Answer:
The correct answer is B) Loss of hind limbs followed by underwater ears and tail flukes.
Explanation:
Scientists estimate that the evolution of the Whale in the form which it now takes started approximately 50 Million years ago.
The most likely land animal to have taken the step to move back into the ocean is said to be the Bear. Even today, bears are known to be excellent swimmers and can swim and hunt in water and underneath it.
Other animals that have been suspected to have made this move, hence being the animal that evolved is the Hippopotamus.
Their transition is estimated to have taken only 10 million years. According to some scientists, this is the shortest time ever taken for any evolutionary transition to occur.
Why would a successful land animal transit into the sea? The answer is attributed to opportunity. Opportunity to feed even better and hence survive.
This is why the teeth is reported to have evolved first.
The next most immediate need for the transiting mammal was the ability to maneuver in its new environment - the waters. Hence the next evolutionary step was modified or specialized ears which helped them to hear properly and navigate underwater.
After this was the changes that occurred to their limbs.
nScientists refer to the Ambulocetus as the species that connects the dots on this one. It is said to have had specialized teeth for hunting, limbs that were already adapted for underwater swimming and hunting but whose tail was still intact as that of a land animal.
Cheers
Answer:
Underwater ears followed by tail flukes and loss of hind limbs.
why is it beneficial for female peacocks to choose to mate with a male peacock with a full colorful trains?
URGENT
Answer:
Peahens often choose males for the quality of their trains -- the quantity, size, and distribution of the colorful eyespots. Experiments show that offspring of males with more eyespots are bigger at birth and better at surviving in the wild than offspring of birds with fewer eyespots.
how does the structural adaptation of seeds help them survive
Answer:
Explanation:
A seed is a plant embryo wrapped in a protective covering. A fruit is the ripened ovary of a plant which contains one or more seeds.
Most plants are rooted in place, which makes dispersing their fruits and seeds particularly important. Seeds that are spread far from the parent plant avoid competition with their relatives for resources and have the opportunity to colonize new areas. Both fruits and seeds have a variety of adaptations for different types of dispersal.
Examples of the some common types of dispersal follow.
Wind
<-- Left : These seeds are transported by air currents. Small fruit or seeds with fine fluff can be carried high up into the air. Herbaceous plants of open areas (like dandelions, cattails, and milkweeds) often have this adaptation. Their seeds float up over neighboring plants even if the parent is growing low to the ground.
Right -->: The fruit of maple trees are also adapted to catch the wind. Many trees (like ashes and sweetgums) have winged fruits or seeds which drop from the tree and are caught by the wind as they fall.
Water
<-- Left : Sea bean seeds are adapted for dispersal by ocean currents. Sea bean vines grow along rivers and coasts. When the pods ripen, they split open and the seeds drop into the water. The beans have a thick seed coat to keep the salt-water out, and have internal structures which make them buoyant enough to float. They can drift for hundreds of miles before washing up onto land.
Coconuts (which are single-seeded fruits) are also adapted for water dispersal. Like sea beans, they have a thick shell to prevent the salt-water from damaging the seed, and the buoyant hull keeps the nut floating.
Animals: internal transport
<-- Left : Brightly colored fruits advertise for dispersers. They are highly visible to birds, promising a nutritious (and often sugary) reward. The seeds are tough and usually undamaged when eaten. They are dispersed when the bird makes a rest stop.
Right -->: Immature seeds in unripe fruit would die if eaten. The green of young fruit hides them among leaves. Unripe fruit are sour or bitter to discourage animals that do find them. Green fruit cling tightly to the plant, making it hard for animals to remove them.
Animals: external transport
<-- Left: Cockle burrs are dry fruit adapted for animal dispersal. The hooked spines catch on the hair (or socks) of passing animals. Dispersal is complete when the animal picks off the offending burr, hopefully dropping it in a new location suitable for growth.
Right -->: Fruit of the unicorn plant have an unusual adaptation for transport. As grazing deer or antelope walk over them, the spines catch around the animals' feet. When the animal finally gets annoyed and shakes the fruit off, dispersal is complete.
Which of the following statements are true of the biomolecule Lipids? Choose all statements that are true.
A. Created by combining a molecule of glycerol with three fatty acids.
B. Composed of Carbon, Hydrogen & Oxygen
C. Examples include sugars, starches & cellulose
D. Are used to store large amounts of energy
E. Are a source of quick energy
The true statements about the lipids are as follows:
A. Created by combining a molecule of glycerol with three fatty acids. B. Composed of Carbon, Hydrogen & OxygenD. Are used to store large amounts of energyLipids are organic compounds made up of fatty acids or fatty acid derivatives that are soluble in non-polar solvents and insoluble in water.
Fats, waxes, oils, hormones, and steroids are examples of lipids.These are polymers of a glycerol molecule with three fatty acids that bind together.These are used to store as a reserved energy source and provides a large amount of energyThe general formula is CH3(CH2)nCOOH which means made up of Carbon, Hydrogen & Oxygen.Thus, the correct options are - A, B, and D.
