Answer:
The correct answer would be - Characteristics can be lost in evolution.
Explanation:
The new evidence helps in developing a new hypothesis. In this case, new evidence proved that the Chondrichthyes diverged after the evolution of bone had started instead of before the evolution started. This process called atavism where an ancestral genetic trait reappears after having lost. This leads to loss of the traits in the evolution
This can take place by knocking the mutation out to overriding the gene by the old gene or overriding the new trait by the old trait during the evolution period.
At one time, Chondrichthyes were thought to have diverged from other vertebrates before the evolution of bone. Now we have concluded that the Chondrichthyes diverged after the evolution of bone had started might be their characteristics lost in evolution according to atavism.
What is atavism?
Recurrence in an organism of a trait or character typical of an ancestral form and usually due to genetic recombination. This leads to the loss of the traits in the evolution.
Hence, Chondrichthyes diverged after the evolution of bone had started might be their characteristics lost in evolution according to atavism.
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[GT.02]Which of these qualities helps scientists to choose appropriate methods to date fossils?
O punctuality
O honesty
O creativity
O modesty
Answer:
I think it is creativity, c
Explanation:
A female fish may lay thousands of eggs at once. Which additional statement about fish is most useful for explaining how fish species can evolve by natural selection?
A. All of the fish eggs are genetically identical with one another and with the female parent fish.
B. The environment cannot support unlimited growth of the fish population, so only some fish eggs will mature to adults.
C. After the female fish lays a clutch of eggs, neither parent tends to or cares for the eggs or offspring.
D. Fish eggs will develop into embryos only if they are fertilized by sperm from the male fish.
Answer:
D
Explanation:
A can't be the answer since there is something called mutation which means even twins can't be 100% the same
B can't be since it has nothing to do with natural selection
C can't be sine as B, it has nothing to do with natural selection
A female fish may lay thousands of eggs at once. The additional statement about the fish which is most useful for explaining that the fish species can evolve by natural selection is that the fish eggs will develop into embryos only if they are fertilized by the sperm from the male fish. Thus, the correct option is D.
What is Natural selection?Natural selection can be defined as the differential survival and reproduction of the individual species due to the differences in phenotype of the organism. Natural selection is a key mechanism of evolution, the change in the heritable traits or characteristics of a population which take place over the period of several generations.
A female fish may lay thousands of eggs at once. The additional statement about the fish which is the most useful statement for explaining that the fish species can evolve through natural selection is that the fish eggs will develop into embryos only if they are fertilized by the sperm from the male fish.
Therefore, the correct option is D.
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explain how important is the role of the parents during the earlier stage of development?
Proteins on the surface of vesicles determine where the vesicles go. Which cell organelle provides the instructions for these proteins?
OA. endoplasmic reticulum
OB. lysosome
Ос. mitochondria
OD
nucleus
Answer:
D. Nucleus.
Explanation:
A cell can be defined as the structural, fundamental, biological and functional unit of life. Cells are found in all living organisms because they are the basic unit of life. A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells.
Some examples of cell organelles found in all living organisms such as trees, birds, and bacteria include; nucleus, cytoplasm, cell membrane, golgi apparatus, mitochondria, lysosomes, ribosomes, chromosomes, endoplasmic reticulum, vesicles, etc.
Proteins on the surface of vesicles determine where the vesicles go.
The nucleus is the cell organelle which provides the instructions for these proteins. It controls all the activities taking place in the cell and the synthesis of proteins.
Why is it important for nitrogen to be more abundant in our atmosphere than oxygen?
A. Oxygen is only breathable if diluted with nitrogen.
B. Nitrogen and oxygen combine to produce weather that is essential for life.
C. Oxygen must be diluted because it is a highly combustible gas.
D. Nitrogen is a heavy molecule that pulls oxygen, a light molecule, to the surface for oxygen-dependent life to use.
Answer:
Oxygen must be diluted because it is a highly combustible gas
Explanation:
Oxygen will burn without nitrogen in our atmosphere
the core technique of modern biotechnology is/are
1)chemical engineering
2)genetic engineering
3)both
4)none
Answer:
I'm just guessing it ok I not sure
3)Both
Explanation:
Inclusion bodies may contain which of the following?
