Answer:
When one is nervous activates the sympathetic system and the irrigation towards the cardiac and muscular zone is increased, increases the arterial tension and the respiratory rate.
That is why the blood or blood volume is dispersed in these organs to be able to render efficiently in a moment of stress or flight for the human.
When we have sexual intercourse and there is sexual excitement, a large part of the blood volume goes to the reproductive organs to be able to irrigate the area and produce said excitement, if we are stressed in an alert situation, it will be harmed by the priority body to irrigate the main areas like heart and muscle.
Explanation:
It is important to clarify that the physiological stress in humans is a normal situation, thanks to the presence of cortisol and it is what keeps us active, but if it increases due to anxiety or overwork, psychological problems, etc., it will no longer be physiological due to that is in excess.
Thus, sexual arousal will also be affected by the psychological impotence generated by excess mental stress outside the vascular pattern.
Ground squirrels are found in many areas of the United States. They live in underground burrows and are often attacked by birds of prey, coyotes, and bobcats. Which of the following is a limiting factor for a ground squirrel population? a population of tree squirrels a population of hawks genetic variability breeding season
Answer:
a population of hawks
Explanation:
hawks are predators and feed on small ground/tree animals, such as squirrels, rabbits. rats,
The number of ground squirrels may be constrained by the presence of predators including bobcats, coyotes, and birds of prey.
What will be the impact of predators in the population?These predators pressure may lead to fewer individuals in the population, which may alter the distribution of those individuals within the environment. Food and water availability are examples of resources that may be limited.
For instance, the number of ground squirrels will be constrained if it increases too much and there is not enough food to feed it. The number of ground squirrels may also be impacted by environmental factors such as temperature, precipitation, and habitat accessibility.
Limiting factors are those that prevent a population from expanding. Predators like birds of prey, coyotes, and bobcats are limiting variables in the case of ground squirrels since they can reduce the squirrel population. Competition for resources like food, water, and shelter may be another limiting issue.
Therefore, the number of ground squirrels may be constrained by the presence of predators.
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A biologist is studying how green sea turtles choose where to lay their eggs. She makes a hypothesis that because this species is related to other sea turtles through common ancestry, they probably all use the same process. This biologist formed her hypothesis using:________
a. A hunch
b. The unifying theory of evolution
c. Experimentation
d. The scientific method
e. Observations of green sea turtles' behavior
Answer:
Option b
Explanation:
Hypotheses are carried out as proposed explanation made on the basis of limited evidence which serves as a beginning point for further study.
The biologist in this case has a limited evidence with regards to this species which is just only about its ancestry, so her hypothesis was based on the unifying theory of evolution which is the framework within which biologists ask questions about the living world providing predictions with regards to directions about living things.
The correct answer, unequivocally, is (B).
- This is because she used her knowledge that, from an standpoint of evolution, these turtles were related to each other.
Which cell lacks a nucleus?
Muscle cell
Euglena
Fungal cell
Bacterial cell
Answer:
Bacterial Cell
Explanation:
Prokaryotic organisms such as bacteria lack a well-defined nucleus as present in normal eukaryotic organism. Rest of the options do have nucleus.
Mendel first crossed true-breeding plants to produce a second generation, which were then allowed to self-pollinate to generate the offspring. How do we name these three generations?
Answer:
P, F1 and F2
Explanation:
The first generation crossed which included the true breeding parents are the P generation plant. This produces the two subsequent generations which are the first filial generation (F1) and the second filial generation (F2).
52. Which one of the following pairs of vegetable and disease is correctly matched?
CA Cabbage=Carly blight
B. Cucumber Cub root
C. Potato =Black wart
CD. Tomato White rust
Answer:
D. Tomato White rust.
Explanation:
Hope it helps.
Convert 9.75 millimeters to centimeters. centimeters
Answer:
here,
10mm = 1cm
or, 1 mm=1/10 cm
or, 9.75mm=1/10×9.75cm
=0.975 ..........is the answer
hope it helps..
Answer:
.975
Explanation:
my brain:)
Electrons spin in shells around the nucleus. The closest shell (n = 1) can contain a maximum of____
electrons?
4
2
8
6
Answer: 2 electrons
Explanation:
The inner shell (1st shell) can hold 2 electrons, the next shell can hold 8 electrons and the third shell can hold 18 electrons.
