Kangaroos are mammals that lack a placenta. Therefore, they must have an alternate way of supplying the developing embryo with
Answer: yolk sac
explanation:
the placenta does not develop for a long time so the alternate way of supplying the developing embryo is through the yolk sac which the embryo can receive nutrients and respiratory gas exchange through which the placenta will be formed later.
Kangaroos are mammals that lack a placenta; therefore, they must have an alternate way of supplying the developing embryo with nutrients, as these should be passed from the mother to the embryo during the time of pregnancy.
What is the function of the placenta in pregnancy?The placenta is an organ that develops during pregnancy to provide nourishment to the growing fetus and to remove waste products from the baby's blood and is attached to the wall of the uterus and connected to the baby by the umbilical cord, it is responsible for producing hormones that maintain the pregnancy, such as progesterone, which helps to keep the lining of the uterus thick, also produces human placental lactogen, which helps stimulate the mother's mammary glands to produce milk.
Hence, kangaroos are mammals that lack a placenta; therefore, they must have an alternate way of supplying the developing embryo with nutrients, as these should be passed from the mother to the embryo during the time of pregnancy.
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The question is incomplete; the complete question is below.
Kangaroos are mammals that lack a placenta. Therefore, they must have an alternate way of supplying the developing embryo with
A. Carbon dioxide
B. Enzymes
C. Nutrients
The picture shows a contractile vacuole of a unicellular freshwater organism. The contractile vacuole regulates the flow of water into and out of the cell in an aquatic environement. What condtions cause the contracile vacuole to fill with water? Your answer: The concentration of water is greater outside the cell than inside the cell. The concentration of water inside the cell is the same as the concentration outside the cell. The temperature of water in the vacuole is higher than the temperature of its environment.
Answer:
The concentration of water is greater outside the cell than inside the cell.
Explanation:
In living cells, water moves by Osmosis across the cell membrane, which acts as the semi-permeable membrane. Osmosis is the movement of water molecules from a region of high water concentration (low solute concentration) to a region of low water concentration (high solute concentration).
The contractile vacuole of this freshwater organism helps regulate water intake and exit by storing excess water. According to osmotic flow, water will flow into the organism via its cell membrane (semi-permeable membrane) because the concentration of water outside the cell is high than inside the cell, hence, this causes an osmotic gradient causing water to flow into the cell. The water that flows into the cell is stored in the Contractile vacuole.
The Hardy-Weinberg equation shows the frequencies of 100 percent of the alleles for a specific gene in a population.
If biologists can show that either p or q is changing over a period of time, what is occurring in the population?
The population is evolving.
The population is decreasing in size.
The population is stabilizing.
The population is not evolving.
Answer: I believe that the answer is that the population is evolving
Explanation: I hope that this helps
In Hardy-Weinberg equation, If biologists can show that either p or q is changing over a period of time, the population is decreasing in size.
What do you mean by Hardy-Weinberg equilibrium?The Hardy–Weinberg principle, also known as the Hardy–Weinberg equilibrium, model, theorem, or law, states that allele and genotype frequencies in a population will remain constant from generation to generation.
The Hardy-Weinberg equilibrium is a principle stating that the genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors.
For populations in the Hardy-Weinberg equilibrium, the equation connects allele frequencies to genotype frequencies. This equation allows us to compare a population's genetic structure in reality over time to the expected genetic structure.
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Which of these would not be considered a genetic trait?
Answer:
A
Explanation:
Does anyone know the answer
Thanks
Answer:
You inherited DNA from each parent
Greenhouse gases absorb radiation from the sun and read it back to the atmosphere which helps to maintain a normal range of what on earth?
Answer:
Heat
Explanation:
Solar energy absorbed at Earth's surface is radiated back into the atmosphere as heat. They spread the heat back to the land and the ocean.
what would be the most likely effect if the side chain of an amino acid group was unstable to vary its structure
second option
Explanation: my brain
Why do elderly persons often develop bowed back and appear to lose height?
Answer:
When we get older, we experience a loss of bone density and our bones begin to thin and become weaker, which results in osteoporosis, causing us to develop bowed backs and appear to lose height.
