which is it?

a , b, c, or d?

Answer:

Persistent item c

Answer:

A

Explanation:

Almost all embryos of vertabrites look the same at early embryo stages, even humans to other organisms. This is because they all have a common ancestory, adn orginated from a organism with an embryo that looked like this.

It is clear it cannot be the other answers for the folowing reasons:

The organisms will definatly not look the same, considering they are birds and reptiles. The 2nd answer speaking of geography isnt very accurate, and cannot be determined because as I said above, any vertibrate embro looks very similar, and close geopgraphy isnt what made them look similar.

Again, all vertabrites have the same embryos, and that is a phylum. Not a genus. There are many genus in a phylum, and the ecaxt one cannot be determines.

As I said above, HUMANS look simiar to BIRDS and REPTILES, but clearly grow to be much different.

Answer:

A: the organisms share a common ancestory

These thoughs and facts hopefully answer you question, hope it helps!

Explanation:

Ecologically, mosses break down exposed substrata, releasing nutrients for the use of more complex plants that succeed them. They also aid in soil erosion control by providing surface cover and absorbing water, and they are important in the nutrient and water economy of some vegetation types.

Answer: Humans, of course, are also placental mammals

Explanation:  Placental mammals include such diverse forms. They are also some of the most familiar organisms to us, including pets such as dogs and cats, as well as many farm and work animals, such as sheep, cattle, and horses. Sense they are most familiar to us human beings are also placental mammals.

Answer:

Fission or the act of splitting uranium atoms

Answer:

Nucler fission

Explanation:

Clearly C and D arent correct.

In nuclear fission(A), a uranium atom(mildly radioactive) is split by a nutreon, which realeases nucler energy.

In nucler fussion(B), which only occurs in the sun and stars, two nulcei are combined to make a even bigger nuclei, this does not produce nuclear energy.

Hope this helps :)

Answer:because they are not in the same place

Explanation:

Answer:

Reduction of fossil fuels.

Explanation:

A fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing organic molecules originating in ancient photosynthesis that release energy in combustion. Source: Wikipedia

Answer:

the answer would be a)

Explanation:

Answer:

A, C, D

Explanation:

It is easier to look for which is wrong rather than checking all if they are right.

B is wrong because population A is growing exponentially and it can be inferred from the graph that it is nowhere near slowing down.

Answer:

- Organism A is most likely a herbivore

- Organism B is most likey a carnivore

Explanation:

Based on feeding habit, organisms, usually animals, can be classified into three categories namely: herbivores, carnivores and omnivores.

- Herbivores are those organisms that feed on vegetative matter i.e. plants while carnivores are those organisms that feed on flesh of other animals or organisms. Based on what they feed on, herbivores are adapted to possess blunt teeth (for chewing) like Organism A in this question while carnivores are adapted to possess sharp teeth (for tearing flesh) like Organism B.

Based on the above explanation, organism A is most likely a HERBIVORE while organisms B is most likely a CARNIVORE.

- Another notable point of difference between herbivores and carnivores, which is likely to differentiate organism A and B as well, is that herbivores possess digestive enzyme- amylase in their saliva while carnivores do not. Herbivores need AMYLASE to break down complex carbohydrate (starch) in the plants they feed on.

Answer:

All organisms are composed of one or more cells. Cells come from other cells by division. Cells are the smallest living things. Eukaryotic cells have evolved from prokaryotic cells.

Explanation:

Answer:

The galaxies are moving away from Earth because the fabric of space itself is expanding. While galaxies themselves are on the move — the Andromeda Galaxy and the Milky Way, for example, are on a collision course — there is an overall phenomenon of redshift happening as the universe gets bigger.

Sorry someone flagged this

Answer:

The most likely explanation is that different body parts have different tissues which in turn have different thyroxine receptors. This leads to different signal transduction pathways.

Explanation:

The triiodothyronine absorption through different tissues lead to different signal transduction pathways.

Answer:

It involves inhalation and exhalation of gases. Internal respiration involves gas exchange between the blood and body cells. Cellular respiration involves the conversion of food to energy. Aerobic respiration is a cellular respiration that requires oxygen while anaerobic respiration does not.

Explanation:

Vascular tissues are absent.

-Sex organs are multicellular and jacketed.

-Archegonium is flask shaped with tubular neck and a swollen venter. ...

-Sexual reproduction is of oogamous type. .

-The sporophyte of sporogonium is parasitic over the gametopphyte.

Answer:

Plants occur in damp and shaded areas.

The plant body is thallus like, i.e. prostrate or erect. It is attached to the substratum by rhizoids, which are unicellular or multicellular. They have a root-like, stem-like and leaf-like structure and lack true vegetative structure.

Answer:

Where are the answer choice

Bb    |      bb

Bb    |   bb

The chance of having recessive traits is 50%

The chance of having dominant traits is 50%

Hope this helps ! :)

Answer:

The category of organisms in a water ecosystem that includes the larger,

active swimmers is called Nekton

Explanation:

waves pounding pebbles into smaller and smaller pieces

Answer:

The answer is D :)

Explanation: have a great day and be safe

Answer:

3.2.1 Mitosis - Both A and B

3.2.2 Chromosome - Both A and B

3.2.3 Phases in the cell cycle - Both A and B

3.2.4 Tumor - Both A and B

3.2.5 Bone cancer - B only

Explanation:

1. Mitosis is a process of cell replication , in which one cell divides into two identical daughter cells having the same number of chromosomes. In mitosis, the two new cells are genetically identical. Copies of the chromosome (containing the DNA) are made and distributed equally to each cell. Some organisms such as bacteria reproduce entirely by mitosis.

In cloning, an organism that is genetically identical to another organism is made from that original organism. Cloning can occur naturally or may be done by man artificially. In nature, many organisms produce clones through asexual reproduction for example bacteria produces clones by mitotic binary fission.

Therefore, the phrase mitosis, applies to both A and B.

2. Chromosomes are structures found within the nucleus of cells that contain the genetic material of the organism. The chromosomes are composed two identical structures called chromatids thar are joined together to at a constricted point known as centromere.

During cell division, long fibres extend from the centroiles at the ends of the cell to the centromere of the nucleus in order to pull them apart. These long fibres are known as spindle fibres.

Therefore, the phrase, Chromosome, applies to both A and B

3. The phases in the cell cycle are divided into two major stages : interphase and Mitosis. In interphase, the cell grows and makes a copy of its DNA.

In mitotis, the cell DNA divides into two sets, the cytoplasm divides, forming two new cells.

Thus, phases of cell cycle applies to both A and B

4. Tumours are abnormal growths occurring in any part of the body which may be benign or malignant.

Benign tumours are harmless growth which do not have spread out to other tissues to form various cancers.

Malignant tumors spread out from their point of growth to other tissues leading to cancer in these other tissues and organs.

Therefore, tumors applies to both benign and malignant.

5. Bone cancer refers to abnormal growth of bone cells.

Carcinomas are cancers of the skin and tissue lining of organs.

Leukaemia are cancers affecting the bone marrow, whereby the bone marrow makes abnormal white blood cells, red blood cells and platelets.

Thus, bone cancer only applies to B.

Answer:

Conductors

Explanation: the substances which have a large number of free electrons and offer a low resistance are called conductors

Answer:

3.2.1. A only

3.2.2. A only

3.2.3. A and B

3.2.4. A and B

3.2.5. None

Explanation:

- 3.2.1

Mitosis is a kind of cellular division that produces two genetically identical daughter cells. Whereas, cloning is a technique used to create identical cells. This means that mitosis applies to cloning.

- 3.2.2

A chromatid is a half of a replicated chromosome. Together, a replicated chromosome is called SISTER CHROMATIDS. One of them is called a Chromatid. Spindle fibre is a structure involved with the division of the genetic material during cell division.

- 3.2.3

The cell cycle consists of two stages interphase and mitotic phase. Hence, interphase and mitosis are part of the cell cycle.

- 3.2.4

A tumour is a cancerous mass of cells. Tumour can either be BENIGN i.e. not capable of spreading to other parts or MALIGNANT i.e. capable of spreading to other parts.

- 3.2.5

Cancer is an uncontrolled division of cells and can occur in virtually all organs of the body. Bone cancer is a type of cancer that affects the bone cells. However, carcinoma (starts in the skin) and leukaemia (blood cancer) are unrelated to bone cancer.

Answer:

citric acid cycle

Explanation:

To give just one example, acetyl CoA (mentioned above) that's produced in cellular respiration can be diverted from the citric acid cycle and used to build the lipid cholesterol. Cholesterol forms the backbone of the steroid hormones in our bodies, such as testosterone and estrogens.

Answer:yellow

Explanation:

Hydrogen bicarbonate is an indicator that is use to test the amount of carbondioxide and oxygen in the aquatic body. It's main color is red.

It normally turn to yellow when there is more carbondioxide present in the atmosphere of the water body. It turn yellow when respiration is much because carbondioxide is exhaled out.

Answer:

mm yes tre.........

Explanation:

Answer:

High blood pressure is called hypertension or often referred to as the silent killer as it shows no symptoms at all.

Hope that helps!

Answer:

A

Explanation:

chromosomal mutation definition. A mutation involving a long segment of DNA. These mutations can involve deletions, insertions, or inversions of sections of DNA. In some cases, deleted sections may attach to other chromosomes, disrupting both the chromosomes that loses the DNA and the one that gains it.

Answer:

This process of making sugar and oxygen is called photosynthesis. Pond weed uses the carbon dioxide which is dissolved in the water it is in. The amount of dissolved carbon dioxide can be varied by adding sodium hydrogen carbonate (carbon dioxide solution) to the water.

Explanation:

Answer:

There is no image showing the shape of an enzyme, however, the question can still be answered based on basic understanding. The answers are;

- Less binding of substrate

- won't follow the lock-and-key pattern of enzyme binding

Explanation:

An enzyme is a biological catalyst that regulates the rate of chemical reactions in living systems. Enzymes are proteinous in nature and every protein is made up of an amino acid sequence. The amino acid sequence forms a three-dimensional shape that determines the functionality of the enzyme.

Enzymes catalyze reactions by binding to their substrates in a lock and key pattern. This makes enzymes substrate-specific. If the enzyme's normal shape changes, the following will occur:

- Less binding of substrate

- won't follow the lock-and-key pattern of enzyme binding.

C. It is precipitation that fell on the ground and seeped down to a layer of rock.