that apply.
Answer:
RNA polymerase is the main enzyme in RNA replication and has a lot more jobs than DNA polymerase. In DNA replication, DNA polymerase has helicase, ligase, primase and topoisomerase.
Explanation:
Picture Below. Correct Answer Gets Brainlyest.
The answer to your question is B.
Which phrase describes one characteristic of radioactive elements?
are produced in a laboratory
decay at a constant rate
have a consistent number of particles
release energy and particles to maintain radioactivity
Answer is B) decay at a constant rate
Answer:
B
Explanation:
Are exons and introns expressed or
removed from pre-mRNA?
A. Both exons and introns are expressed.
B. Exons are expressed, and introns are removed.
C. Exons are removed, and introns are expressed.
D. Both exons and introns are removed.
The statement that is true about exons and introns of pre-mRNA is:
Exons are expressed, and introns are removed.What is pre-mRNA?Precursor mRNA or pre-mRNA is the first transcript of a protein-coding gene.
Characteristics of pre-mRNAIntrons are the DNA or RNA sequences that separate the exons, the pre-mRNA regions corresponding to these are eliminated in the nucleus during the maturation process.The exons of a gene are the sequences that will give the messenger RNA that will be translated into amino acids.Therefore, we can conclude that the pre-mRNA maturation process removes introns and joins exons to produce a mature messenger RNA molecule.
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In what ways can the human-animal bond benefit human health?
Answer:
According to the Center for Disease Control (CDC), pet ownership can lower blood pressure and can positively influence our rate of physical activity. Our companions help us cope with stress which can improve cardiovascular health. For older adults, the human-animal bond has been directly linked to healthy aging.
Exposure to toxins can affect a cell's homeostasis and energy production. Cells exposed to toxins will most likely-
Answer:
When toxins damage your enzymes, they prevent the production of hemoglobin in your blood, which can accelerate aging. It also can lead to the failure of energy production and lower your protection against oxidated stress. Failure of these normal body functions increases your risk of diseases like: Cancer.
Explanation:
Toxins modify gene expression. Our genes switch off and on to adapt to changes in our bodies and the outer environment. But many toxins activate or suppress our genes in undesirable ways. Toxins damage cell membranes so they don't respond properly.
Which statement is true?
A. Waves carry objects as they travel through
water.
B. Waves don't carry things as they travel
through water.
Answer:
B. Waves don't carry things as they travel
through water.
Explanation:
The waves will not carry the raft in the direction the waves are moving. The waves will move the raft only up and down.
What is an anticodon?
A. Group of 3 bases on a tRNA molecule
that are complementary to three bases on
mRNA molecule
B. Group of 3 bases on a DNA molecule
that are complementary to three bases on
mRNA molecule
C. Group of 3 bases on a rRNA molecule
that are complementary to three bases on
DNA molecule
D. Group of 3 bases on a mRNA molecule
that are complementary to three bases on
DNA molecule
Answer:
I think it is A.
Explanation: A anticodon is the complimentry base to mRNA.
which statement is true about electrically charged particles?
Answer:
protons are positive neutrons are neutral and electrons are negative
Explanation:
Hope this helps you!!!!!!!!! :D
The image below shows several different organisms that have the ability to fly. All of these organisms have adapted to similar environmental conditions but do not share a recent common ancestor.
A) Adaptive Radiation
B) Homologous Structures
C) Convergent Evolution
D) Divergent Evolution
Answer:
Convergent evolution created all of these flying species.
Which was Charles Darwin’s contribution to the study of biology?
He was the first person to recognize that organisms change over time.
He believed that organisms adapted through the inheritance of acquired traits.
He explained how traits are passed from parents to offspring.
He proposed that natural selection is the primary mechanism of evolution.
Answer:D
Explanation:
Charles Darwin's most significant contribution to the study of biology was his proposal of the theory of natural selection as the primary mechanism of evolution. In his book "On the Origin of Species," published in 1859, Darwin presented a substantial body of evidence showing that species change over time and that natural selection, acting on variations within populations, is the main cause of evolutionary change. Hence option D is correct.
What is Natural selection?Natural selection is a mechanism of evolution that occurs when individuals with certain heritable traits are more likely to survive and reproduce than those without those traits. This results in a gradual change in the characteristics of a population over time.
The process of natural selection occurs because of variation within a population. Individuals that possess traits that are advantageous in their particular environment, such as better camouflage, faster running speed, or stronger immune systems, are more likely to survive and produce offspring that inherit those beneficial traits.
On the other hand, individuals with traits that are less advantageous are less likely to survive and pass on their genes to the next generation.
Although Darwin did propose the idea of inheritance of acquired traits, he later recognized that this mechanism was not significant in evolution. Darwin's work was a significant turning point in the study of biology, and his theory of evolution by natural selection has since become the foundation of modern biology.
Hence option D is correct.
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4. What is catalase?
5. What is catalase turning into oxygen?
6. What are the reactants in this reaction?
7. What are the products in this reaction?
Answer:
4. Catalase is a common enzyme found in nearly all living organisms exposed to oxygen which catalyzes the decomposition of hydrogen peroxide to water and oxygen.
5. hydrogen peroxide
6. the reactant is hydrogen peroxide H2O2
7.the products are water and oxygen, H2O and O2
Explanation:
5. catalase breaks down two hydrogen peroxide molecules to form oxygen.
7. H2O2> H2O + O2 , catalase acts as a catalyst.
what happens to the surface area to volume ratios as a cell gets larger?
Answer:
Smaller as the cell gets larger [Decrease]
Explanation:
The important point is that the surface area to the volume ratio gets smaller as the cell gets larger. Therefore, if the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume.
Assuming that the shape of the cell stays the same, if the cell increases it's linear dimension (length) by a factor of 2, the surface area will be increased by a factor of 4, and the volume will be increased by a factor of 8. You can verify that this is true with simple shapes such as spheres or cuboids.
The volume grows more rapidly than the surface area. Hence the surface area to volume ratio decreases.
Why is dna replication considered a semi-conservative process.
Answer:
This process is said to be 'semiconservative' because one strand from each parent is conserved and remains intact after replication has taken place.
Answer:
Because each DNA strand is made up of one "conserved" old piece of DNA and one new piece.
Explanation:
during DNA replication once the two strands are unzipped on strand is older an theater strand is new
What do organsims and organelles have in common? (other than being living things)
Answer:
they both have dna and other stuff
Explanation:
yea
Water stress occurs when the demand for water exceeds the supply. This is likely to occur in:
Question 19 options:
Rainforest, small towns, industrial areas
Wet ecosystems, Sparsely populated Countries, less intense agriculture
Naturally arid ecosystems, Heavily populated countries, Areas with intensive, highly-irrigated agriculture
Tundras, medium populated countries, cattle-farming
Answer:
C. is the correct answer!
Explanation:
If its a naturally arid ecosystem then there wouldn't be that much water there in the first place.
The more people means the more supplies its needed to support those people, which can also lead to supply shortages such as in water.
Highly irrigated agriculture can also lead to tons of water being wasted, needed, and used up.
What problem is addressed by bioremediation.
Answer:
Bioremediation uses micro-organisms to reduce pollution through the biological degradation of pollutants into non-toxic substances. This can involve either aerobic or anaerobic micro-organisms that often use this breakdown as an energy source.