We lose bone density as we age, and our bones start to thin and weaken. This leads to osteoporosis, which makes us appear smaller and causes us to acquire bowed backs.
What is osteoporosis ?Osteoarthritis is an osseous disease that arises when the body makes either too little bone or loses too much bone. Like a result, bones deteriorate and are more prone to breaking from a trip or, in extreme circumstances, from tiny bumps or sneezes. Under a magnification, healthy bone resembles a honeycomb; the term "osteoporosis" refers to porous bone.
What is treatment of osteoporosis?Typically, bisphosphonates are used initially for treating osteoporosis. Among these is the when first tablet Alendronate (Fosamax). Weekly or monthly pills of was also (Actonel). Ibandronate (Boniva), a tablet taken every month or an IV infusion given every 3 years. The most accurate test for identifying osteoporosis and determining the risk of fracture is commonly believed to be bone density testing by DXA now at hip and spine. Some persons get peripheral DXAs, which assess the thumb and heel bone densities.
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Ocean ocean convergence produces
Answer:
Ocean-ocean convergences produce deep sea trenches.
Explanation:
Explain how a dog meets all of the characteristics of life
Butterflies and moths depend upon _________.
A forests
B blossoms
C seeds
D lakes
Questionnaire 15 of 20 :
Select the best answer for the question.
15. What term refers to the point below the surface where an earthquake begins?
O A. Seismic zone
O B. Hypocenter
O C. Epicenter
O D. Seismogenic zone
Answer:
In my opinion I think its B. Hypocenter
Sorry if wrong
Damage to which of the following structures is most likely to affect the oxygen production of a plant?
A. The electron transport chain
B. Photosystem II
C. The hydrogen ion pump
D. Photosystem 1
Who holds the public property rights? A. individuals B. government C. businesses D. local communities
Answer:
B. Government
Explanation:
What does the pulmonary vein do?
O A. Carries carbon dioxide-rich blood from the heart to the lung
O B. Carries carbon dioxide-rich blood from the lung to the heart
O C. Carries oxygen-rich blood from the heart to the lung
O D. Carries oxygen-rich blood from the lung to the heart
Answer:
B, Carries Carbon dioxide-rich blood from the lungs to the heart
Explanation:
Identify three of the seven common neurotransmitters and the functions of each. Then describe what each neurotransmitters controls or regulates in the body.
Answer:
Dopamine, Acetylcholine, Serotonin
Explanation:
Answer:
One common neurotransmitter is dopamine. It is an excitatory neurotransmitter that is involved in movement, learning, attention, and emotion. GABA is another common neurotransmitter, and it is a major inhibitory neurotransmitter. It is involved in anxiety, arousal, and sleep. Glutamate is a major excitatory neurotransmitter, and it is involved in learning and memory.
Acetylcholine: Serves as a messenger between each motor neuron and skeletal muscles, which accounts for its role in helping to control skeletal muscles.
Serotonin: Affects sleep, hunger, mood, and arousal; connected to aggression and abnormal behavior
Norepinephrine: Helps control arousal and alertness; helps in regulating mood
Endorphins: Major excitatory neurotransmitter; linked to memory and learning processes; released in response to pain and intense exercise
Explanation:
:) have a good day
1
What occurs when the moon casts its shadow on Earth?
lunar eclipse
sidereal month
synodic month
solar eclipse
Answer:
Solar eclipse
Explanation:
When the
When the moon casts its shadow on Earth, a lunar eclipse occurs.
The last option is correct.
How do we explain?A lunar eclipse happens when the Earth's shadow falls on the moon. This can only happen during a full moon, when the sun, Earth, and moon are perfectly aligned.
The Earth's shadow has two parts: the umbra and the penumbra. The umbra is the darkest part of the shadow, and it is where the moon will completely disappear. The penumbra is the lighter part of the shadow, and it is where the moon will only partially disappear.
Therefore, the last option is correct.
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What is an important by-product of the photosynthesis reaction?
During any type of mineral growth, atoms accumulate on
A. ions
B. native elements
C. silicates
D. crystal faces
Answer:
crystal faces
Explanation:
Which kind of bond is formed when electrons are shared between
atoms?
