In 1847, the German biologist Christian Bergmann noted that mammals and birds living at higher latitudes (farther from the equator) are on average larger and bulkier than related species found at lower latitudes. Suggest an evolutionary hypothesis to explain this observation.
Answer:
not quite sure how to do the hypothesis but its likely to be something to do with the fact that they need more fat and muscle due to the thinner atmosphere as respiration is harder to occur.
Explanation:
A lamprey eel fastens itself to a host fish, such as a lake perch, and feeds on it. When the fish dies, the lamprey finds another host. Which type of symbiosis is this?
Why have scientists developed vaccines?
to research medicines
to diagnose conditions
to treat illnesses
to prevent diseases
Answer:
to treat illnesses (number 3)
Explanation:
:3
Answer:
scientists have developed vaccines to prevent diseasesNeed help with this will make brainliest if right
Research on the different thermal conductivities of different materials. From the different values of the thermal conductivities give seven example of conductors and seven example of insulators
Answer:
conductors are like silver, gold, copper, steel, sea water, and iron. insulators are rubber, glass, oil, diamond, dry wood, and insulation.
Explanation:
What happens to a
pathogen that has been flagged by an antibody?
How is the food you choose to eat used to create energy? referring to cellular respiration
Answer:
Through the process of cellular respiration, the energy in food is converted into energy that can be used by the body's cells. During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP.
During cell division, the chromosomes are held together at the?
A. spindle fibers
B. cell membrane
C. centromere
D. nucleolus
Answer: C
Explanation: The two chromatids of a duplicated chromosome are held together at a region of DNA called the centromere. Centromeres are the attachment points for microtubules, which are responsible for the guiding the movement of chromosomes during mitosis and meiosis.
Which kingdom is completely composed of you unicellular organisms that are prokaryotic
Kudzu, a plant native to eastern Asia was introduced into America in 1876. In 1935, Kudzu was planted along southern roadways to control soil erosion. Adding a foot of vine a day in the spring and summer
kudzu quidity grew out of control. Why can introducing a new species to an existing ecosystem often be a disaster?
A The new species can create excess nutrients in the soil that can damage native species
The series can harminative anime and damage the ecosystem
Answer:
Due to lack of biological gent.
Explanation:
Introducing a new species to a new ecosystem often leads to a disaster because of the absence of bioagent for that species. Bioagent are those organisms which has the ability to control other organisms by feeding on them. A new species does not make problem in its old or original ecosystem due to the presence of controlling agents but in the new ecosystem there is no bioagent that can stop its growth so that's why sometimes the introduction of new species leads to a disaster.
PLASE HURRY!!!!
Cross a parent with genotype Rr and the other parent with genotype Rr...make a
punnett square.
Rrx Rr
What is the genotypic ratio of the offsprings?
-4:0
-2:2
-1:2:1
-1:1:1
Answer:
R r
R RR Rr
r Rr rr
Explanation:
1:2:1 is the genotypic ratio
What are the "energy factories" within a plant cell?
Which of the following best describes the purpose of the chromosomes in the nucleusof a cell?
A. To store the genetic instructions needed to specify traits
B. To release energy by breaking down food molecules
C. To transport nutrients into and out of the cell
D. To protect the cell from microorganisms
Answer:
A. To store the genetic instructions needed to specify traits.
A chromosome is made of a strand of DNA that's encoded with genes.
A rock is an (blank) of minerals.
What is structure 1?
Answer:
Bro give a chart or something not just a question with no info.
Explanation:
GIVING BRAINLIEST ANSWER CORRECTLY FOR 40 POINTS
List 3 people from the history of biotechnology and write one sentence about each persons contribution
Answer:
Karl Ereky
Explanation:
He discovered it
A striped billiard ball rolls and strikes a motionless solid billiard ball. The solid ball then begins to roll.
Which best describes the change in the magnitudes of momentum for the balls?
The change is greatest for the solid ball.
The change is greatest for the striped ball.
The change is the same for each ball.
The change depends on the direction each ball rolls.
Answer:
The change is greatest for the solid ball
Why is it important for nitrogen to be more abundant in our atmosphere than oxygen?
A. Oxygen is only breathable if diluted with nitrogen.
B. Nitrogen and oxygen combine to produce weather that is essential for life.
C. Oxygen must be diluted because it is a highly combustible gas.
D. Nitrogen is a heavy molecule that pulls oxygen, a light molecule, to the surface for oxygen-dependent life to use.
(also report this idiot called americanlove if spot him, for the last 2 hours he has been going to almost every post just to steal points for no reason)
Answer:
Choice C
Oxygen must be diluted because it is a highly combustible gas.
Oxygen must be diluted because it is a highly combustible gas is important for nitrogen to be more abundant in our atmosphere than oxygen.
Why nitrogen is important?Nitrogen is extremely important to living material. Plants, animals and humans could not live without it.
The major source of nitrogen is the atmosphere. It exists as a colorless, odorless, nontoxic gas and makes up about 78 percent of the atmosphere. Nitrogen is also found in the Earth's crust as part of organic matter and humus.
Our atmosphere's nitrogen gas is a molecule made up of two nitrogen atoms. This kind of nitrogen can't be utilized by plants directly. Before it can be utilized by plants, nitrogen needs to be transformed into other forms.
Therefore, Oxygen must be diluted because it is a highly combustible gas is important for nitrogen to be more abundant in our atmosphere than oxygen.
