Answer:
the answer is c
Explanation:
not much else to explain
which on is viviparous :
a. shark b. frog
c. Whale d. lungfish
Answer:
whale
Explanation:
because they give direct birth to young ones
Explain how fluctuations in abiotic cycles can influence populations.
Answer:
Populations are influenced by fluctuations in any of the abiotic cycles. The fluctuation of seasonal cycles can cause populations to hibernate, migrate, or breed. Organisms hibernate as a result of seasonal fluctuations that cause them to have a limited resource supply.
Which states the sequence of contractions in one heart beat?
A)
left atrium and left ventricle together, pause, right atrium and right ventricle together
B)
left atrium, left ventricle, right atrium, right ventricle, pause
C)
right atrium and left atrium together, right ventricle and left ventricle together, pause
D)
right atrium, right ventricle, left atrium, left ventricle, pause
Which does not provide for enhanced genetic mixing?
A.Mix-matching
B.Random segregation
C.Crossing over
D.Fertilization that occurs through sexual reproduction
Answer:
A. Mix-matching
Explanation:
Sexual reproduction increases genetic variation in offspring by three main mechanisms: 1-random assortment of chromosomes during meiosis 2-genetic recombination, and 3-random fusion of gametes from different parents. In the first place, the pairs of homologous chromosomes are randomly oriented in metaphase I before they separate in Anaphase I. In consequence, daughter gamete cells receive different combinations of chromosomes. Second, recombination (also called crossing over) refers to the interchange of genetic material between non-sister chromatids during prophase I, thereby also increasing genetic variation in daughter cells. Third, the fusion of two haploid cells (i.e., gametes) in diploid organisms results in the formation of a single zygote cell that develops into a new organism, thereby the process of random fertilization between any two gametes generates different diploid zygotes, increasing thus genetic diversity.
Which of the following is not true about hydrothermal vents?
A. They provide a look into what ancient life may have looked like.
B. They contain chemosynthetic organisms.
C. They cannot contain life of any sort.
D. They are found in volcanic areas under the ocean.
C, because that would contradict observations
Answer:
its (c) cz....
Explanation:
The floor of the deep ocean is almost devoid of life, because little food can be found there. But around hydrothermal vents, life is abundant because food is abundant. ... These vents are the only places on Earth where the ultimate source of energy for life is not sunlight but the inorganic Earth itself. hope it helps u I tried my best.pls mark me as branliestThe chlorophyll in producers captures _________, and transforms this to chemical energy stored in __________.
Answer:
sunlight energy is the correct answer to the question
what is a tropic level? give an example
Answer:
Trophic Level Definition. A trophic level is the group of organisms within an ecosystem which occupy the same level in a food chain.
Examples of Trophic Level. Primary producers, or ”autotrophs”, are organisms that produce biomass from inorganic compounds
Explanation:
Which of the following substances will cross the cell membrane through
osmosis?
O A. Large proteins
O B. Water
O C. Sodium ions
O D. Nonpolar molecules
which structure is found in both plants and animal cells
Answer: Animal cells and plant cells share the common components of a nucleus, cytoplasm, mitochondria and a cell membrane.
Answer:
the nucleus
Explanation:
(06.01 MC)
When Linnaeus began classifying organisms in the 1700s, he categorized them as plant, animal, or mineral. These kingdoms were later revised to exclude minerals and expanded to include animals, plants, fungi, protists, and bacteria. Which of the following best explains a reason for this change? (2 points)
Group of answer choices
As new organisms were discovered, new kingdoms were created to sort them based on ability to interbreed.
It was discovered that the organisms in each of the five kingdoms have a different method of obtaining nutrients and are therefore fundamentally different.
Technological advances led to the discovery of single-celled organisms and increased our understanding of relationships between organisms.
Genetic research led to the discovery that each of these five kingdoms has a unique evolutionary ancestor.
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"" what is photosynthesis "'
[tex]\sf{\overline{\underline{PHOTOSYNTHESIS }}}[/tex]
Photosynthesis is a chemical reaction that takes place inside a plant, producing food for the plant to survive.Carbon dioxide, water and light are all needed for photosynthesis to take place.Photosynthesis happens in the leaves of a plant.