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(GIVING BRAINLIEST!!)
Which of the following best describes sleet?
A) A liquid form of precipitation that forms in temperatures above 0° C
B) A form of solid precipitation that forms when raindrops freeze
C) Chunks or balls of ice will that will continue to grow larger and become heavier
D) Precipitation that forms in clouds when water vapor freezes into ice crystals
Answer:
b
Explanation:
that defines sleet. sleet is frozen rain
What
process cannot occur in the dark
treatment of photosynthesis?
I WILL GIVE YOU BRAINLYEST!!
Answer:
the complete process
Explanation:
i hope this helped!
Elementary students who eat breakfast have higher grades than those that
don't. For this statement, which could be a hidden variable? Check all that
apply.'
A. The income level of the student's household
B. The amount of breakfast consumed
C. The work schedule of the parent or parents
D. Age of the students
Answer: A and C
Explanation:
AP€X
Can people see the outer layer of the earth from looking out the window? ( yes or no )
Answer: yes
Explanation: there are 4 layers the outer layer is what we live on
The cell cycle begins again after
A. synthesis has copied each chromosome.
B. mitosis has formed two identical nuclei.
C. cytokinesis has formed two new cells.
D. differentiation has made cells specialized.
Answer:
C. cytokinesis has formed two new cells.
Explanation:
Cell cycle has different stages called G1, S, G2, and M. ... This is where the cell actually partitions the two copies of the genetic material into the two daughter cells. After M phase completes, cell division occurs and two cells are left, and the cell cycle can begin again.
Turn on Show element name. What
causes the element name to change?
Answer:
what I didnt understand the question
Explanation:
1. How is the Earth's atmosphere like the insulation of a house?
Answer:
The insulation of a house traps heat in the house to that you furnace is much more energy effevciant in the atmosphere gasses such a carbon dioxide trap heat from the sun in side the atmoaphere.
Explanation:
Which of the following is a true statement about lipids in cell members
A. Hydrophobic lipids heads are attracted to water
B. Hydrophobic lipid fatty acid tails turn turn away(repel)from water
C. A bilayer forms when lipid heads turn toward water inside and outside the cell
D. All are correct
Answer:
it is option B this is correct
Hydrophobic lipid fatty acid tails turn away that is they repel from water as lipids are fat insoluble which are present in cell membrane. Thus, the correct option is B.
What are the lipids in cell membrane?Lipid molecules are hydrophobic in nature. There are three major classes of membrane lipid molecules including phospholipids, cholesterol, and glycolipids. The lipid composition of the inner and the outer monolayers are different from each other, this reflect different functions of the two faces of the cell membrane.
The most important lipid component of the plasma membrane is Fatty acid. An fatty acid is a monocarboxylic acid with a long generally 14 to 24 carbons long chain, it is unbranched, hydrophobic tail which may be either saturated or unsaturated with zero to six cis, non-conjugated double bonds in the compound. The hydrophobic lipid fatty acid tails turn away or repel from water.
Therefore, the correct option is B.
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Are the four daughter cells produced by meiosis identical or unique?
Answer:
i think it's meiosis identical but im not sure please tell me if it's right or not
Answer:
[tex]\boxed {\boxed {\sf Unique \ daughter \ cells}}[/tex]
Explanation:
There are two main types of cell division: mitosis and meiosis. Mitosis makes identical cells for growth and repair.
On the other hand, meiosis is used for sexual reproduction.
In this reproduction, one diploid cell produces 4 haploid gametes/sex cells, meaning they have half of the genetic information. This is so during fertilization, when a sperm and egg combine, the zygote will have a full set of chromosomes.
One of the most important parts of meiosis is called crossing over. In this step, the chromosomes exchange information and create totally unique chromosomes.
This is one reason why siblings, aside from identical twins, can look similar, but not identical!
systolic pressure
A
when atrium is relaxed
B
when the ventricles are relaxed
C
when the atrium contract
D
when the ventricles are contracted
PLEASE I HAVE EXAM RN
Prey
A. An animal that is hunted and killed by another for food
B. Is a way an animal’s body helps sit survive or live in its environment
C.is an animal that eats other animals
Answer: A
Explanation:
i took biology and all that fun stuff with trophic levels
can someone help me asap
Answer:
30
Explanation:
googel......................
How can Punnett Squares help us determine genotypic and phenotypic ratios from a genetic cross?
( Please put it in a complete sentence has to be 4-5 sentence.... i will give brainly)
You are not getting enough oxygen for cellular respiration to occur.
Answer:
Glycolysis, which is the first step in all types of cellular respiration is anaerobic and does not require oxygen. If oxygen is present, the pathway will continue on to the Krebs cycle and oxidative phosphorylation. However, if oxygen is not present, some organisms can undergo fermentation to continually produce ATP.