Polyhydroxybutyrate
Ribosomes
DNA
RNA
Inclusion bodies may contain Ribosome, DNA, and RNA. The correct option is B, C, and D.
What is an inclusion?It is a type of body that is present in neurons, tissue cells, and like red blood cells, bacteria, viruses, etc. It is a type of protein.
These bodies contain or store fats and sugars in animals and in plants it store glycogen.
Thus, the correct options are B, C, and D.
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Which elements are likely to have similar properties to calcium because they have the same number of valence electrons as calcium
Answer:
The correct answer would be - strontium, magnesium, beryllium.
Explanation:
As we know that the number of the same valence electrons is most likely to exhibit similar physical and chemical properties so the elements of the particular group in the periodic table have a similar number of physical and chemical properties and a similar number of the valence electrons.
For example, group 2 elements are known as alkaline earth metals, and strontium, magnesium, beryllium, and calcium are the same group elements thus, they have the same chemical and physical properties as they have 2 valence electrons.
Check all of the following mechanisms by which early colonizers may positively impact the occurrence of other species through succession. Check All That Apply Early colonizing trees that establish a new habitat may block the sun, inhibiting smaller weeds from colonizing the habitat.Early colonizing trees that establish a new habitat may block the sun, inhibiting smaller weeds from colonizing the habitat. Colonization by plants may provide habitat, facilitating colonization of animal species.Colonization by plants may provide habitat, facilitating colonization of animal species. Early colonizing plants may increase the nutrient level of the soil, facilitating the colonization of other plant species.Early colonizing plants may increase the nutrient level of the soil, facilitating the colonization of other plant species. Animal colonizers may increase pollination of some plant species, facilitating their colonization.Animal colonizers may increase pollination of some plant species, facilitating their colonization. Plant species may alter the chemical composition of the soil, inhibiting other plant species.Plant species may alter the chemical composition of the soil, inhibiting other plant species.
Answer:
Colonization by plants may provide habitat, facilitating colonization of animal species.
Early colonizing plants may increase the nutrient level of the soil, facilitating the colonization of other plant species.
Animal colonizers may increase pollination of some plant species, facilitating their colonization.
Explanation:
The plants provides habitat as well as food to organisms that helps in the colonization of that organisms because every organism needs food and living place for its survival. Some plants increase the nutrient level in the soil through fixation of nitrogen which leads to the colonization of other plant species in that environment. Some animals causes pollination of plants which helps them in their colonization so all these organisms have a positive impact on the occurrence of other species.
ASAP HELP CER
What you know about DNA and protein CER.
- has to explain the structure and function of DNA and proteins.
Explanation:
DNA is the information molecule. It stores instructions for making other large molecules, called proteins. These instructions are stored inside each of your cells, distributed among 46 long structures called chromosomes. These chromosomes are made up of thousands of shorter segments of DNA, called genes.
Which choice refers to a single population ?
a. The zebras
b. The plants
c. The animals
d. The water
Answer:
guy above me is correct
Explanation:
Susan suffered from a heart attack. When the doctors tested the heart muscle they found that she
had an increased ratio of lactic acid to pyruvic acid in her heart tissue. What does this say about
the availability of oxygen in her heart muscle cells?
Answer:
The heart cells had no received adequate oxygen supply.
Describe how hibernation has helped bear species to survive.
write your answer in form of a claim, evidence, and reasoning statement.
1.Make a claim to answer the question(restate your question).
2.Give evidence to support your claim(my evidence is).
3.Use reasoning to explain how your evidence supports you claim(this shows).
ty please no scams brainliest also to the first person who answers and at least 5 sentence answer ty.
Answer:
Hibernation helps animals survive the changing seasons. Foods that bears eat, such as berries and flowers, are much less available during cold winter months. When they hibernate, bears enter a deep sleep. ... While they sleep, the bears can survive because their bodies live off of their stored fat or food.
