Answer:
Mechanisms enabling one cell to influence the behavior of another almost certainly existed in the world of unicellular organisms long before multicellular organisms appeared on Earth. Evidence comes from studies of present-day unicellular eucaryotes such as yeasts. Although these cells normally lead independent lives, they can communicate and influence one another's behavior in preparation for sexual mating. In the budding yeast Saccharomyces cerevisiae, for example, when a haploid individual is ready to mate, it secretes a peptide mating factor that signals cells of the opposite mating type to stop proliferating and prepare to mate (Figure 15-2). The subsequent fusion of two haploid cells of opposite mating types produces a diploid cell, which can then undergo meiosis and sporulate, generating haploid cells with new assortments of genes.
Explanation:
Brainliest please?
A disruption in the soil cycle results in increased runoff into the ocean.
O True
False
How does the presence of permafrost affect tundra plant life?
A. It prevents all roots from growing, so only lichens can grow.
B. It provides moisture for roots to grow deep, allowing many types of plant life.
c. It only allows shallow root growth, so large plants cannot grow as they normally would.
D. It leaches minerals from the top layer of soil, preventing most plants from growing.
Answer: C
It only allows shallow root growth, so large plants cannot grow as they normally would.
Over the past 800,000 years, what is true about the pattern of climate during glacial-interglacial cycles?
Temperature changes led CO2 changes
Methane played the dominant role in the warming and cooling
Plate tectonics played the dominant role in the warming and cooling
CO2 changes led temperature changes
Answer:
Explanation:
The history of humanity from the initial appearance of genus Homo over 2,000,000 years ago to the advent and expansion of the modern human bieings that we are today evoled from many years ago some say from the begining of time— it is connected to climate variation and change. Human biens has experienced nearly two full glacial-interglacial cycles, but its global geographical expansion, massive population increase, cultural diversification, and worldwide ecological domination began only during the last glacial period and accelerated during the last glacial-interglacial transition. The first bipedal apes appeared in a time of climatic transition and variation, and Homo erectus, an extinct species possibly ancestral to modern humans, originated during the colder Pleistocene Epoch and survived both the transition period and multiple glacial-interglacial cycles. Thus, it can be said that climate variation has been the midwife of humanity and its various cultures and civilizations.
Answer: involve rapid, nonlinear, reactions of ice volume, CO2, and temperature to external astronomical forcing. The precise timing of events may be modulated by millennial‐scale climate change that can lead to a contrasting timing of maximum interglacial intensity in each hemisphere. A variety of temporal trends is observed, such that maxima in the main records are observed either early or late in different interglacials. The end of an interglacial (glacial inception) is a slower process involving a global sequence of changes. Interglacials have been typically 10–30 ka long. The combination of minimal reduction in northern summer insolation over the next few orbital cycles, owing to low eccentricity, and high atmospheric greenhouse gas concentrations implies that the next glacial inception is many tens of millennia in the future.
1 Introduction—Interglacials of the Last 800 ka
Earth's climate of the last 800 ka (1 ka = 1000 years) is the latest stage in a slow cooling that has been in progress for the last ~50 Ma (1 Ma = 1 million years) [Zachos et al., 2008]. During this cooling, ice sheets formed on the Antarctic continent ~40 Ma ago, while the first signs of Northern Hemisphere (NH) glaciation appeared much more recently. Only at the start of the Quaternary Period and the Pleistocene Epoch, ~2.6 Ma ago, did alternations between cold glacial periods with ice on the NH continents, and warmer intervals with little or no NH continental ice, first appear, reflected in the appearance of ice‐rafted debris
Explanation:
How many legs does a water bear have?
Answer:
These paintings are hard to maintain. Ancient mural paintings are exposed to an assortment of distortions brought about by natural impacts, changes in temperature and humidity, as well as contamination and by human ignorance to preserve the monuments without knowing their value.
Which is the best choice for a genetic transformation: a bacterium, earthworm, fish, or mouse?
Answer:
A bacterium would be the best choice in this case
Explanation:
Bacteria are small, single-celled organisms which reproduce quickly and easily; it is made of only one cell, it reproduces every 20 minutes, it does not make people sick, it cannot survive outside the lab, etc.
Among the options given, the best choice for a genetic transformation is implemented for a bacterium. Thus, the correct option for this question is A.
What is Transformation?Transformation may be defined as a process of horizontal gene transfer through which some bacteria take up foreign genetic material (unaided DNA) from the environment. This technique was first reported in Streptococcus pneumoniae by Griffith in 1928.
The population of bacteria utilizes three techniques in order to reproduce and permits genetic variations. They are conjugation, transformation, and transduction. Bacteria are small, single-celled organisms that reproduce quickly and easily in nature.
Transformation is the genetic alteration of a cell resulting from the direct uptake and incorporation of exogenous genetic material from a surrounding atmosphere.
Therefore, the best choice for a genetic transformation is implemented for a bacterium. Thus, the correct option for this question is A.
To learn more about Bacterial transformation, refer to the link:
https://brainly.com/question/11973496
#SPJ2
where is cilia/flagella located?
Answer:
eukaryotic and prokaryotic cells.
Answer:
Cilia have several possible sensory functions, especially when part of nerve cells, and they may not move at all. Cilia are found only in eukaryotes while flagella are found in both eukaryotic and prokaryotic cells.
Explanation:
what is the summer equation for photosynthesis?
Answer:
water sunlight air and vaiabilty
Answer:
water sunlight air and vaiabilty
Explanation:
I will give 20 points!
What has happened to Cinder in Chapter 7 and 8?
Describe the two major types of smooth muscle
Help! What is structure A?
Answer:
structure A is called the Cristae
Which of the following provides the best justification for the contention that Archaea are more closely related to Eukaryota than they are to Bacteria?
O Multicellular organisms are found in both Archaea and Eukaryota but not in Bacteria.
O Cell membranes with ester-linked fatty acids are found in both Archaea and Eukaryota but not in Bacteria.
The composition of cell walls is similar in Archaea and Eukaryota but not in Bacteria.
The single-celled prokaryotic cells of Archaea and Eukaryota are visually similar, but Bacteria is not.
How is DNA recovered from hair?
Answer:
A simple method to extract DNA from hair shafts was developed by using enzymatic laundry powder at the first step of the process. The whole extraction can be finished in less than 2 hours. The simple extraction reagent proposed here contains only two cheap components: ordinary enzymatic laundry powder and PCR buffer
Explanation:
One of the reasons that participants in experiments are not told what the
researcher is testing is because the participants might act differently if they
knew. When this happens it is known as the:
Answer:
Placebo Effect
Explanation:
Answer:
hawthorne effect
Explanation:
which vocabulary goes with which letter
Answer:
its blurry
Explanation:
Answer:
e goes next to e and c does next to b
Explanation:
cause u have too look wiseltyWhich of the following molecules posses both polar and non-polar regions
Answer:
phospholipids
Explanation:
The only molecule that contains both polar and non-polar regions from the ones given are phospholipids.
Science
A cell has many structures inside it. All of these structures are held in the cell by its covering. What is this covering called?
OA. nucleus
ОВ.
mitochondria
OC.
cell membrane
OD. chloroplast
What would this be ???
Answer:
I would say cell membrane
What determines how much energy a human can receive from food?
A. How much oxygen the food contains
B. How much nitrogen the food contains
C. How much energy the food molecules have
D. How much the food molecules weigh
bird is to fly, lion is to ?
Answer:
walks
Explanation:
The answer is walks because, birds fly while lions walk on the legs
Need asap !
When comparing two ecosystems, the one with a larger amount of
biodiversity is likely to have
A. less precipitation
B. more extinctions
C. more stability
D. fewer disturbances
Answer:
B :))
Explanation:
Answer:
more stability
Explanation:
4 A reaction that needs water,
macromolecules are broken down
( biochemistry )
Answer:
Hydrolysis
Explanation:
Hydrolysis is a reaction that needs water to breakdown macromolecules into simpler units.
Macromolecules are giant polymers made up of several repeating monomeric units.
These units are too complex for the body to digest and derive nutritional benefits from them. During hydrolysis, the complex is broken down into monomers. The monomeric units are absorbable and useful for the body.What most likely happens when a plate under the ocean is forced beneath another plate?
Seafloor splits open creating a large trench.
Seafloor spreading moves plates away.
New land is formed from hot molten rocks.
The top plate is uplifted and may create a tsunami.
Answer:
A. Seafloor splits open creating a large trench
Explanation:
I hope this helps
Answer:
it is D/ Location A, because the lighter oceanic plate will be pushed under the continental plate
Explanation:
- The electrons in the outermost ring that are used to determine reactivity are called
Answer:
Valence Electrons
How do scientists obtain knowledge about the
world? Check all that apply.
Answer:
ALL OF THE CHOICES
Explanation:
Answer:
all choices
Explanation:
coz
Which of the following cell organelles helps to transport large extracellular molecules into the cell?
a. Vesicles
b. Lysosome
c. Ribosome
d. Mitochondria
Answer:
A. Vesicles
Explanation:
Fill in box 3.
(This is about DNA Replication)
Answer:
accdcecccehis
Explanation:
How does cellular respiration happen?
Answer:
Explanation:
Hello there! Cellular respiration is the process in which the body breaks down sugar, glucose, within the body. When this glucose is broken down it will be transformed into ATP, Adenosine triphosphate, the energy used within almost all bodily processes. Although the means by which the body breaks down this sugar is rather complex it would be easiest to understand the chemical reactions that make up the process.
one of the many chemical reactions in cellular respiration is as follows:
C6H12O6+6O2⟶6CO2+6H2O+Energy
In the reaction above we see a sugar, C6H12O6, reacting with carbon dioxide. When these two products completely react they will produce water, H2O, carbon dioxide, CO2, and ATP, labeled as energy.
Hope this helps!
-HM
List four major issues affecting today’s environment.
Answer:
Deforestation
Human Overpopulation
overfishing
Ozone depletion
Explanation:
Can someone tell me what the phenotypic ratio is for JjTt x JjTt on a dihybrid cross? I'll mark you brainliest if your right (:
9:3:3:1
Explanation:
thats just the rule for the classic Mendelian ratio for a dihybrid cross
At the complete end of cellular repiration, how many molecules of ATP are produced? A. 15 B. 34 C. 38 D. 26
C.38
Answer:
C.38
Explanation:
During aerobic cellular respiration, one molecule of glucose is broken down in the presence of oxygen to produce approximately 38 molecules of ATP. Light energy is converted into chemical energy in the process of photostnthesis- the resulting carbohydrate moecule incorporates linorganic carbon, and water to produce oxygen and glucose.
ATP or adenosine trohosphate is a high energy molecule, used as a type of energy currency in cells. In respiration, glucose is converted to pyruvate- this molecule's derivatives are then oxidized and reduced to harvest energy as ATP.
C6H12O6 (glucose) + 6 O2 → 6 CO2 + 6 H2O + ≅38 ATP
glucose+ oxygen → carbon dioxide+ water+ energy