Answer:
l don't konw the equation
The opening and closing of the heart valves is caused by Multiple Choice action potentials within the cusps of the valves. pressure changes of alternating contraction and relaxation during the cardiac cycle. contraction and relaxation of papillary muscles that pull on heart strings. contraction of the smooth muscle in the walls of the great vessels leaving the heart.
Answer:
pressure changes of alternating contraction and relaxation during the cardiac cycle.
Explanation:
In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.
Generally, the cardiac cycle occurs in two (2) stages;
I. Diastole : in this stage, the ventricles is relaxed and would be filled with blood.
II. Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.
Hence, the opening and closing of the heart valves is caused by pressure changes of alternating contraction and relaxation during the cardiac cycle.
in which place would you find the fewest organism?
The sahara desert
The peak of Mt everest
A savannah
A rain forest
Answer:
The peak of mt everest
l think this is correct answer
l hope it's helpful for you....
In fruit flies, curved wings (w) are recessive to the dominant straight wings (W), and ebony body (b) is recessive to the dominant gray body (B). A fly that has curved wings and ebony body is crossed with a fly that has straight wings and gray body. Of the offspring there were approximately equal numbers of straight gray, straight ebony, curved gray, curved ebony. What are the genotypes of the parents and offspring
Answer:
The correct answer =
parents : WwBb x wwbb
offspring :
WwBb, Wwbb, wwBb, and wwbb
Explanation:
It is given that the straight wings (W) is dominant over curved wings (w) and the ebony body (b) is recessive to the dominant gray body (B) and there is a cross between curved wings and ebony body and straight wings and gray body is made. The phenotypic ratio is: 1:1:1:1 for the four different phenotypes straight gray, straight ebony, curved gray, curved ebony.
It is not given the genotype of parents, however, for the curved and ebony fly, it is clear that both alleles are recessive as recessive alleles only appear in absence of the dominant allele of the trait.
For another parent, the possible genotypes can be WWBB or WwBb, however in the case of WWBB the phenotypic ratio would not be equal therefore,
crossing WwBb x wwbb
This can be represented in the form of a punnett square as below:
wb wb wb wb
WB WwBb WwBb WwBb WwBb Straight wing, Gray body
Wb Wwbb Wwbb Wwbb Wwbb Straight wing, Ebony body
wB wwBb wwBb wwBb wwBb Curved wing, Gray body
wb wwbb wwbb wwbb wwbb Curved wing, Ebony Body
The phenotypic ratio is: 1:1:1:1 for the four different phenotypes
The splitting apart of cells is known as:
cell division
fusion
energy production
kenosis
Answer:
cell division
Explanation:
Answer:
the answer isA
Explanation:
Mitosis is a process of nuclear division in eukaryotic cells that occurs when a parent cell divides to produce two identical daughter cells. During cell division, mitosis refers specifically to the separation of the duplicated genetic material carried in the nucleus.
Definition of biology?
Answer:
the study of living things
Explanation:
Hope this will help
Answer:
the study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behavior, origin, and distribution.
Explanation:
The word biology is derived from the greek words /bios/ meaning /life/ and /logos/ meaning /study/ and is defined as the science of life and living organisms. An organism is a living entity consisting of one cell e.g. bacteria, or several cells e.g. animals, plants and fungi.
What kind of decomposers are found in all ecosystems
PLZ ANSWER IMMEDIATLY OR I WILL DIE!!! just kidding I won't die
Answer:
bacteria
Explanation:
hope this helps!! please mark brainliest :))
Answer:
Decomposers include bacteria and fungi. These organisms carry out the process of decomposition, which all living organisms undergo after death. Decomposition is an important process because it allows organic material to be recycled in an ecosystem.
Explanation:
why do plants need water?
Explanation:
plants need water for the process of photosynthesis and transpiration
Answer:
to live
Explanation:
wattttteeerrrrrrr
Give three examples of steroid hormones in humans.
Answer:
The steroid hormones are the estrogens (female sex steroids), androgens (male sex steroids), progestins, mineralocorticoids, glucocorticoids, and vitamin D with its daughter metabolites.
Explanation:
mark brainlest!
description of Vegetative
Answer:
Vegetation def is: growing plants, or a life without physical, mental or social activity
Vegetative depends on the context. Mainly just means without brain activity
. In humans, the allele for normal blood clotting, H, is dominant to the allele for hemophilia, h.
This is a sex-linked trait found on the X chromosome. A woman with normal blood clotting has
four children: a normal son, a hemophiliac son, and two normal daughters. The father has
normal blood clotting. What is the genotype for each member of the family? Submit your work
with this assignment.
Answer:
Explanation:
Father: X^HY , mother: X^HX^h
Son: X^HY
hemophilic son: X^hY
2 daughters: X^HX^H
Why does pollution stay within the earths atmosphere
Answer:
pollution doesn't nessairly stay in the atmosphere, it is moved throughout the atmosphere and can be removed by a natural process.
10. What happens when environments change and species cannot adapt?
which of the following is not function of the skeletal system that protects the delicate organs of the body it supports the body see its transports food to the different parts of the body the its enables the body to move please help me please
Explanation:
Option D:production of body heat: The skeleton serves six major functions: support, movement, protection, production of blood cells, storage of minerals and endocrine regulations. Hence, production of body heat is not a function of the skeletal system.
The major functions of the skeletal system are body support, facilitation of movement, protection of internal organs, storage of minerals and fat, and blood cell formation
according to the according to the video what do all organisms whether large or small have in common
All living things must take in materials and energy to grow, develop, and reproduce and they all have DNA and RNA.
HELP ASAP!!!!! Plss sill give u Brainly and heart
Landon wants to model erosion that quickly change the Earths surface. He uses mud to make a model of a hill. What should he do next? please have a necessary answer and please don't guess or I will delete your answer. Please.
(A) Plant seeds on the hill
(B) Sprinkle water on the hill.
(C) Place small rocks on the hill.
(D) Pour a Large glass of water on the hill.
Answer:
b
Explanation:
because it says it says it will change the surface of the hill and that is the second step you need to do when modeling it.
Which area is cold all year and experiences low precipitation?
MCHC OCEAN
ATLANTIC
OCEAN
PACIFIC
OCEAN
PACIFIC
OCEAN
INDIAN
OCEAN
0
1,500
2000 m
1.300.000
Tropical
Tropical wet
Dry
Semiarid
Moderate
Mediterranean
Continental
Humid continental
Polar
Tundra
Non-permanent ice
Subarctic
Ice cap
Hurid subtropical
Arid
Tropical wet and dry
Marine west coast
Highlands
PLEASE ANSWER FAST PLS ILL MARK BRAINLIEST AND 40 POINTS PLS PLS HELP ME
Explanation:
ideo oxean 4000m hurid higlanda
The polar region (arctic and antarctic circles) is cold all year and experiences low precipitation.
What is the polar region?Any location on Earth that lies between the North or South Pole and the Arctic or Antarctic Circles is referred to be a polar region. The Arctic Ocean and a portion of several nearby land masses are included in the northern polar area, sometimes known as the Arctic.
Extremely cold temperatures, heavy glaciation wherever there is enough precipitation to create permanent ice, brief and cold summers, and extreme variations in daylight hours, with 24 hours of daylight in the summer and total darkness in the middle of the winter, are all characteristics of polar regions.
Hence, the polar region (arctic and antarctic circles) is cold all year and experiences low precipitation.
Learn more about polar regions, here:
https://brainly.com/question/2498503
#SPJ7
what is acrosomal reaction???
Explanation:
it allows spermatoza to penetrate the zona pellucida and fuse with the oocyte membrane.
Answer:
The reaction between the acrosome of the sperm as a result of hydrolytic enzymes to enable the sperms to penetrate the egg
Explanation:
It allows the spermatozoa to go through the zona pellucida and fuse with the oocyte membrane for fertilization to take place
One of the hazards of biotechnology is -
creating organisms dangerous to human health.
increasing biodiversity of ecosystems
decreasing the availability of natural fuels.
using excessive amounts of energy.
decreasing the availability of natural fuels
The U.S.A. has built a station on Mars. Two new astronauts are to be sent on a mission to Mars to help maintain the Mars station. As they travel from the Earth to Mars their weight is monitored. What happens to their weight as they travel from Earth to Mars is carefully recorded. Which statement would you not expect to be listed? (Does not happen)
Group of answer choices
As they leave the Earth their weight decreases
As they get closer to Mars their weight increases as they get closer
Weight never changes
They are weightless in space during most of their journey
Answer:
Weight never changes & As they get closer to Mars their weight increases as they get closer.
Explanation:
If the new astronauts were traveling to Mars from Earth the first thing you would notice is that their weights would change, this is because there is little gravity in space so you would watch them become lighter as they go farther into space. As for the second answer, if you were getting closer to mars your weight would be less than the regular weight you would have on Earth this is because of Mars gravity being smaller than the gravity on Earth.