During hibernation, the animal’s body temperature, heart rate and breathing rate all drop to significantly lower levels. Animals do this to survive the winter because the weather is cold and food is scarce. It is advantageous because these animals can quite literally shut themselves off for weeks at a time rather than try and survive through harsh weather conditions.
While many people think bears are hibernators, they actually participate in a similar, though not exact, practice. Instead of hibernating, bears fall into a deep sleep called torpor. During torpor, heart rate and breathing rate decreases, body temperature reduces slightly and bears do not eat or release bodily waste. Bears can sleep more than 100 days without eating, drinking, or passing waste!
Bears sleep in dens that they make themselves, as well as in hollow trees, caves and dens built by other bears. A den can be built in 3–7 days, however, the timing of den building varies from bear to bear. While some bears build their dens months before hibernation season, others choose to excavate their dens.
These animals can dramatically drop their body temperature to below freezing—salty body fluids work to prevent tissue crystallization in particularly cold temperatures.
So really, animals that are true hibernators don’t actually sleep through the entire winter.
The urea produced by their fat metabolism is broken down and the nitrogen is re-used by the bear to rebuild protein.
Explanation:
Plants, like all organisms, adapt to the conditions of their environment. Some special challenges a plant may face are drought, flooding, and a salty environment. Your task is to identify and describe ways that plants adapt to these challenging conditions in their environment. Select one plant adaptation to drought, one adaptation to flooding, and one for salt tolerance. Explain how each adaptation enhances plant survival. Identify a scholarly source of information for each
Answer:
Hydrophytes is flood tolerant plants, barley is salt tolerant crop and sorghum is a drought tolerant crop.
Explanation:
Hydrophytes also known as flood tolerant plants that have adaptations to survive flood problems. The plant has the development of air spaces in the roots and stems which allow diffusion of oxygen from the aerial portions of the plant into the roots. Barley shows a greater degree of salt tolerance by applying method of osmoregulation which helps the plant to tolerate salt stress. Sorghum is a plant that is adapted to drought condition. These plants have less number of stomata and waxy layers on the leaves which lowers the rate of evaporation or transpiration.
Answer:
C,B
Explanation:
n rabbits, coat color is affected by a series of alleles with a hierarchy of dominance such that C >Cch>Ch>C. Each allele is dominant over all the alleles listed to its right. C codes for full color, Cch codes for chinchilla, Ch codes for himalayan (white with black extremities) and C codes for albino. A chinchilla rabbit is mated to a himalayan rabbit. Each of these rabbits had one albino parent. What are the phenotypes of the offspring and in what frequencies will they be produced
Interferons play a vital role in the immune system. Why are interferons so important?
Interferons can interfere with viral replication
Interferons can inhibit cell division
All the answers above are correct
Interferons can combat bacterial and parasitic infections
Answer: all the answers above are correct
Explanation:
9. Which nucleus has role in conjugation in Paramecium
a) Mega nucleus
b) Micronucleus
c) Macronucleus
d) Cellular nucleus
( b ) Micronucleus has role in conjugation in paramecium.
The organism's germ line genetic material is kept in the micronucleus. It is in charge of the genetic rearrangement that takes place during conjugation and generates the macronucleus (cross-fertilization). Thus option B is correct.
What Micronucleus role in conjugation in Paramecium?The pairing and subsequent fusion of two paramecia is a process known as conjugation. It is known as a cytoplasmic bridge where they converge. After meiosis, the diploid micronucleus divides into four new micronuclei. The micronuclei of the cell, all except one, break down.
This method doesn't include meiosis or nuclear fusion. It manifests in a single person in the manner described below: Macronucleus deteriorates and vanishes. Eight nuclei are produced after the two micronuclei divide twice through mitosis.
Therefore, Micronucleus has a role in conjugation in Paramecium.
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Describe two types of tumors, and indicate which type is harmful and which is not.