O A. lonic
O B. Covalent
O G Metallic
O 0 Hydrogen
Answer:
A. Ionic
Because an ionic bond is a type of chemical bond made through an electrostatic attraction between two oppositely charged ions.
Hoped I helped -
Sleepy~
Can u please help me .
Answer: lizards
Explanation:
Answer:
birds
Explanation:
because some birds such as owls, hawks, falcons, herons, etc. eat snakes.
What kind of molecule is formed when many disaccharide molecules are combined?
A. Protein
B. Cellulose
C. Lipid
D. Monosaccharide
Answer: B. Cellulose
A combination of many disaccharides will yield a polysaccharaide, such as starch or cellulose
How are nerve cells adapted to carry electrical messages?
Answer:
"The axon, the long, thin part of the neurone along which the impulse passes, is covered in a fatty myelin sheath, which acts as an electrical insulator."
Explanation:
"The dendrites receive incoming nerve impulses from other neurons."
VERY EASY QUESTION. WILL MARK BRAINLIEST When is the peak hurricane season for the Atlantic Ocean Basin, and why do hurricanes peak during this time? August to October, because ocean temperatures are the warmest around the equator at that time August to October, because the atmosphere is the driest around the equator at that time September to December, because the atmosphere is the driest around the equator at that time September to December, because ocean temperatures are the warmest around the equator at that time
Explanation:
When is the peak hurricane season for the Atlantic Ocean Basin?
The official hurricane season for the Atlantic Ocean Basin is from 1 June to 30 November.
Why do hurricanes peak during this time?
Although the Atlantic hurricane season officially began on June 1st, a roughly eight-week period that is often the most active and dangerous time for tropical cyclone activity.
2 Polnts
Humans and gorillas have one different amino acid in their hemoglobin
sequence. What does this say about the evolution of these two species?
A. Gorillas recently evolved from humans.
B. They have no common ancestors.
C. They probably have
recent common ancestor.
O D. They are probably the same species.
SUBMIT
Answer:
they probably have a recent common ancestor
Explanation:
They probably have recent common ancestor. Therefore, option (C) is correct.
What is evolution?Evolution is the process by which species change over time, usually through natural selection. The theory of evolution is supported by a vast body of evidence from many fields, including genetics, paleontology, and comparative anatomy.
Evolution occurs because of changes in the genetic code of organisms, which can be caused by mutations, gene flow, genetic drift, and natural selection. Over time, these changes can accumulate and result in the development of new species from ancestral forms. Evolution is a slow process that occurs over many generations, and it has been responsible for the incredible diversity of life on Earth, from the simplest bacteria to the most complex animals and plants.
The fact that humans and gorillas have one different amino acid in their hemoglobin sequence suggests that they have a recent common ancestor. This is because the hemoglobin protein plays an essential role in carrying oxygen in the blood and is highly conserved across species that share a common ancestor.
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In the triglyceride molecule shown below what are the three molecules
attached to the glycerol molecule?
A Glycolic acids
B. Fatty acids
C. Nucleic acids
Amino acios
Answer:B. Fatty acids
Explanation:
Put the following list in order from beginning to end of a food chain.
1.Sun
2.rabbit
3.worm
4.grass
5.hawk
6.snake
Answer:
1-4-2-6-5-3
Explanation:
Hope it helps
How does the stratification of the earth make plate tectonics possible?
Answer:
Explanation:
Convention currents causes magma to rise and fall therefore it moving the earths plates in different directions
Which of the following types of training would most likely be required for a forest technician?
A. genetic analysis
B.animal physiology
C.plant life cycles
D.Menghting
Answer:
C. plant life cycles
Explanation:
Answer: The correct answer is C.plant life cycles
Explanation: This answer has been confirmed correct.
how do animals survive in both water conditions
Answer:
they have adapted to the temperatur since water trafers water faster than air. (more info below)
Explanation:
animals also have adaptations to temperature control, as water transfers heat faster than air. At the end of the day, aquatic animals have a lot of adaptations for moving in the water, such as a streamlined design, flippers, and a swim bladder, which acts like a fish ballast.
hope this helped!
