Answer:
Secretion, in biology, production and release of a useful substance by a gland or cell; also, the substance produced. In addition to the enzymes and hormones that facilitate and regulate complex biochemical processes, body tissues also secrete a variety of substances that provide lubrication and moisture.
Explanation:
a branch of alleges typically once studied in higher education
Answer:
Branch of knowledge.
Hope it helps!!!
Which event occurred during the Space Race
Answer:
I think it is Sputnik not sure but try it
Answer: The U.S launched Explorer 1 into space.
Explanation:
Plz help me well mark brainliest if you are correct!
Which characteristic is shown by doing the laundry even if a person dislikes doing it?
problem solving
self-discipline
aggression
sibling rivalry
Answer:
Self-Discipline
Explanation:
The others do not make sense.
Let me know if I have helped! :>
5. Which of the following statements is true about natural systems?
Answer:
im sorry i dont see and question or anwsers to help maybe tryb reposting
Explanation:
Answer:
B. Producers are at the bottom level of both the energy pyramid and the biomass pyramid.
Explanation:
Both the biomass pyramid and the energy pyramid have producers at the bottom.
Producers account for most of the biomass and most of the available energy in any given ecosystem.
The limiting nutrient to plants is often
A. usable nitrogen
B. protein
C. liquid water
At which position is the northern hemisphere experiencing spring?
Point A
Point B
Point C
Point D
Answer:
c
Explanation:
When plants that are true breeding for different traits of a
characteristic are crossed, the trait observed in the first generation
is called the
a. dominant trait.
b. recessive trait.
c first-generation trait.
d. second-generation trait.
Which of the following are amniotes? O Birds, reptiles, and amphibians O Reptiles, birds, and dogs O Cnidarians, reptiles, and mammals O Amphibians, birds, and cnidarians
Answer:
reptiles, birds and animals
Explanation:
amniotes are animals whose embryo develops in an amnion and chorlion and have an allanton.
they lay their eggs on land or retain them within the mother.
What is needed for evolution to take place?
Answer:
genetic variation
Explanation:
5-10 statistics or interesting facts about kingdom Protista
What grade are you in?
Describe the competitive exclusion principle and its effects on competing species
Weather is made up of a variety of conditions in the atmosphere. It includes temperature, or the amount of ____ in the air, as well as humidity, the amount of ____ in the air. Pressure is another factor of weather as it affects wind, or the motion of ____. Precipitation also affects weather, and includes ____ and other forms of water that falls from clouds.
I don't have an answer, but your doing this in college, when I need this in my 6th grade earth science? dang lol
What are the three parts of a neucleotide
Each nucleotide, in turn, is made up of a nitrogenous base, a pentose sugar, and a phosphate.
Can you help, please?
Answer:
D
Explanation:
Plz help me well mark brainliest if you are correct!
Answer:
A
Explanation:
A meteor is a rock falling from the galaxy and usaully is burning because of the atmosphere.
A macaw is a type of parrot with colorful feathers that flies about in the upper canopy of trees in tropical rainforests. Macaws have a diet which includes fruits, leaves, nuts, and seeds of plants. Which of the following describes a biotic factor of the macaw's habitat that provides a survival advantage for these birds?
Answer:
Trees provide shelter and abundant food supplies
Answer:
Trees provide shelter and abundant food supplies.
Explanation:
Living Trees
Trees support the lives of many large organisms. Trees are used for food, shelter, and sites for reproduction. Many animals also use trees for resting, nesting, and for places from which to hunt or capture prey.
natural selection vs artificial
Answer:
Please read the explenation for I must go into detail to explain this.
Explanation:
So before I answer your question, I am going to explain what the two things are.
Natural selection:
Natural selection is the evolution of traits in a species due to changes in genetics that is mainly caused by enviormental problems and changes.
If this is a bit confusing, here is an example:
Lets say that a Mandarin beatroot lizard is being killed off by the Mandarin carrot bird because all the trees in the area have turned yellow. 100 years from the time this happened, the Mandarin beatroot lizard that's population was 85% red and 15% yellow is now 90% yellow and only 10% red.
This is because of natural selection. THe Mandarin carrot bird was killing a large portion of the red population. The yellow population was killed only occasionaly. When the Madarin beatroot lizard went to breed, there were more yellow lizards breeding than red lizards. If you know how genetics work, then you know that in simple terms, this means more lizards will be yellow in the next genetration.
Slowl;y as the generations passed, more and more yellow lizards were bred and born. 100 years later, over generations and generations, the population was almost coimpeltly yellow.
Artifical selection:
Artifical selection is where the human race selects a species and bred specific organisms of that species so that the specific trait being bred for is more evident in the species.
Again, if this is confusing, here is an example:
The lab NV-110 was taking bearlybubble wolves with shorter noses and breeding them together. After 30 years, and many generations, the bearlybubble wolves had noses that were half a inch shorter than the orginal bearlybubble wolves. When the new wolves were let into the forest they had been taken from, half of the died in the first week due to starvation.
The humans took specific traits in a species and bred them together, this process was repeated over 30 years. The specific trait of the new generation of orgniasms has been changed, but this change affected the orgnaisms survive, and was dentrimental to the species.
So now knowing the two things, what do you think the difference is? Think about ti for a minute before reading more.
The difference betweent the two types of selection is:
Artifical selection can harm or possibly nuetral for the organism, wheareas natural selection will be helpful or nuteral to the organism.Artifical selection involves humans, wheareas naturals election does not,Artifical selection does not need any specific change in the enviorment or world to happen, wheareas natural selection does.Artifical selection is usally quicker than natural selction for artificial selection is purposful breeding, whereas natural selection is by-chance breeding.I hope this make sense to you, I can try to make this simpler or more detailed if you want me to. ;)
Each node, or intersection, on a cladogram represents a/n _______ between two species.
4. A woman with defective tooth enamel (autosomal recessive) and normal color vision, (X-linked) who had a color blind father with normal tooth enamel and a mother with normal vision and defective tooth enamel, marries a color blind first cousin with normal tooth enamel who had a father with defective tooth enamel. What is the probability of their having a child with normal tooth enamel and color blindness
Answer:
The probability of their having a child with normal tooth enamel and color blindness is 3/8 or 0.375
Explanation:
Let the alleles for normal and defective tooth enamel be T and t respectively.
Color blindness is on the X-Chromosome. Let the allele normal vision and colour blindness be Xn and Xc respectively.
The woman had a colour blind father (XcY) and a normal vision mother, so her allelic pair for vision will be XnXc.
Her father had normal tooth enamel while her mother had a defective tooth enamel, therefore, she will have the allelic pair, Tt.
Her genotype for vision and tooth enamel will be XnXcTt.
Her husband who is color blind with normal tooth enamel had a father with defective tooth enamel, tt. Therefore, her husband's genotype for vision and tooth enamel will be XcYTt.
From the dihybrid cross of XnXcTt and XcYTt, the following offspring are obtained:
XnXcTT, XnXcTt, XnYTT, XnYTt
XnXcTt, XnXctt, XnYTt, XnYtt
XcXcTT, XcXcTt, XcYTT, XcYTt
XcXcTt, XcXctt, XcYTt, XcYtt
From the results of the cross, a child with normal tooth enamel and color blindness will have the following genotypes: XcXcTT, XcXcTt, XcYTT, XcYTt, XcXcTt, XcYTt.
Probability of their having a child with normal tooth enamel and color blindness = 6/16 = 3/8 or 0.375
Plz help me I am timed!!
Plzzz well mark brainliest!
Answer:
Its A
Explanation:
These animals are similar in many ways except for which one of the following?
A. Both lay eggs on land.
B. Both can survive on land or in water.
C. Both mothers stay close to their eggs.
O D. Both look like adults, only smaller.
Describe the differences and similarities between lecithin and cephalin. Match the words in the left column to the appropriate blanks in the sentences on the right. ResetHelp Lecithins and cephalins are both sphingolipids; they consist of glycerol with fatty acids forming bonds with the first and second groups. The third group of the forms a with phosphoric acid, which forms another bond with an amino alcohol. In lecithins, the amino alcohol is ; in cephalins, the amino alcohol is usually .
Answer:
Here, we have a composition passage and we are required to fill in the with missing words. The missing words are highlighted in bold format and underlined.
Lecithins and cephalins are both glycerophospholipids; they consist of glycerol with fatty acids forming ester bonds with the first and second hydroxyl groups. The third hydroxyl group of the glycerol forms a phosphate bond with phosphoric acid, which forms another phosphate bond with an amino alcohol. In lecithins, the amino alcohol is choline; in cephalins, the amino alcohol is usually ethanolamine.
Explanation:
Lecithin is a chemical complex composed primarily of fatty acids, glycerol, phosphoric acid, and choline. It can be present in egg yolks, soybeans, sunflower seeds, and plant seed cells and is completely normal. Soybean and sunflower lecithins contain much more important fatty acids than rapeseed lecithin, making them nutritionally more useful.
Phosphatidylethanolamine, also known as cephalin, is a phosphoglyceride that, like phosphatidylcholines and lecithins, is a component of biological membranes. A glycerol residue esterified by two fatty acids and a phosphoethanolamine residue gives rise to phosphatidylethanolamines. They're made by combining CDP-ethanolamine with diglycerides and releasing a CMP molecule. Phosphatidylcholines are formed when S-adenosylmethionine methylates the amine in ethanolamines. They're mostly found in the inner layer of plasma membranes' lipid bilayers.
50 POINTS 4. The age of the Canyon Diablo meteorite was determined by
A) carbon-14
B) uranium-235
C) hydrogen-3
D) potassium-40
Answer:
The answer is uranium have an awesome day!
How did NASA help to uncover the adaptations that are made due to living in extreme environments?
By analyzing changes in one twin on Earth and the other in space.
By introducing animals and other organisms that could be studied in space.
By running experiments on astronauts that were in space for over a year
By observing changes in retired astronauts over a period of ten years.
Answer:
A
Explanation:
I took this at flvsa lol
The evolutionary species concept defines a species as: A. a group of populations that have shared a past and will have a shared future B. reproductively isolated populations C. smallest monophyletic taxa D. morphologically similar populations
Answer:
The correct option is A.
group of populations that have shared a past and will have a shared future
Explanation:
This is because evolutionary species concept is a concept that indicate a form of ancestry descendants or lineage of populations that descend from the same ancestors possessing similar characteristics which were inherited from the ancestry and these traits are evident in the future.
1. Which of the following solid substances could be classified as the most dense?
A. Solid A
B. Solid B
C. Solid C
D. It cannot be determined from the given information.
Choose The Correct one answer.
Which statement below would best illustrate the concept of natural selection?
A an organism can return to the characteristics of its ancestors
B a population of animals will move from one region to another
those organisms that are best adapted to the environment will survive to produce more offspring
D all organisms are made up of cells
Answer:
C. those organisms that are best adapted to the environment will survive to produce more offspring
Explanation:
Natural selection is a key concept in the formulation of the theory proposed by Darwin in 1859. Natural selection is defined as the main force that drives the prevalence and the increase of advantageous phenotypic traits. Selection natural acts by differential survival and reproduction of individual organisms that have better adapted to the environmental conditions in which these organisms live. These organisms with a greater adaptive fitness have more chances to survive and reproduce, thereby transmitting (and perpetuating) their genes to the following generations.
Answer:
those organisms that are best adapted to the environment will survive to produce more offspring
Explanation:
those organisms that are best adapted to the environment will survive to produce more offspring
Traits or structures that likely developed from common ancestors are called _______ structures.
Answer:
I believe these are called homologous structures.
Explanation:
Homologous structures are similar to each other and likely descend from common ancestors.
All of the following have been accomplished by space programs except-
A. placing semi-permanent structures in earth’s orbit
B. landing spacecraft on planets other than our own
C. sending spacecraft into orbit that allow us to study the universe in greater detail
D. develop technology and resources capable of sending the general population into space on a regular basis
Answer:
D
Explanation:
Develop technology and resources capable of sending the general population into space on a regular basis.
What is Developmental Technology?L. Mumford presented an intriguing theory regarding the origin of technology, contending that biotechnology gave rise to both machine and gun technology.
Technique is derived from the characteristics of how people behave and, in its earliest forms, is directly tied to the origin of man. It was first and foremost life-focused, and only afterwards was it work-focused.
According to L. Mumford, technique with a focus on power and output developed much later. He held that the impersonal aspects of human adaptability to the outside world are what give origin to technology.
Therefore, Develop technology and resources capable of sending the general population into space on a regular basis.
To learn more about Technology, refer to the link:
https://brainly.com/question/9171028
#SPJ3