As rocks break apart, the overall surface area will
stay the same
increase
decrease
none of the above
balance the equation: KrF2+H2O -> Kr + O2 + Hf (the numbers are actually subscripts i just cant make them tiny on my keyboard
Answer:
KrF2 + H2O -> Kr + O2 +2HF
Explanation:
You would just need to add a 2 on the HF, because on both sides it can balance with 2F's and 2 H's
3.List the 3 strengths & 3 Weaknesses of behaviorism.
Answer:
Weaknesses: Many critics argue that behaviorism is a one-dimensional approach to understanding human behavior and that behavioral theories do not account for free will and internal influences such as moods, thoughts and feelings.
Strengths: One of the greatest strengths of behavioral psychology is the ability to clearly observe and measure behaviors. Behaviorism is based on observable behaviors, so it is sometimes easier to quantify and collect data when conducting research.
Which of the following statements about the flow of energy in nature is not true?
A. A large amount of energy in food is needed for bodily function
B. A major portion of the energy from food is used to keep our bodies warm
Only a small portion of the energy from food is used to keep our bodies warm or for other bodily functions. Most of it is lost as heat or through other processes.
When answering questions on Brainly, it is important to always be factually accurate, professional, and friendly. It is also important to be concise and avoid providing extraneous details, while also taking care to address all parts of the question.
Typos and irrelevant information should not be ignored. In the case of the provided question, the answer is option B: A major portion of the energy from food is used to keep our bodies warm. This is not true in the context of the flow of energy in nature.
The flow of energy in nature involves a constant transfer of energy from one organism to another in an ecosystem. Energy enters an ecosystem through primary producers like plants, who convert sunlight into food through photosynthesis.
This energy is then transferred to herbivores, who are then eaten by carnivores. As energy flows through the food chain, only a small amount of energy is transferred from one trophic level to the next.
The majority of the energy is lost through respiration, heat loss, and other metabolic processes.
To learn more about : energy
https://brainly.com/question/5650115
#SPJ11
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
a culture started with 5000 bacteria. after 8 hours, it grew to 6000 bacteria. predict how many bacteria will be present after 10 hours
Mosses and other bryophytes are quite short, while many ferns, cone-bearing plants, and flowering plants can grow quite tall. Which type of tissue found in the taller plants, but not in mosses, is most useful for explaining the tall heights that plants can achieve? *
A. endosperm, which nurtures the developing plant embryo in a seed
B. leaf epidermis, which protects inner leaf tissues from drying out.
C. vascular tissues, which conduct water and nutrients against the pull of gravity
D. apical meristems, which allow growth in the tips of roots and shoots
Answer: C. Vascular tissues, which conduct water and nutrients against the pull of gravity.
Explanation:
Because Moss and other bryophytes lack vascular tissue and sharing a number of other primitive traits.
Which of the following statements about migration is true?
a. Migration is always from one region to another.
b. Animals always migrate within a region.
c. Migration always negatively impacts an ecosystem.
d. Animals migrate for various reasons.
Please select the best answer from the choices provided
A
B
Answer:D
Explanation:
Answer:
D. Animals migrate for various reasons.
Explanation:
E2023
Water is split and oxygen is released in
A: photosystem I.
B: the Calvin cyde reactions.
C: the light-dependent reactions.
D: the electron transport chain.
E: the cydic electron pathway.
Answer:
C
Explanation:
This happens during photosythesis II. Where oxygen is released
Hope this helps!
Water is split and oxygen is released in the light-dependent reactions.
Photosynthesis occurs in two stages; Light phase and dark phase. The light phase involves the photolysis of water.
The photolysis of water is a light dependent reaction. In this reaction, water is splint into H and OH.
Hence, Water is split and oxygen is released in the light-dependent reactions.
Learn more: https://brainly.com/question/1388366
why do we need to use artificial feed in pond for fish culture
Answer: Artificial feed is commonly added to aquaculture ponds to enhance growth and survival of juvenile fish. ... Feeding also introduces excessive nitrogen and phosphorus into ponds, which promote growth of nuisance phytoplankton and cause reduced oxygen conditions from aerobic decomposition of feed. Artificial feed is commonly added to aquaculture ponds to enhance growth and survival of juvenile fish. However excessive feeding may decrease fish growth and survival by reducing water quality and natural prey populations.
Explanation:
