Answer:
Explanation:
I wonder how you would explain that both men and women are living much longer. In 1900 the average ago of mortality was 42 years old in the United States. We have nearly doubled that. In the province (Canada) where I live the mortality rate is nearly 81 years old. That is a huge improvement.
We have done in spite of contaminated air, oceans that resemble sewage sump (there is a plastic dump the size of Texas somewhere in the Pacific and the Atlantic is little better), a population increase that is unbelievable in terms of %. I wish my stocks would show that kind of % increase, and the current biological crisis -- I'm not allowed to name it. (There have been several of these pandemics since 1900.)
So I'll ask again: How are such things to be explained.
what types of interactions regulate gene expressions
Answer: Eukaryotic gene expression is regulated during transcription and RNA processing, which take place in the nucleus, and during protein translation, which takes place in the cytoplasm. Further regulation may occur through post-translational modifications of proteins.
I hope it helps u um.. can I pls have brainliest
Explanation:
Answer: Eukaryotic gene expression is regulated during transcription and RNA processing, which take place in the nucleus, and during protein translation, which takes place in the cytoplasm. Further regulation may occur through post-translational modifications of proteins.
Explanation:
Which cellular change in an organism could be inherited by the next generation?
1.
a change in the ribosomes in the pancreas of a squirrel
2.
the deletion of a single DNA base in a sperm cell of a trout
3.
a decrease in the size of a vacuole in a rose leaf cell
4.
the transfer of a piece of a chromosome in the skin cell of a raccoon
Answer:
4.
Explanation:
Chromosomes are passed on to children. Each parent gives 23 chromosomes to create a full set of 46.
a) Exploin neurulation
Answer:
Explanation:
Neurulation is a process in which the neural plate bends up and later fuses to form the hollow tube .which eventually differentiate into the brain and the spinal cord of the central nervous system.
Mystery Protist A
. Direct sequence data show significant sequence homology to Cyclotella, whose shells are often harvested to be used in industrial filtering.
. Morphological analysis: It is covered by a glassy shell and contains photosynthetic pigments. Reproductive cells have two flagella.
. Field observations: It was isolated from a marine water sample and has been observed gliding via microtubules that extend from its shell.
What is the protists?
Mystery Protist B
. Direct sequence data show significant homology with Giardia intestinalis, the parasite that can cause severe intestinal distress in humans.
· Morphological analysis: It is flagellated and has two nuclei and no cell wall.
· Field observations: It has been observed to reproduce asexually. It was isolated from the feces of cats.
What is the protist?
Mystery Protist C
· Direct sequence data show significant homology with dinoflagellates and apicomplexans.
· Morphological analysis: It has a swimming cell covered with cilia. It has two nuclei—a smaller one and a larger one.
· Field observations: It was isolated from a sample of goat feces and has been observed
reproducing sexually via conjugation, trading its smaller nuclei.
What is the protist?
Mystery Protist D
· Direct sequence data show high homology with Dictyostelium discoideum.
· Morphological analysis: It forms a gigantic, web-shaped cell with many nuclei, and it moves with amoeboid motion.
· Field observations: It was isolated from a forest soil sample.
What is the protist?
Mystery protist E
· Direct sequence data show significant homology to Porphyra, which is harvested for sushi in eastern Asia.
· Morphological analysis: It is red, has photosynthetic pigments, and has no flagella.
. Field observations: It was isolated from an ocean-water sample near a coral reef.
What is the protist?
Mystery Protist F
· Direct sequence data show significant homology to Pyrgo anomala, which contributes to chalk- and limestone-forming sediments.
· Morphological analysis: It has multiple nuclei. It has no cell wall but does have a shell made of calcium carbonate through which pseudopodia extend.
· Field observations: It was isolated from a marine-water sample, in which numerous individuals were found drifting passively in the water, feeding by extending pseudopodia out through openings in their shells. Numerous shells were collected from the ocean floor as well.
What is the protist?
Mystery Protist G
· Direct sequence data show significant homology with diplomonads and parabasalids.
· Morphological analysis: It does not have a cell wall but does have a network of protein molecules just under the plasma membrane that stiffen the cell. It is photosynthetic but produces an unusual carbohydrate unlike starch.
· Field observations: It was isolated from a freshwater sample. It is easy to observe under a light microscope because it actively swims toward light.
What is the protist?
Answer:
The correct answer would be -
A. diatoms
B. Toxoplasma gondii
C. Giardia lamblia
D. Pelomyxa
E. Rhodophyta - Corralinna
F. foraminiferan
G. euglena
Explanation:
1. Protist A
The given characteristics of this protist are similar to the diatoms as diatoms are the protists that are covered with silica-made glassy shells with photosynthetic pigment and the sperm is known to have flagella. found in marine water normally.
2. protists B
Toxoplasma gondii is a parasitic protist that is found in cat feces and homology with Giardia intestinalis and causes GI tract irritation or distress in humans. This parasitic protist have flagella and two nuclei in the cell.
3. protist C
Giardia lamblia is known to have two nuclei and perform conjugation and shows homology with dinoflagellates and apicomplexans. it is known to be present in the feces of the goat covered with cilia.
4. Protist D
Pelomyxa is found in moist soil and has an amoeba-like movement with web-like morphology. it is mold similar to Dictyostelium.
5. Protist E
Corralinna is a Rhodophyta it shows association with the coral reef, has no flagella and contains photosynthetic pigments. It is used in sushi making and is harvested largely for this purpose.
6. Protist F
Foraminiferan shows homology to Pyrgo anomala, which contributes to chalk- and limestone-forming sediments as it has a shell of calcium carbonate found in marine water with small pores on the shell from which the pseudopodia comes out.
7. Protist G
euglena found in freshwater and tends to swim towards the light. Euglena has no cell wall but the membrane has pellicle in it.
A cell approaches a large macromolecule. To consume it for food, the cell extends two pseudopods that surround and pull the macromolecule in as shown above. Which of the following terms describes this type of transport?
A. pinocytosis
B. endocytosis
C. exocytosis
D. phagocytosis
E. receptor-mediated endocytosis
Answer:
B. phagocytosis
Explanation:
Taking the Study Island lesson as I type this.
7 difference between Arteries, vain and capillaries
Answer: Hope this helps answer in explanation.
Explanation:
1) These are responsible for the transportation of blood from the heart to all parts of the body. These vessels collect blood through capillaries and transport it towards the heart. These vessels connect arteries and veins.
2. All arteries carry oxygenated blood except pulmonary arteries which carry deoxygenated blood. All veins carry deoxygenated blood except pulmonary veins which carry oxygenated blood. These carry mixed oxygenated and deoxygenated blood.
3. Arteries have no valves in them except at the base of the pulmonary trunk and aorta. Valves are present in veins. These valves prevent the backflow of blood. There are no valves in them.
4. Arteries have high blood pressure. Veins have low blood pressure. There is falling pressure in them.
5. In arteries, waves of blood pressure or pulse due to heartbeat can be detected. There is no pulse. There is no pulse.
6. Blood flows rapidly between 400-500mm per second in the aorta and decreasing in arteries and arterioles. The rate of blood flow increases from smaller to larger veins. Blood flow is slowest which is less than 1mm per second.
7. Arteries have a smaller bore and thick walls. Veins have a larger bore and thin walls. Capillaries have a larger bore and the wall is of one cell in thickness.
8. There are thick muscle layers and elastic fibers present. The elasticity helps to change the pulsating flow of blood. There are thin muscle layer and less elastic fibers present in veins. So, they are less elastic. No muscles or elastic fibers are present.
9. There is no exchange of materials. There is no exchange of materials. These are responsible for the exchange of gases and nutrients.
wich of the following ingredients produce a heterogeneous mixture when mixed together ?
a.oil and water
b.sugar and water
c.salt and vinegar
d.molten copper and zinc
Answer:
the answer is A
oil and water
As water temperature __________ the amount of O2 dissolved in water _____.
Answer:
Explanation:
As water temperature increases, the amount of O2 dissolved in water decreases.
The graph looks something like this (though not exactly. It just has the same sort of shape.)
What are the Negative impacts of genetically modified crops
answer:
the use of some gm crops can have negative impacts on non-target organisms and on soil and water ecosystems.
explanation:
for example, the expansion of gm herbicide-tolerant corn and soy, which are twinned with herbicides, has destroyed much of the habitat of the monarch butterfly in na.
good luck :)
i hope this helps
have a great day !!
CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION I WILL MARK YOU BRAINLIEST THANK YOU !!!
Answer:
A. Coal
Explanation:
Coal has the potential to generate energy
Which of the following is an example of a learned behavior? *
crying baby
swimming fish
walking
breathing
Answer:
Walking
Explanation:
help plz..............
Answer:
Should be 50% tell me if Im right
Protozoa are a type of unicellular organisms.
True
False
Answer:
True
Protozoa are eukaryotic unicellular organisms.
It's true lol and why do you take forever to get clothes?
help bonus points
real ans plzz
Answer:
B. A Temperature Of 37°
Explanation:
Hope It Helps U.
As rocks break apart, the overall surface area will
stay the same
increase
decrease
none of the above
10. An animal has two eyes, six legs and no wings. Which group does the
animal belong to?
(1) bird
(3) insect
(2) fish
(4) mammal
Answer:
I think it's insect......
Mercury is often used in thermometers. The mercury sits in a bulb on the bottom of the thermometer and rises up a thin capillary tube as the temperature rises. Suppose a mercury thermometer contains 3.380g of mercury and has a capillary that is 0.200mm in diameter. How far does the mercury rise in the capillary when the temperature changes from 0.0 0C to 25.0 0C
Answer:
3.5 cm
Explanation:
Mass of mercury = 3.380
Diameter = 0.200
At t = 0 and 25 degrees we have 13.596 and 13.543 as density
At 0 degree = v = 3.380/13.596 = 0.2485
At 25 degrees = 3.380/13.534 = 0.2497
We use volume of cylinder to get height
At 0⁰ height = 7.91
At 25⁰ = 7.944
The difference in height = 0.035
Multiply by 100 = 0.35 x100
= 3.5cm
how do water and living things interact?
Explain the relationship between DNA, genes, chromosomes, and traits.
Answer:
Genes are contained in chromosomes, which are in the cell nucleus. A chromosome contains hundreds to thousands of genes. Every normal human cell contains 23 pairs of chromosomes, for a total of 46 chromosomes. A trait is any gene-determined characteristic and is often determined by more than one gene
What would happen to the living things in the pond if you increase the concentration of salt?
Answer:
they would perish
Explanation:
why can we go for a long time without eating but not breathing
is a point in a cladogram where a single ancestral lineage breaks into two or more descendant lineages
Answer:
Node, Claude
Explanation:
Nodes are points of attachment for leaves, aerial roots, and flowers. The stem region between two nodes is called an internode.
A clade is a grouping that includes a common ancestor and all the descendants (living and extinct) of that ancestor.
Answer:
Noda
Clade
Taxa
Explanation:
edge 2021
you are asked to prapare a drink that is a heterogeneous mixture.what would you prapare?
a.instant coffee and hot water
b.warm milk
c.soft drinks
d.orange juice with pulp
Which group is allowed to unionize but NOT strike? *
farmers
federal employees
factory workers
professional athletes
Answer: The answer is federal employees
Explanation:
Why do you think that the shape of the different types of fatty acid molecules affects how easily they solidify?
Answer:
Fats are actually a type of lipid. Lipids are a major class of biochemical compounds that includes oils as well as fats. Organisms use lipids to store energy and for many other uses.
Lipid molecules consist mainly of repeating units called fatty acids. There are two types of fatty acids: saturated fatty acids and unsaturated fatty acids. Both types consist mainly of simple chains of carbon atoms bonded to one another and to hydrogen atoms. The two types of fatty acids differ in how many hydrogen atoms they contain.
Explanation:
Can I plz have brainliest
The shape of the types of fatty acid molecules has an impact on their solidification.
It should be noted that in the unsaturated fatty acid, there is at least a double bond in its string. The carbon atoms that are joined by the bonds lead to the change in their shapes.
While saturated fatty acids have a linear structure, the unsaturated fatty acids kink or bend in order to form double bonds within the chemical foundation.
Read related link on:
https://brainly.com/question/11244537
if all land on Earth was still connected how would this affect biodiversity
Answer:
there would be little to no biodiversity because all the climates would be quite similar making everything in them similar as well.
Explanation:
i pretty much based my answer off of what we know pangea to have been like.
good luck :)
hopefully, this helps
have a great day !!
Is there always enough rainfall in the island for gardening?
a culture started with 5000 bacteria. after 8 hours, it grew to 6000 bacteria. predict how many bacteria will be present after 10 hours
Which amino acid chain will be formed by the codons shown below? GGA AAG UGU
A. Gly Lys Val
B. Glu Lys Val
C. Glu Lys Cys
D. Gly Lys Cys
Answer:
B
Explanation:
the pairing of codons......
i got option A on the test
Explanation:
As mercury moves up the trophic levels in food chains, its concentration
Stays the same
Increases
Decreases
Is eliminated
Answer:
Increases
Explanation:
The concentration of mercury will increases as it moves up the food chain because of biomagnification. For example, a school of small fish consumes a minute amount of mercury each, but then a larger fish eats five of the smaller fish. After this the larger fish has more mercury in its system than one small fish because it ate five small fish (along with the mercury in each of the small fish). Now a seal eats multiple large fish. Overall, the seal has the highest mercury concentration out of all the animals mentioned.
Biomagnification is "the concentration of toxins in an organism as a result of its ingesting other plants or animals in which the toxins are more widely disbursed."