1. Deciduous trees lose their leaves seasonally and include trees such as cedar and maple.

a. True
b. False

2. Hardwoods reproduce using flowers and have broad leaves; hardwoods include trees such as mango, elm, and pine.
a. True
b. False

3. Conifer leaves are generally thin and needle-like, while seeds are contained in cones. Conifers include pine and elm.
a. True
b. False

4. Evergreens are plants that maintain their leaves in all seasons and include trees such as cedar, mango, and pine.'
a. True
b. False

Answer:

to be considered a species, a population must be reproductively isolated from other species

Answer: nucleolus: a small dense spherical structure in the nucleus of a cell during interphase. nucleus: the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass. ribosome: a minute particle consisting of RNA and associated proteins found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins. vesicle: a small fluid-filled bladder, sac, cyst, or vacuole within the body. rough endoplasmic: reticulum (RER), series of connected flattened sacs, part of a continuous membrane organelle within the cytoplasm of eukaryotic cells, that plays a central role in the synthesis of proteins. Golgi apparatus: a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport.

Explanation:

Answer:

Both deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are composed of nucleotides. A nucleotide is composed of three smaller molecules; a five-carbon, a phosphate group, and a nitrogenous base.

A DNA nucleotide contains the five-carbon sugar deoxyribose, a phosphate group, and one of four nitrogenous bases; adenine (A), guanine (G), cytosine (C), and thymine (T).

RNA  contains the five-carbon sugar ribose, a phosphate group, and one of four nitrogenous bases; adenine (A), guanine (G), cytosine (C), and uracil (U). Uracil takes the place of thymine (T).

Both thymine and uracil pair with adenine.

So DNA and RNA nucleotides differ according to which five-carbon sugar is present, and whether the nitrogenous base thymine or uracil is present. DNA contains the sugar deoxyribose, while RNA contains the sugar ribose. DNA contains the nitrogenous base thymine, while RNA contains the nitrogenous base uracil.

Explanation:

Answer: Ari draw a food web.

Explanation:

A single ecosystem which contains all the food chains is called a food web.

In a food web each living thing present in a food web is a part of multiple food chains. Hence, food webs tend to represent the overlapping of food chains in that ecosystem.

The flow chart drawn by Ari represents that the living things present in cycle 1 are part of cycle 2 and cycle 3. Also, living things present in cycle 2 are part of cycle 1 and cycle 3.

A food chain is basically a single path where each organism is dependent of the other as a source of food without any overlapping.

Thus, we can conclude that Ari draw a food web.

Answer:

c

Explanation:

Answer:

carbon dioxide is more soluble in water than oxygen and hence is mostly transported in the dissolved form in our blood.

Carbon dioxide can be transported through the blood via three methods. It is dissolved directly in the blood, bound to plasma proteins or hemoglobin, or converted into bicarbonate.

The majority of carbon dioxide is transported as part of the bicarbonate system.

Goodluck

Answer:

c. A at the top of the saturated zone.

Answer:

I think that's it or u can research more on it

Answer:

B

Explanation:

Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected.

Answer: B. One organism benefits and the other is not affected

Answer:

d. all of the above

Explanation:

tigers and zebras both have activities that they're limited to by each species. But both of them do all that was listed, and running, breathing and digesting all take the body's energy to do.

Answer:

D

Explanation:

they both need the energy to do that

Answer:

Mutational effects can be beneficial, harmful, or neutral, depending on their context or location. Most non-neutral mutations are deleterious. In general, the more base pairs that are affected by a mutation, the larger the effect of the mutation, and the larger the mutation's probability of being deleterious.

Explanation:

Answer:

It depends, not all mutations are bad.

Explanation:

Some mutations don't affect anything and remain coding for the same gene so it ends up being the same even if it wasn't mutated in the first place.

Answer:

Advanced forms of life existed on earth at least 3.55 billion years ago. In rocks of that age, fossilized imprints have been found of bacteria that look uncannily like cyanobacteria, the most highly evolved photosynthetic organisms present in the world today. Carbon deposits enriched in the lighter carbon-12 isotope over the heavier carbon-13 isotope-a sign of biological carbon assimilation-attest to an even older age. On the other hand, it is believed that our young planet, still in the throes of volcanic eruptions and battered by falling comets and asteroids, remained inhospitable to life for about half a billion years after its birth, together with the rest of the solar system, some 4.55 billion years ago. This leaves a window of perhaps 200-300 million years for the appearance of life on earth.

divine interventionThis duration was once considered too short for the emergence of something as complex as a living cell. Hence suggestions were made that germs of life may have come to earth from outer space with cometary dust or even, as proposed by Francis Crick of DNA double-helix fame, on a spaceship sent out by some distant civilization. No evidence in support of these proposals has yet been obtained. Meanwhile the reason for making them has largely disappeared. It is now generally agreed that if life arose spontaneously by natural processes-a necessary assumption if we wish to remain within the realm of science-it must have arisen fairly quickly, more in a matter of millennia or centuries, perhaps even less, than in millions of years. Even if life came from elsewhere, we would still have to account for its first development. Thus we might as well assume that life started on earth.

How this momentous event happened is still highly conjectural, though no longer purely speculative. The clues come from the earth, from outer space, from laboratory experiments, and, especially, from life itself. The history of life on earth is written in the cells and molecules of existing organisms. Thanks to the advances of cell biology, biochemistry and molecular biology, scientists are becoming increasingly adept at reading the text.

An important rule in this exercise is to reconstruct the earliest events in life's history without assuming they proceeded with the benefit of foresight. Every step must be accounted for in terms of antecedent and concomitant events. Each must stand on its own and cannot be viewed as a preparation for things to come. Any hint of teleology must be avoided.

Answer:

3:1

Explanation:

To find out the phenotypic ratio, we need to do a Punnet Square.

We know that R and I are the dominant alleles that produce red flowers, and r and i are the recessive traits.

 ║R ║ r

I ║RI║Ir

i ║Ri║ir

The genotype ratio would be 3 because the dominant traits are present three times (RI, Ir, and Ri) and 1 for the recessive trait since it only appears once in the Punnet Square (ir). In conclusion, the phenotypic ratio form the roses are 3:1

Complete question:

Red rose color is produced by either of two genes, R/r and I/i. The dominant alleles of both these genes produce red pigment, and one of these genes is enough to produce a red flower. The recessive alleles are nonfunctional and produce no pigment (remember that no pigment = white.

a. Given the allele combinations below, state the phenotype and expected ratio (as a fraction that would result from a cross of two dibybrid roses. (Ex: A B : Green 9/16)

R-I-

rrI-

R-ii

rrii

b. What is the overall phenotypic ratio from the cross above? (Ex black: 3 yellow : 1 green)

c. What type of epistasis is this? (Note there is a word bank below) Dominant epistasis, Dominant suppression, Duplicate gene action, Recessive epistasis, Complementary gene action No Epistasis

Answer:

Explanation:

Available data:

                      Recessive allele r

                     Recessive allele i

a. Given the allele combinations below, state the phenotype and expected ratio (as a fraction) that would result from a cross of two dibybrid roses.

R-I-

rrI-

R-ii

rrii

Cross: Two dihybrids

Parentals) Rr Ii    x     Rr Ii

Gametes) RI, Ri, rI, ri

                RI, Ri, rI, ri

Punnett square)    RI           Ri             rI             ri

                     RI    RRII       RRIi        RrII           RrIi

                     Ri    RRIi        RRii        RrIi          Rrii

                     rI     RrII        RrIi           rrII          rrIi

                     ri     RrIi         Rrii          rrIi           rrii

F1) 9/16 individuals are expected to be red R-I-

    3/16 individuals are expected to be red R-ii

    3/16 individuals are expected to be red rrI-

    1/16 individual is expected to be white rrii

b. What is the overall phenotypic ratio from the cross above? (Ex black: 3 yellow : 1 green)

Red individuals 15/16

White individual 1/16

Phenotypic ratio → 15:1

c. What type of epistasis is this? Dominant epistasis, Dominant suppression, Duplicate gene action, Recessive epistasis, Complementary gene action No Epistasis

Duplicate gene action. There are two genes involved in the expression of a phenotype, and the presence of at least one dominant allele is enough to produce the dominant phenotype (in this case, red color). The phenotypic ratio of this interaction is always 15:1. This is an example of dominant duplicate genes.

Answer:

liquids are hydrophobic

A

Answer:

a

Explanation:

Answer:

atom - molecule- Cell -tissue - organism- population- ecosystem-biosphere

Answer:

sharks cannot eat animals ..... shark can eat mamals and fishes

Explanation:

Answer:

Aristotle

Explanation:

Aristotle was the first

Answer:

Aristotle

Explanation:

Aristotle was the first to classify living things..

Answer:

In many ways, meiosis is a lot like mitosis. The cell goes through similar stages and uses similar strategies to organize and separate chromosomes. In meiosis, however, the cell has a more complex task. It still needs to separate sister chromatids (the two halves of a duplicated chromosome), as in mitosis. But it must also separate homologous chromosomes, the similar but nonidentical chromosome pairs an organism receives from its two parents.

These goals are accomplished in meiosis using a two-step division process. Homologue pairs separate during a first round of cell division, called meiosis I. Sister chromatids separate during a second round, called meiosis II.

Since cell division occurs twice during meiosis, one starting cell can produce four gametes (eggs or sperm). In each round of division, cells go through four stages: prophase, metaphase, anaphase, and telophase.

Answer:

In the water cycle, evaporation occurs when sunlight warms the surface of the water. The heat from the sun makes the water molecules move faster and faster, until they move so fast they escape as a gas. ... When it is cool enough, the water vapor condenses and returns to liquid water.

Answer:

- Typically begins about 20 minutes after stage 1: Stage 3

- Alpha waves dominate: Stage 1

- Sleep spindles occur: Stage 2

- Light sleep: Stage 2

- Vital signs are at their lowest levels: Stage 4

- Delta waves dominate: Stage 4

- Feeling a drifting sensation: Stage 1

- Beginning of decline in respiration and blood pressure: Stage 2  

Explanation:

Sleep can be divided into two phases: 1-non-rapid eye movement (NREM) sleep and 2-rapid eye movement (REM) sleep. In turn, NREM sleep is divided into four stages (1 to 4). Stages 1-2 are referred to as “light sleep”, while stages 3-4 are known as “deep sleep”. The first NREM stage (normal length: 5-10 minutes) is the transition between wakefulness and sleep. During this stage, the brain produces high amplitude theta waves. During the second NREM stage (light sleep, 10-25 minutes), the body temperature drops, muscles are in a more relaxed state, the breathing and heart rate also drop. The third NREM stage (20-40 minutes) involves the emergence of delta waves and muscles are entirely relaxed. This period (stage 3) is a period of deep sleep, which is referred to as slow-wave sleep (SWS). Finally, the fourth NREM stage (10-60 minutes) is characterized by high amplitude delta waves, while heart and respiration rates slow dramatically.

Data are fundamental in Life/Natural Science because they can help us to answer hypotheses.​

A hypothesis is a given explanation about a phenomenon observed from a question from the real world.

In conclusion, data are fundamental in Life/Natural Science because they can help us to answer hypotheses.​

Learn more about the hypothesis here:

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Answer: synthesizing of complex molecules

Explanation:

During the synthesizing of complex substances (catabolism) energy is given off to the body to generate heat within the body

Answer:

c. Parabasilids

Explanation:

Termites are unable to digest cellulose and lignin by themselves. They need microorganisms living in their guts to provide the necessary enzymes to break down these molecules. This relationship turns to be mutualistic, in which both organisms are beneficiated. The microorganism is an endosymbiont.

Parabasilids are unicellular flagellated protists, most of them symbionts with animals. Flagella are characteristics of this group, arranging into one or more groups in the anterior region of the cell. Many species are commonly found in the digestive tube of termites. Parabasilids help their hosts to digest cellulose through enzymatic action. They are anaerobic organisms and lack mitochondria, making them capable of living in an environment with no fresh supply of oxygen O₂. Termites gut provide all the necessary conditions for endosymbiont´s growth, reproduction, and development.

The Protista group that is more likely to be found in a termite gut is Parabasilids (Option C).

In conclusion, the Protista group that is more likely to be found in a termite gut is Parabasilids (Option C).

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Answer:

Every body on earth attracts every other body. with a force. which is directly proportional to product of their masses and inversely proportional to square of distance between them.

Answer:

I think it's probably 2,3, and 4 :))

Answer:

renewable resources can be replenished.

most renewable resources are easily available in nature.

all renewable resources are cost effective.

Answer:

The luminosity function

In astronomy, the luminosity function gives the number of stars or galaxies per luminosity interval. ... Luminosity functions are used to study the properties of large groups or classes of objects, such as the stars in clusters or the galaxies in the Local Group.

Answer:

Explanation:

1) The mitochondrion : is an organelle that makes energy available to the cell. They use energy from organic compounds (such as glucose) to make molecules of ATP (adenosine triphosphate).

2) Ribosomes: are small structures where proteins are made. Both subunits consist of proteins and RNA. RNA from the nucleus carries the genetic code, copied from DNA, which remains in the nucleus. At the ribosome, the genetic code in RNA is used to assemble and join together amino acids to make proteins. Ribosomes can be found alone or in groups within the cytoplasm, as well as on the RER.

3) Cytoskeleton: is the “frame” of the cell, keeping structures in place, providing support, and giving the cell a definite shape.The cytoskeleton organizes the cell and keeps the cell’s organelles in place, but it also aids in the movement of organelles throughout the cell.

Answer:

The sharing of common ancestors