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What needs to happen in order for two populations to be isolated?
Answer:
Isolation means that organisms of the same species are separated, and happens when there is something between the organisms that they can't cross.
Explanation:
Organisms become isolated as a result of environmental change. The cause of isolation can be gradual, like when mountains or deserts form, or continents split apart.
how do the structures of a vacuole and a nucleus differ?
A. a vacuole is enclosed within a membrane ,and a nucleus is not enclosed within a membrane.
B. a vacuole is thick fluid , and nucleus is rigid set layers
C. a vacuole contain no water , and a nucleus a mostly water
D. a vacuole contain mostly water, and a nucleus contain mostly DNA
Answer:
D
Explanation:
Vacuoles are pockets that collect water and the cell's junk. The nucleus sends commands to other cell parts and contains DNA.
Why it isn't A: Both have membranes.
Vacuole- tonoplast. Nucleus- Nuclear membran.
Why it isn't B: The Vacuole is not a thick fluid, though it may hold thick fluid.
Why it isn't C: This should be obvious.
A, b,c,d some pick and help me
Answer:
D
Explanation:
Explain how and why natural selection has allowed species such as sharks and alligators to remain genetically stable for thousands of years.
Answer:
Stabilizing natural selection keeps gene frequencies constant in a population. The normal, most common traits are selected for and preserved so only a limited amount of evolution occurs and species can remain unchanged even over long periods of time.
Explanation:
A biological process called reproduction occurs when an organism creates young (offspring) of the same species.
What influence natural selection for survival of species?Gene frequencies in a population are maintained constant through stabilizing natural selection.
Because only a small amount of evolution takes place and the most typical, most prevalent features are preserved, species can persist unmodified even across very lengthy epochs.
It is among the most crucial traits shared by all living things. While not necessary for an individual's existence, reproduction is necessary for the survival of a whole species.
Therefore, natural selection has allowed species such as sharks and alligators to remain genetically stable for thousands of years.
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Why does the note A-natural sound different on a tuning fork, a violin, and a flute?
plz hurry
.
Answer:
The note A-natural sounds different on a tuning fork, a violin, and a flute because of the relative amplitudes of harmonics
Explanation:
got it right :3
Water is transpired through stomata, but carbon dioxide also must pass through stomata into a leaf for photosynthesis to occur. There is evidence that the level of carbon dioxide in the atmosphere has not always been the same over the history of life on Earth. Explain how the presence of a higher or lower concentration of atmospheric carbon dioxide would impact the evolution of stomata density in plants.
Answer:
Escribir en español, por favor.?
During those high-carbon-dioxide times, plants that produce fewer stomata,
when carbon dioxide levels are low, plants need many stomata in order to scrape enough carbon dioxide to survive.
How does carbon dioxide affect water uptake?Plant water use, an increase in atmospheric CO2 means that stomata, or the pores on leaves that exchange gases between the leaf and the atmosphere, do not need to open.
Thus, carbon dioxide levels are low, need many stomata in order to scrape enough carbon dioxide to survive.
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a plane mirror is useful for seeing
HELP! whoever does these gets brainliest!!
Answer:
blood crime scene arson murder footprint
The typical human adult uses about 160 g of glucose per day, 120 g of which is used by the brain. The available reserve of glucose (~20 g of circulating glucose and ~190 g of glycogen) is adequate for about one day. After the reserve has been depleted during starvation, what other sources can be used to produce glucose
Answer:
Fats and proteins that are present in liver, kidneys, and muscles.
Explanation:
When the reserve of glucose is used by the body during starvation, our body uses fats and proteins that are present in liver, kidneys, muscles etc and convert these fats and proteins into glucose. There is high amount of fats and proteins present in our body which can be used when the glucose reserves depleted from the body during starvation so we can conclude that the fats and proteins are the sources that can be used to produce glucose for the body.
Which organization would not have to abide by OSHA guidelines?
a. nuclear plant
b. religious-based corporation
c. family run business with only local employees
d. all organizations must abide by OSHA guidelines
Correct ans: Nuclear plant :)
Answer:
b. religious-based corporation
Details are underlated or irrelevant details to the topic at hand
YALL PLEASE HELP 90 points ;(
Answer:
it is too small so i can't see it
Answer: Could you make it bigger because I don't have my glasses. Thx and will answer when problem is solved.
Explanation:
The Venn diagram provided compares and contrasts two domains of living things. Both domains include species of
bacteria. Select ALL of the terms which could be applied to only group A in the diagram.
A)
ancient
B)
unicellular
may be pathogenic
D)
live everywhere in the environment
E)
cell wall is made of peptidoglycan
Answer:
C,D,E
Explanation:
i just did it and got them right.Hope this helps :}
This group of Bacteria can be pathogenic, ubiquitous in the environment whose cell walls are composed of peptidoglycan. So, the correct options are C, D and E.
What is Bacteria?
Bacteria are defined as ubiquitous, mostly free-living organisms that contain a single biological cell that constitute a large domain of prokaryotic microorganisms. Bacteria are a few micrometers in length that were among the first life forms to appear on Earth, and are present in most of its habitats.
Some bacteria are harmful that serve a useful purpose that support many forms of life, both plant and animal, and are used in industrial and medicinal processes. This group A mentioned in the above example of Bacteria can be pathogenic, ubiquitous in the environment whose cell walls are composed of peptidoglycan.
So, the correct options are C, D and E.
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