Hurry plz
Select each item in the left column and its match in the right column.
Answer:
Explanation:
Diploid - Having pairs of chromosomes
Chromosome - A strand of DNA wrapped around a protein
Haploid - Having only one set of unique chromosomes
DNA - The molecule that carries genetic information
Sex Chromosome - An X or Y chromosome
Homologous Chromosome - A pair of chromosomes that contain information for the same traits
True or false? Phototropism only happens after plants move from darkness into the light.
Group of answer choices
False
True
Answer:
phototropism only happens after plants move from darkness into the light (false)
Answer:
The answer is false.
Explanation:
During the process of genetic recombination, crossing over occurs between two nonsister chromatids. DNA segments are exchanged between two nonsister chromatids during meiosis I. None of the above. maternal and paternal chromosomes pair and physically exchange DNA segments. All of the above.
Answer:
DNA segments are exchanged between two non-sister chromatids during meiosis I.
Explanation:
An exchange of chromosome segments or parts between non-sister homologous chromatids occurs which is also called crossing over. This crossing over occurs in the meiosis I that is responsible for the variation in the offspring produced. The formation of hybrid species occurs due to this exchanged of DNA segments between two non-sister chromatids.
A person with curly hair has children with a person who has straight hair. All children in the F1 generation have wavy hair. What kind of inheritance pattern explains this phenomenon? What would the F2 generation look like, i.e., what would the genotype and phenotype ratios be if two wavy haired individuals had children
Answer:
The correct answer is -
a. incomplete dominance
b. f2 = 1:2:1 = straight:wavy:curly
Explanation:
In this question, it is given that a person with curly hair and a person with straight hair has all children with wavy hair. It means that the heterozygous offspring in F1 has blended traits which means this trait shows incomplete dominance. Suppose C is curly hair c is straight hair then f1 offspring will have Cc (wavy hair)
now in F2:
cross: Cc cross with Cc
gametes: C, c
Punnett square:
C c
C CC Cc
c Cc cc
Thus, the genotype and phenotype ration would be :
genotype: 1:2:1 = CC:Cc:cc
phenotype: 1:2:1 = straight:wavy:curly
what is carrageenan ?
Answer:
Carrageenan is an extract from a red seaweed commonly known as Irish Moss. This edible seaweed is native to the British Isles, where it's been used in traditional cooking for hundreds of years. It's also widely used in the food industry, mostly as a thickener and gelling agent.
Which structure is represented by the letter C?
Choose 1 answer:
A
Chloroplast
B
Mitochondria
C
Vacuole
D
Nucleus
Answer:
A. Chloroplast
Explanation:
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Answer:
A chloroplast
Explanation:
_____ are members of the domain Eukarya.
Archaebacteria
Viruses
Bacteria
Fungi
Answer:
Fungi are members of the domain Eukarya. Cells of fungi contain a nucleus which allows them to be members of this domain
Explanatio
Which mutations are generally dominant since one copy in a diploid organism is sufficient to alter the normal phenotype
Answer:
The correct answer - Gain of function.
Explanation:
"Gain of function" is a type of mutation that makes one of the allele in diploid organism to change the normal behavior or trait which them dominant mutations.
Answer:
gain of function
hope it helps!!!!
what is a skeleton and give two characteristics of a mammal
A skeleton is a structural frame that supports an animal body.
The skeletal system of mammals and other vertebrates is broadly divisible functionally into axial and appendicular portions.
There are two major types of skeletons: solid and fluid. Solid skeletons can be internal, called an endoskeleton, or external, called an exoskeleton, and may be further classified as pliant (elastic/movable) or rigid (hard/non-movable).
Fluid skeletons are always internal.
The presence of hair or fur.
A four-chambered heart.
Answer: well I know the skeleton is the bone structure in some living organisms if there a vertebrate
A meiotic error occurred during gamete formation, resulting in an egg that has 24 chromosomes. If that egg is fertilized by a normal sperm, how many chromosomes will be in the zygote
Answer:
47 chromosomes
Explanation:
Meiosis is a kind of division that reduces the chromosome number of the daughter cells by half i.e. 2n - n. It occurs only in reproductive cells to produce sex cells or gametes. In humans, meiosis occurs to produce gametes (egg and sperm) that have 23 haploid chromosomes.