Answer:
2 electrons
Explanation:
Electrons have various shells. The first one is called the K shell and it holds a maximum of two electrons.The next is the L shell (8 electrons), then the M shell and so on.
What can we say about
protons?
A. They are in the nucleus and never
leave.
B. They move around outside the nucleus.
C. They move in and out of the nucleus.
The NADH and FADH2 molecules that are used during the reactions of the electron transport chain are derived from glycolysis, the preparatory reactions, and the citric acid cycle.
a) true
b) false
Answer:
The correct answer is option a) "true".
Explanation:
The electron transport chain that takes place in mitochondria during cellular respiration is interconnected with several other biological pathways in the cell. These pathways include glycolysis, the preparatory reactions, and the citric acid cycle, where NADH and FADH2 molecules are synthesized. In glycolysis and citric acid cycle, 2 NADH and 3 NADH molecules are synthesized, respectively. Regarding FADH2, one molecule of this compound is synthesized per each cycle of the citric acid cycle.
state and explain five uses of insects
Answer:
They aerate the soil-
They pollinate blossoms
Some are are scavengers, and feed on dead animals and fallen trees, thereby recycling nutrients back into the soil.
They produce silk (worms)
they clean up waste
Determine if the statement is true or false, and why. “The key to cell differentiation is that only some of the genes in a cell are expressed at any one time.” A. False, it should read “The key to Protein Synthesis is that only some of the genes in a cell are expressed at any one time.” B. False, it should read “The key to cell differentiation is that only one of the genes in a cell is ever expressed at any one time.” C. True D. False, it should read “The key to cell differentiation is that all of the genes in a cell are expressed at the same time.”
Answer:
C
Explanation:
The statement that “The key to cell differentiation is that only some of the genes in a cell are expressed at any one time.” is TRUE
WHAT IS CELL DIFFERENTIATION?
Cell differentiation is the process by which an immature cell develops into a specialized cell. Cell differentiation is a characteristics of multicellular organisms in which specific cells need to perform specific functions. For example, in a multicellular organism like humans, we have brain cells, liver cells, kidney cells etc. that take on specific task. HOW DOES CELL DIFFERENTIATION TAKE PLACE:All cells in the body emanate from stem cells capable of differentiating into any cell type. These stem cells are said to be TOTIPOTENT. Totipotent cells give rise to specialized cells by the principle of gene expression. Some genes in the cell are expressed at a time while others are turned off. Hence, the genes of the cell that was turned on functions specifically for what they encode.Therefore, the statement that “The key to cell differentiation is that only some of the genes in a cell are expressed at any one time.” is TRUE.
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Which statement summarizes the main purpose of photosynthesis?
OOO
It converts gases to solids in the form of sugar.
It converts carbon to oxygen.
It converts light energy to chemical energy.
It converts energy to mass.
Explanation:
it converts light enegry to chemical enegry. as it converts sun light enegry into food substances.
What is enzyme specificity?
Answer:
This is the tendency of enzymes to catalyse a specific set of chemical reactions.
Explanation:
This is enzyme specificity.
Non-metals are used to make insulator-Why?
Answer:
non-metallic solids are said to be good insulators, having extremely high resistance to the flow of charge through them.Most atoms hold on to their electrons tightly and are insulators.Electricity can only be conducted by the motion of electrons or ions. Non-metals do not conduct electricity because unlike metals, they have no free electrons
Explanation:
i hope this will help you :)
Estimate how many arteries branch off the aorta given that arteries have a diameter of 0.4 cm and a flow speed of 45 cm/s.
Answer:
Approximately 25 arteries would branch off
Explanation:
Aorta has a diameter of 2 cm, so area is pi x 1^2 = 3.142
In case of the artery, pi x 0.2^2 = 0.126
So dividing total area of aorta by total area of one artery, we get 3.142/0.126 = 25.021
Hence, about 25 arteries will be needed to carry the amount of blood that flows in the aorta vessel.
what is an allele
A. one chromosome in a pair
B. a homo zygou gen type
C. something that is always dominant
D. a form of a gene
an allele is a form ofa gene
The psychologist most closely associated with the school of functionalism is
Answer:
Explanation:
Edward B. Titchener. Functionalists, including psychologists William James and James Rowland Angell, and philosophers George H, they stressed the importance of empirical, rational thought over an experimental, trial-and-error philosophy.
hope it helps
The Punnett square on p. 70 of your lab manual shows the genotypes of two parents for trait R. Use this Punnett square to answer the questions in this exercise. Trait R is the Mendelian trait in humans for tongue rolling. The allele for the ability to roll the tongue (R) is dominant over the allele for the inability to roll the tongue (r). Mom R r R RR Rr Dad r Rr rr1. What is the mother's genotype? 2. What is the mother's phenotype? 3. What is the father's genotype?4. What is father's phenotype? 5. What is the probability of their daughter Maria having each of the possible genotypes and phenotypes? 6. Are you 100% sure of the parents' phenotypes? Are you 100% sure of Maria's phenotype? If not which are problematic? Why? 7. Are you 100% sure of the parents' genotypes? Are you 100% sure of Maria's genotype?
Answer and Explanation:
You will find the answers and further explanations posted as an attachment due to technical difficulties.
Which type of stress causes rocks to fold?
compression
shearing
strike-slip
tension
Answer:
A Compression
Explanation:
Since the rock cannot move, it cannot deform. This is called confining stress. Compression squeezes rocks together, causing rocks to fold or fracture (break) (figure 1). Compression is the most common stress at convergent plate boundaries.
The result of mitosis is that the daughter cells end up with the same number of chromosomes that the parent cell had. Another way to maintain the number of chromosomes would be to carry out cell division first and then duplicate the chromosomes in each daughter cell. Do you think this would be an equally good way of organizing the cell cycle? Why do you suppose that evolution has not led to this alternative?
Answer:
No, it will not be good way of organizing the cell cycle, as cell division would occur first and duplicate the chromosomes later, it would lead to unequal distribution of chromosomes in the offspring.
E.g. let the parent cell has chromosomes A, B, C, D so when the cell will divide the chromosomes will be divided in two sets as: (A, B) and (C, D), the daughter cells will have one of these sets each. Later it will be duplicated then the result will be (A, A, B, B) and (C, C, D, D). But ideally it should be A, B, C, D, as this had not happened in the above case so the offspring or daughter cells would have half of the genetic code missing hence they could not survive in nature. That's why natural evolution had not led to this alternative.
Which statement summarizes a change that occurs during photosynthesis?
Answer:
It converts light energy to chemical energy.
Explanation:
Its absorbing sunlight and changing in to chemical energy for the plants nutrients.
During photosynthesis, light energy will be changed into chemical energy.
What is photosynthesis?Photosynthesis was a process used mostly by plants as well as other creatures to transform sunlight into chemical energy which, via cellular respiration, might subsequently be produced to fuel the organism's functions.
What is chemical energy?Chemical energy was the energy that would be generated while chemical substances engage in a chemical reaction but also change into some other substances.
Therefore, during photosynthesis, light energy will be changed into chemical energy.
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The walls of bronchioles lack
a. elastic tissue
b. columnar epithelium
c. smooth muscle
d. hyaline cartilage
e. ciliated cells
Which statement about cellular respiration is true
A. It produces oxygen
B. It requires water
C. It is used by every living cell
D. It converts energy to food
answer
answer is( c.) it is used y every living cell
Match each of the following terms associated with the control of heart rate and blood vessel diameter with its defining term (e.g., integrating center, receptors, and so on).a. Parasympathetic neurons b. Carotid and aortic baroreceptors c. SA node d. Veins e. Sympathetic neurons f. Arterioles g. Ventricles h. Change in blood pressure i. Medullary cardiovascular centers1. Integrating center 2. Efferent neurons 3. Receptors 4. Stimulus 5. Target
Answer:
a. Parasympathetic neurons. Efferent neurons
b. Carotid and aortic baroreceptors. Receptors
c. SA node. Target
d. Veins. Target
e. Sympathetic neurons. Efferent neurons
f. Arterioles. Target
g. Ventricles. Target
h. Change in blood pressure - Stimulus
i. Medullary cardiovascular centres. Integrating center
Explanation:
The efferent parasympathetic pathway is considered to be part of the autonomic nervous system. The efferent parasympathetic control is produced by nerve signals that are transported from the central nervous system to their corresponding targets.
Targets are those tissues where nerve impulses are directed. These targets include the vascular system (i.e., arterioles, ventricles, veins, etc).
Receptors are specialized cells capable of detecting a stimulus and promote a response (i.e., an electrical impulse).
The integrating center of the nervous system is represented by the central nervous system (CNS). The CNS is composed by the brain and the spinal cord, it senses the stimulus and produces the corresponding nerve impulse (i.e., response).
Which statement best describes monsoons?
They force cool, moist air from oceans to rise.
They are winds that blow in the opposite direction of a normal wind.
They bring heavy rain in the winter and in the summer.
They influence precipitation as wind moves near a mountain.
Answer:
The correct answer to the following question will be Option B and C.
Explanation:
Monsoon seems to be a change throughout the course including its predominant hot air flowing from either the south-western oceans of India towards India.The summer monsoon gives a luxurious atmosphere as well as heavy rains to something like the coastline of Asia (south-east), where many monsoon showers of rain undergo their rainy season throughout the winter.The other choices are not related to the given circumstances. So that Option B & C would be the appropriate choice.
Answer:
Pretty sure its B not sure tho. If its correct, mark as brainliest
Explanation:
All the animals trees and plants are made up of cells that share many similar nucleus
Answer:
True.
Explanation:
Animal cells and plant cells are similar, though plant cells have chloroplasts and cell walls while animal cells don't. However, both have mitochondria, a nucleus, Golgi Apparatus, etc.
Ernst Haeckel (1834–1919), a German biologist and naturalist, disagreed with von Baer and further expanded on the Meckel–Serres law with his biogenetic law. What does the biogenic law claim?
Answer:
Simply it states that the progress of development of an organism is a recapitulation of the organism's evolutionary history, and thus its progeny.
Explanation:
Hence based on this the stages of developments of an embryo are similar to developments stages seen in adult forms.Therefore it is can be stated as recapitulation of phylogeny by ontogeny . Thus the developmental stages observed in an embryo, are summary oft he adult forms of its progeny.Therefore, studying this developmental stages in an embryo is in effects studying the diversification of life on earth, and its history.
In summary the developmental stages of the embryo is a good method to detect the similarities between taxa, and findings from these can provide evidences that their is a common ancestry for all species of organism on earth.
A science student makes the following statement: I think that plants grow faster in acidic soil than they do in normal soil. Which of these is the student doing?
The given question is incomplete. The complete question is as follows:
A science student makes the following statement:
I think plants grow faster in acidic soil than they do in normal soil.
Which part of the scientific process is this?
A. Analyzing data
B. Testing a hypothesis
C. Forming a hypothesis
D. Stating a theory
Answer:
C. Forming a hypothesis
Explanation:
The given statement is a "hypothesis" formed by a science student.
A hypothesis form a relationship between independent variable and dependent variable. Independent variable is the variable that a researcher or scientist controls while dependent variable is the variable that a scientist observes and measures.
So, in the given statement, independent variable is the concentration of acidic and normal soil and dependent variable is the growth of the plant, that the student will observe.
Hence, Student is making a hypothesis and the correct option is "C".
You are going to enter a biology science fair. You and your friends have come up with some interesting ideas. Look at the questions below and choose all of the questions that are testable and would lead to a good science fair project. Is the Abominable Snowman afraid of rats? Does feeding peanuts to chickens make their eggs larger? Do the chirps of a cricket indicate air temperature? Why are small dogs more cuddly than large dogs?
Answer:
The questions 'Does feeding peanuts to chickens make their eggs larger?' and 'Do the chirps of crickets indicate air temperature?' would lead to a good science fair project.
Answer:
Answer 2, 3 are correct
Explanation:
What is the defining characteristic of eusocial population a. If complex communication allows for the efficient transmission of information b. If the distance between social groups is greater than the mean subpopulation census c. if the effective population size is much less than the haploid deficiency value d. if there is complete division of roles within the society particularly with regards to reproduction
Answer:
d. if there is complete division of roles within the society particularly with regards to reproduction.
Explanation:
Eusocial insects are those insects that live in a colony with only some individuals capable of reproducing. usually there is division of labour with different individuals undertaking different roles such as defence or foraging. Examples of eusocial insects are bees, ants and wasps.
Hope it helps.
Statement that explains defining characteristic of eusocial population is D: if there is complete division of roles within the society particularly with regards to reproduction.
Eusocial population usually have extreme task specialization, and this usually help colonies to achieve gathering of resources.At times, due to constraints on independent breeding, they sometimes forgo reproduction.Therefore, option D is correct.
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