Hope this is fine for you✌️Which of the following normally leads to the production of functional messenger RNA in eukaryotic cells?
Answer: The removal of portions of RNA known as intervening sequences (introns)
Explanation:
The removal of portions of RNA is known as intervening sequences (introns).
What is the process of splicing?In order to enable the translation of mRNA into a protein, RNA splicing puts together the protein-coding regions (exons) and cuts out the intervening, non-coding segments of genes (introns) from pre-mRNA.
Intron sequences are cut out and exon sequences are joined during the splicing process.
As RNA matures, introns are cut out via RNA splicing, which means that they are not expressed in the resulting messenger RNA (mRNA) product.
In contrast, exons continue to be chemically bound to one another to produce mature mRNA. Exons are expressed sequences, whereas introns can be thought of as intervening sequences.
Therefore, the removal of portions of RNA is known as intervening sequences (introns).
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What needs to happen for natural selection to occur? Highlight all that apply.
A. Some of the traits will provide individuals an advantage over others.
B. Some variation occurs in the inherited traits.
C. A natural disaster.
D. Individuals with certain traits are more likely to have an increased number of offspring
Answer:
A
Explanation:
Natural selection occurs because those with more favorable traits survive while the others don't. If there are no favorable traits in a community then there is no natural selection.
GIVING BRAINLIEST!!! Who ever gives me an absurd answer will get reported. I am giving all of my points for this ;-;
Jem made a table about precipitation, but he made a mistake. Which statement corrects the error in the table?
A) Snow forms when water vapor condenses into water droplets inside clouds.
B) Hail is formed when water droplets collect and freeze into layers to form a chunk of ice.
C) Snow forms when water drops freeze as they pass through a layer of freezing air and form pellets.
D) Water vapor that forms ice crystals that join into flakes is not how snow forms; it is how rain forms.
the hormone is a chemical substance affect the cells growth and it will be accumulate more in the side that faces light
true
false
Answer:
Its partially true!!
the first part is true but 2nd part is false
You can choose False
Evolution can occur in a population when an individual organism adapts to their surroundings, true or false?
Answer:
True
Explanation:
because a new speicies would have just entered their territory and good be a good source of food or could be nice for the land
please help,, i’ll do ANYTHING ,, HELP ASAP
for number 25,, d was fertilization
Answer:
A
Explanation:
when did sexual reproduction have that but anyway its A
What is the overall purpose of meiosis?
Choose 1 answer:
А
To repair damaged body cells
B
To create gametes
To produce a zygote
D
To grow new somatic cells
Answer:
D
Explanation:
The purpose of meiosis is to produce gametes, somatic cells or sex cells. So The answer would be D
To grow new somatic cells is the overall purpose of meiosis.
What do you mean by meiosis?Meiosis is a special type of cell division of germ cells in sexually-reproducing organisms that produces the gametes, such as sperm or egg cells. It involves two rounds of division that ultimately result in four cells with only one copy of each chromosome.
The purpose of meiosis is to produce gametes, the sperm and eggs, with half of the genetic complement of the parent cells. In the figures below, pink represents a genetic contribution from mom and blue represents a genetic contribution from dad.
Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. These cells are our sex cells – sperm in males, eggs in females.
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1 point
2) 'Glucose + Yeast ---> Ethyl
Alcohol + Carbon dioxide' is the
equation of : *
O a) Nitrification
O b) Nitrogen fixation
O c) Pasteurisation
O d) Fermentation
Answer:
d. fermentation is the equation
Plants, algae, and some bacteria use the energy of sunlight in the process of
The process converts the energy from sunlight into chemical energy stored in the bonds
of
Answer:
Photosynthesis and carbohydrates
Explanation:
The process converts the energy from sunlight into chemical energy stored in the bonds of (carbon dioxide/ carbohydrates/ proteins/ water molecules).
Where does energy flow from
Answer:
the sun hot stuff
Answer: Energy flows through an ecosystem in only one direction. Energy is passed from organisms at one trophic level or energy level to organisms in the next trophic level.
If you want to know the main source of energy... the answer is the sun.
How do wetlands form?
Answer:
groundwater comes to the surface and floods the land
Explanation:
Answer:
Groundwater comes to the surface and floods the land
Explanation:
Wetlands form when water and land meet. Where do we see that it talks about water and land? Well, the last one, when groundwater comes up to the surface and it floods the land, it means that it's touching the land....they meet.
Hope this helped!
Have a supercalifragilisticexpialidocious day!
The main source of energy used by the body is found in?
proteins
carbohydrates
fats
minerals
Will give brainliest!This structure contains many heads that reach out and cause the Z-discs to come closer together, thus causing a reaction
A. Number 1
B. Number 2
C. Number 3
D. Number 4
E. Number 5
F. Number 6
G. Number 7
H. Number 8