N.B: Somatic human cells have 46 chromosomes
According to this question, a meiotic error occurred during gamete formation, resulting in an egg that has 24 chromosomes. If that egg is fertilized by a normal sperm i.e. sperm with 23 chromosomes. A zygote that posseses (23 + 24) = 47 chromosomes will be produced.
What is the difference between food chains and food webs?
1. Food webs show the flow of energy from producers to consumers, and food chains show the flow of energy from consumers to producers.
2.Food chains show a single path of energy in an ecosystem, and food webs show overlapping pathways of energy in that ecosystem.
3.About ten percent of the energy is passed on to the next trophic level in food webs, but in food chains, about ninety percent is passed on to the next trophic level.
4.Heat is lost when energy is passed on to the next trophic level in food chains, but in food webs, heat is not lost when energy is passed on to the next trophic level.
Answer:
2. Food chains show a single path of energy in an ecosystem, and food webs show overlapping pathways of energy in that ecosystem.
Explanation:
A food chain is a single chain representing who eats whom in a system of organisms. A food web is a system of food chains, involving overlapping pathways of different foodchains.
Answer:
2.Food chains show a single path of energy in an ecosystem, and food webs show overlapping pathways of energy in that ecosystem.
Explanation:
A food chain shows only a targeted path, while a food web shows a more realistic path. See attached photos.
First picture: Food Chain: Notice how it only shows one path from producer to tertiary consumer.
Second picture: Food Web: Notice the many pathing that connects for certain organisms in the food web. It shows a more realistic distribution of energy in a real world scenario.
how is the structure of endoplasmic reticulum related to its function?
Answer:
The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function. The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.
what a meteor is called before it enters Earth’s atmosphere
Answer:
A meteor, before entering earth's atmosphere is known as a meteoroid
When a cell uses fatty acids for aerobic respiration, it first hydrolyzes fats to Group of answer choices glycerol and fatty acids. glycerol and amino acids. fatty acids and sugars. sugars and glycerol.
Answer:
glycerol and fatty acids.
Explanation:
Fats as biological molecules can be used as energy sources by the cell when there is low or no carbohydrate (glucose) for use.
Fats, mainly triglycerides enter metabolic pathway in an aerobic condition where they undergo catabolism to produce glycerol and fatty acids, their monomeric units. This process leads to the synthesis of ATP (Adenosine triphosphate). In other words, fats are hydrolyzed to glycerol and fatty acids
There are 3 basic structural types of joints: fibrous, cartilaginous, and synovial. If a joint does NOT move, you can assume that it's either ___ or ___. (Choose 2).
Answer:
The correct answer is - fibrous, cartilaginous.
Explanation:
In the body, there are joints named after the type of tissue attached to them and these joints are:
1. fibrous joints - these are connected with dense connected tissues and called immovable or fixed joints.
2.cartilaginous joints - these are joined by cartilage tissue. These joints are also not able to move freely.
3. synovial joints are known as movable joints and can move freely. These are present in a fluid-filled capsule for better movement.
Explain how the discoveries by Rosalind Franklin helped Watson and Crick build an accurate model of DNA.
Answer:
Rosalind's x-ray showed that the ladders of nucleotides were inside a double helix.
Watson and Crick built models with the ladders on the outside.
Why do many plants have specialized cells that produce colorful flowers?
O A. To collect more sunlight
B. To attract insects
C. To attract prey
O D. To scare away predators
Answer:
It's B, to attract insects. :)
Explanation:
There are little birds that spend a great deal of time on the back of a rhinoceros and eat the blood-sucking ticks out of the rhino's ears. The rhino greatly benefits from the relationship, since it cannot remove the ticks itself. The tick-rhino relationship is an example of ________.
Answer:sen
Explanation:when both parties mutually benifit from one another
You cross a red flower with a white flower, and all the seeds result in pink flowers. This is an example of
Answer:
Di truyền trội lăn không hoàn toàn
Explanation: