Evolutionary adaptations that help some animals directly exchange matter between the cells of their body and the environment include _________.
A. a gastrovascular cavity, a two-layered body, and a torpedo-like body shape
B. an external respiratory surface, a small body size, and a two-cell-layered body
C. a large body volume, a long, tubular body, and a set of wings
D. an unbranched internal surface, a small body size, and thick covering

Answer:

Plastids, chloroplasts, and vacuoles are found in plant cells but not in animal cells.

Explanation:

Answer:

At the end of cytokinesis there are two daughter cells with a normal complement of diploid genetic material.

Explanation:

hope this helps you if it does please mark brainiest

Explanation:

During replication, the double stranded helix of DNA is unwinded and unzipped by helicase. Polymerase cannot just start adding nucleotide to the strand so DNA primase synthesizes a short strand of nucleotide called primers, then the enzyme polymerase can now start the additional of free nucleotide. The enzyme polymerase adds free complementary nucleotide to the leading strand in 3' to 5' and the same is done for the lagging strand. The new daughter complementary strand formed on the leading strand is identical to the parent lagging strand and the new daughter complementary strand formed on the lagging strand is identical to the parent leading strand, so a pair of identical daughter double stranded DNA or two identical daughter double stranded DNA are formed.

Answer:

True

Explanation:

Explanation:

Answer:

it is the third sentence

Answer:

A

Explanation:

They protected the resources by creating national parks. In national parks it’s illegal to drill for oil, mine, etc

Answer:

D

Explanation: by limiting their actions they couldn’t do anything

Double fertilization in Gnetophyta (Ephedra and Gnetum) differs from that in angiosperms in a few ways.

First, double fertilization occurs in just one cell in Gnetophyta, the central cell of the embryo sac, while in angiosperms the two sperm cells are transferred to two different cells. Second, the sperm cells in Gnetophyta differ from those in angiosperms in that the first sperm cell is large, while the second sperm cell is much smaller.

Third, the two sperm cells in Gnetophyta are transferred to the same nucleus, while in angiosperms, the two sperm cells are transferred to separate nuclei. Fourth, in Gnetophyta, the two sperm cells do not fuse together to form a triploid endosperm, unlike in angiosperms where the two sperm cells fuse to form a triploid endosperm. Lastly, in Gnetophyta the polar nuclei do not undergo the same type of fusion as they do in angiosperms, thus forming a diploid endosperm.

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Answer:

Patient 2has type B+ blood

Hardwood and softwood refer to the type of tree, not the density of the wood. Hardwood trees are deciduous trees that lose their leaves in the fall, while softwood trees are evergreen trees that retain their leaves year-round. Some hardwoods, such as balsa, are actually softer than some softwoods, such as pine.

Heartwood and sapwood refer to the different layers of wood that make up a tree. Sapwood is the outermost layer of a tree trunk and contains living cells that transport water and nutrients throughout the tree. It is typically lighter in color than heartwood and is more vulnerable to decay and insect damage. Heartwood is the innermost layer of a tree trunk and contains dead cells that provide structural support to the tree. It is typically darker in color than sapwood and is more resistant to decay and insect damage.
Springwood and summerwood refer to the different growth stages of a tree's annual rings. Springwood is the wider, lighter-colored portion of the annual ring that grows early in the growing season when water and nutrients are abundant. Summerwood is the narrower, darker-colored portion of the annual ring that grows later in the season when water and nutrients are more scarce.
Hardwood and softwood refer to the type of tree, not the density of the wood. Hardwood trees are deciduous trees that lose their leaves in the fall, while softwood trees are evergreen trees that retain their leaves year-round. Some hardwoods, such as balsa, are actually softer than some softwoods, such as pine. The terms hardwood and softwood are primarily used to distinguish between the two main types of trees used in construction and woodworking.

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Answer:

Theories can be created by just one person

Explanation:

What normally happens is that one person creates a theory, and as years go by new research comes out further advancing or modifying a theory. The theory then is created by many people. Which overall still means that theories can be created by just one person.

Hemoglobin binds to oxygen in the presence of protons. When the pH in the solution decreases, the hemoglobin's affinity for oxygen reduces. This process is known as the Bohr effect.

The hemoglobin molecule consists of four subunits, each containing an iron atom that binds to an oxygen molecule. The binding of oxygen to hemoglobin is influenced by several factors, including pH. The binding affinity of hemoglobin to oxygen is reduced as the pH of the solution decreases. This process is known as the Bohr effect.The Bohr effect is a phenomenon in which an increase in acidity (decrease in pH) or an increase in carbon dioxide concentration causes a decrease in the affinity of hemoglobin for oxygen. When hemoglobin binds to oxygen in the lungs, the pH is higher, resulting in a stronger bond between hemoglobin and oxygen. In peripheral tissues, where oxygen is needed, metabolic activity produces protons and carbon dioxide, resulting in a decrease in pH. This change in pH results in the release of oxygen from hemoglobin in the tissues, where it is needed for respiration.

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The following factors will decrease the amount of oxygen discharged by hemoglobin to peripheral tissues.

A) decreased temperature

B) increased pH

C) decreased amounts of DPG

D) increased tissue PO2

How oxygen is being transported?

About 97% of the oxygen used during breathing is delivered by red blood cells in the blood, while the remaining 3% dissolves in plasma. The pigment hemoglobin, which is found in RBCs, is what gives blood its red color. According to the partial pressures of oxygen, carbon dioxide, H+ concentration, and temperature, oxygen attaches to hemoglobin to create oxyhemoglobin. Up to 4 oxygen molecules can be carried by a single hemoglobin molecule. The optimum circumstances for the synthesis of oxyhemoglobin include low temperature, high H+ concentration, and oxygen partial pressure. In the alveoli, these criteria are satisfied. But in the tissues, the circumstances are different, and as a result, oxygen is separated from oxyhemoglobin.

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Answer: Meiosis is a phase in sexually reproductive organisms, wherein cell-division takes place. It is of great importance, because it creates genetic diversity in the population.

Explanation:

Answer:

Gymnosperms are....

non-flowering plants, which are in the sub-kingdom of Embophyta.

Explanation:

Cycadophyta

Ginkgophyta

Gnetophyta

Coniferophyta

Albumin is also the most significant contributor to the osmotic pressure of blood; that is, its presence holds water inside the blood vessels and draws water from the tissues, across blood vessel walls, and into the bloodstream.

The statement: in the process of urine formation, filtration takes place in the bladder is FALSE because filtration takes place in the kidneys, not in the bladder.

During urine formation, the kidneys filter blood to remove excess water, salts, and waste products, such as urea and creatinine. This process, known as filtration, occurs in the renal corpuscles of the nephrons, which are the functional units of the kidney.

The filtered fluid, called glomerular filtrate, then enters the renal tubules, where various processes take place to modify the composition of the urine. These processes include reabsorption, secretion, and excretion.

The urine produced by the kidneys then travels down the ureters and is stored in the bladder until it is eliminated from the body through the urethra. The bladder's main function is to store urine temporarily until it is expelled from the body during urination, but it does not play a role in the actual process of urine formation.

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Explanation:

Weaker Immune systems/Compromised Immune systems.

Answer:

virus and bacteria make people sick because virus disrupting cell functions and bacteria cause diseases in some infections like pneumonia and diarrhea  

Explanation:

It will Leave site E open because on In site P, the codon  with A U A at the bottom goes at the place, or it's the one that has three things on top rather than the one circle.

On the other hand In site A the codon with U C C at the bottom goes at the place , and it has just a circle attached to the top. In general, ribosomal subunits gets assemble together and forms a sandwich like structure on the strand of mRNA, from this place they  starts to attract tRNA molecules tethered to amino acids (circles). As a result a long chain of amino acids molecules ger emerged when ribosome starts decoding the mRNA sequence results to polypeptide or new protein.

So , Ribosomes helps to provide the scaffolding structure on tRNAs that interact with mRNA during translation of an mRNA sequence to the amino acid chain .

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Answer:

This question is incomplete  

Explanation:

This question is incomplete but there are some general facts that can be made.

Firstly, mitosis only occurs in meristematic tissue of plants which includes apical and lateral meristems

There are 4 phases in a cell cycle

1) G1 (gap 1) phase: This is the first phase of the cell cycle that has to do with an increase in the size of the cell. Major cellular components duplicate in size here.

2) S-phase: DNA replication occurs here.

3) G2 (gap 2) phase: This is the gap phase that comes after the S-phase. The cell undergoes further growth here and the organelles of the cells are also prepared for cell division.

4) Mitotic phase: There are four stages here

i) prophase: Chromosome condenses and becomes visible at this stage. And there is the emergence of spindle fibre from centrosomes.

ii) metaphase: Spindle fibre develops and sister chromatids are attached to

separate spindle.

iii) anaphase: Cohesin, which holds two sister chromatids (of chromosomes) together, breaks down and are pulled towards opposite poles.

iv) telophase: Chromosomes begins to decondense at opposite poles and actual cell division starts as mitotic spindle breaks down.

NOTE: All possible answers to the question are underlined

Current models regarding the dispersal of modern humans indicate that the earliest modern humans emerged from Africa and dispersed across the globe, eventually replacing all other hominin populations.

This event, known as the Out of Africa migration, occurred around 60,000 years ago. Modern humans likely first migrated out of Africa into the Middle East, then moved into Asia and Europe, and finally reached Australia and the Americas. This is supported by genetic, archaeological, and fossil evidence.

Additionally, some researchers believe that there were multiple waves of migration out of Africa, with different groups taking different routes and settling in different regions.

This theory challenges the previously accepted belief that modern humans evolved independently in multiple regions of the world. Instead, it suggests that all modern humans share a common African ancestry.

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The correct answer is Genetic information is stored in the nucleus as DNA molecules.

The nucleus is a membrane-enclosed organelle, determined in maximum eukaryotic cells, which shops the genetic material (DNA). Most DNA is placed withinside the cellular nucleus (in which it's far known as nuclear DNA), however, a small quantity of DNA also can be determined withinside the mitochondria (in which it's far known as mitochondrial DNA or mtDNA).

The genetic information saved in an organism's DNA consists of the commands for all of the proteins the organism will ever synthesize. In eukaryotes, DNA is contained withinside the nucleus. A DNA Molecule Consists of Two Complementary Chains of Nucleotides. The Structure of DNA Provides a Mechanism for Heredity.

Thus it is clear that Genetic information is stored in the nucleus as DNA molecules.

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Answer: nucleus as DNA molecules.

Explanation: I took the test

To figure out which is the catalyst, create three test tubes and add the unknown compounds X, Y, and Z to each one. The reaction that produces C significantly faster than the original reaction A + B ⇒ C will be the catalyst.

A catalyst is any substance that accelerates the rate of a reaction without being consumed.

Therefore, to identify which unknown substance is a catalyst, the following experiment can be done:

Therefore, the test tube that stops producing bubbles first, contains the catalyst.

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Answer:

The fourth plant that receives pure water is the control group.

Explanation:

The election of a control group is essential in an experiment. Its principal purpose is to allow the discrimination of the results obtained by the treatment in the study, in this case, the different concentrations of salty water that each plant receives. The control group provides a reference point. It must be selected from the same population of the treatment groups. Both groups must be similar in every variable that might influence the results, except for the study treatment.

Water molecule is the source of the oxygen that is released as a byproduct of photosynthesis.

The light reactions capture the energy of the light and use it to drive electron exchanges. Despite some using infrared light, the majority of photosynthesis-producing species use visible light. Products of these reactions include decreased nicotinamide adenine dinucleotide phosphate and adenosine triphosphate (ATP) (NADPH).

During the process of photosynthesis, cells use carbon dioxide and energy from the sun to make sugar molecules and oxygen. These sugar molecules are basis for more complex molecules made by the photosynthesis cell .

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Answer:

it is made up of a double layer of hospholipase that separates the cell from the outside world

Explanation:

Answer:

Secondary succession

Explanation:

When a previously occupied area gets colonized by a new dominant group of species or communities, this is known as secondary succession. In secondary succession, new residents take the place of earlier groups in a habitat that has been affected by an ecological disturbance.

Answer: 25%

Explanation:

There would be a 75% chance of the dogs producing a grey pup, meaning there would be a 25% chance of the dogs producing a white pup.  

Otoliths and the cupula provide crucial information to the vestibular nerve about head position and movement, helping the brain maintain balance and spatial orientation.

The otoliths are small, calcium carbonate crystals located in the utricle and saccule of the inner ear. As the head moves, the otoliths shift, causing the gelatinous material they are embedded in to move as well. This movement is detected by hair cells located within the gelatinous material, which then send signals to the vestibular nerve indicating the direction and speed of head movement.

The cupula, on the other hand, is a gelatinous structure located within the semicircular canals of the inner ear. When the head moves, the fluid in the canals moves as well, causing the cupula to bend and stimulate the hair cells within. This bending provides information to the vestibular nerve about the direction and speed of rotational head movement.

Together, these structures allow the vestibular system to detect changes in head position and movement and provide important information to the brain about spatial orientation and balance.

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