A benign tumor is not a malignant tumor, which is cancer. It does not invade nearby tissue or spread to other parts of the body the way cancer can. In most cases, the outlook with benign tumors is very good. But benign tumors can be serious if they press on vital structures such as blood vessels or nerves. A malignant primary tumor is more dangerous because it can grow quickly. It may grow into or spread to other parts of the brain or to the spinal cord. Malignant tumors are also sometimes called brain cancer.
Dominique is a chemist and has just discovered a new drug that interferes with the Calvin Cycle of photosynthesis. They believe this drug is going to be awesome because it will allow the light reactions to run forever, while just stalling out the Calvin cycle. Terry disagrees, saying that any drug that stalls Calvin will ultimately inhibit the light reactions, too. Who is correct and why
Answer:
Terry is right.
Explanation:
Any drug that stalls Calvin will ultimately inhibit the light reactions because the Calvin cycle and light reactions are interconnected. The light reactions provide CO2 to the Calvin cycle while on the other hand, the Calvin cycle provides sugars to light reaction in order to produce ATP molecules from it so if Calvin cycle stops no sugar is provided to the light reaction for generating ATP molecules.
What is biomass burned to produce
Answer:
Burning either fossil fuels or biomass releases carbon dioxide (CO2), a greenhouse gas. However, the plants that are the source of biomass for energy capture almost the same amount of CO2 through photosynthesis while growing as is released when biomass is burned, which can make biomass a carbon-neutral energy source.
What is the term for a number or amount of things?
A. Force
B. Quantity
C. Mass
D. Coordinate
Answer:
B:Quantity
Explanation:
hope this helps
What needs to happen in order for two populations to be isolated?
Answer:
Isolation means that organisms of the same species are separated, and happens when there is something between the organisms that they can't cross.
Explanation:
Organisms become isolated as a result of environmental change. The cause of isolation can be gradual, like when mountains or deserts form, or continents split apart.
A compact cluster of spore-bearing structures in
some seedless vascular plant sporophytes.
Answer:
B :)
Explanation:
What does a recombination frequency of 50% indicate regarding linkage?
Answer:
Explanation:
A recombinant frequency significantly less than 50 percent shows that the genes are linked. A recombinant frequency of 50 percent generally means that the genes are unlinked on separate chromosomes. The remainder of this chapter focuses mainly on linked genes and recombinants arising from crossing-over.
Answer:
A recombinant frequency significantly less than 50 per cent shows that the genes are linked.
Explanation:
A recombinant frequency of 50 per cent generally means that the genes are unlinked on separate chromosomes.
Which organization would not have to abide by OSHA guidelines?
a. nuclear plant
b. religious-based corporation
c. family run business with only local employees
d. all organizations must abide by OSHA guidelines
Correct ans: Nuclear plant :)
Answer:
b. religious-based corporation
During follicular phase which hormones have highly secreted in mentrual cycle
Answer: The follicular phase of the menstrual cycle is defined as the first day of menstruation until ovulation. It is initiated by a rise in follicle-stimulating hormone (FSH) levels at the first day of the cycle. This is triggered by a decrease in progesterone and estrogen (which act to inhibit FSH secretion).
Explanation: hope this helps
May someone help with this match each one pls
After studying prokaryotic and eukaryotic cells, what do scientists believe?
Answer:
Scientists believe that mitochondria evolved from aerobic, or oxygen-consuming, prokaryotes. ... Eukaryotic cells also contain a variety of structures and organelles not present in prokaryotic cells.
Define the following terms:
1. Shadow
2. Pinhole camera
3. Screen
Answer:
shadow
Explanation:
a dark area or shape produced by a body coming between rays of light and a surface
Through what process do eukaryotes reproduce asexually?
Answer:
It is the characteristic feature of eukaryotic cell that it reproduces sexually. But, it can also reproduce asexually. Asexual reproduction is often referred to as cell division and it occurs through mitosis. On the other hand, sexual reproduction occurs through meiosis.
Explanation:
pls tell me if im wrong ill change it
Answer:
Eukaryotes grow and reproduce through a process called mitosis. Some eukaryotic organisms also reproduce asexually through processes such as budding, regeneration, and parthenogenesis.
Explanation: