Which of the following statements about cells is true?

Answer:

Dissolved or gaseous substances have to pass through the cell membrane to get into or out of a cell. Diffusion is one of the processes that allows this to happen. Diffusion occurs when particles spread.

Explanation:

To enter or exit a cell, dissolved or gaseous substances must pass through the cell membrane. One of the mechanisms that makes this possible is diffusion. Particles diffuse when they spread.

Cell is defined as the fundamental membrane-bound entity that houses the essential molecules of life and is the building block of all living things.

It can also be defined as a semipermeable cell membrane encloses one or more nuclei, cytoplasm, and different organelles, which are the smallest structural component of an organism capable of autonomous functioning.

There are basically two types of cell.

Cell membrane is defined as a biological membrane that keeps all cells' interiors isolated from the outer world and provides protection for it.\

Barriers and gatekeepers are cell membranes. Because of their semi-permeability, some molecules can diffuse across the lipid bilayer but not others.

Thus, to enter or exit a cell, dissolved or gaseous substances must pass through the cell membrane. One of the mechanisms that makes this possible is diffusion. Particles diffuse when they spread.

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Tay-Sachs disease is caused by mutations in the HEXA gene and inheritance is autosomal recessive . The HEXA gene gives the body instructions to make part of the beta-hexosaminidase A enzyme, which is needed to break down a substance called GM2 ganglioside.

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Answer:

Frameshift mutation

Explanation:

A frameshift mutation is a genetic mutation caused by insertions or deletions that shift the whole sequence.

Soil covers the surface of the Earth and is a valuable ecosystem. Soil is made up of minerals, nutrients, water, air, organic matter and microorganisms. Because of its makeup, soil has a variety of uses in a variety of industries.

Agriculture

Soil has vital nutrients for plants. As a result, it is used in agriculture to nourish plants. The roots of a plant receive nutrients from the soil to help it grow. The North Carolina Department of Agriculture and Consumer Services notes that 13 essential plant nutrients come from the soil.

Building

Soil is an important part of the building process. Soil compaction, which increases the density of the soil, is done as part of the building process. The purpose of the compaction is to improve the load support. If not done, structural failure can result. Soil can also be used as building materials such as adobe and red bricks.

Pottery

Clay soil is used in making ceramics, or pottery. When water is added to clay soil, it can be used to create the ceramics. Once formed, you can leave it to dry and it will retain its shape. Any type of ceramic can be created with the clay soil, such as a vase, bowl, cup or sculpture.

Medicine

Soil is commonly used in antibiotics. Microbes created in the soil are harmful to bacteria, which is why soil is used in medicine. Medicines created by soil include skin ointments, tuberculosis drugs and anti-tumor drugs.

Beauty Products

Some beauty products are made with soil. Commonly used beauty products where used soil is used in the production include blush and foundation. Soil rich in clay can also be used in facial masks and toothpastes.

The main function of the soil is to serve as a seat, facilitate the permeability and circulation of water and air, being important for plant life.

It is the layer that covers the most superficial part of the planet and it is where plants grow and animals live.

It supplies water, air, and nutrients to plants, provides food, energy, raw materials, and natural traits.

It intervenes in the regulation of infiltration, storage and flow of surface and subsurface water and its quality.

Filtering, pH buffering, retention of hazardous waste compounds and polluting discharges, etc.

Reserve of genes of animals and plants essential for the maintenance of biodiversity.

Sink of greenhouse gases and effects on the global energy balance and the global hydrological cycle.

Therefore, we can conclude that soils acts as a filter, buffer medium and storage of water, air, nutrients and chemical products or discharges.

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Answer:

The answer is A

Explanation:

All the the different limbs all have an upper arm bone which is the humerus and two forearm bones which are the ulna and the radius.

The limbs of Whales, horses, birds, cats, and humans provide evidence of common ancestry because they have the same basic structure. Thus, the correct option for this question is A.

A common ancestor may be defined as an ancestral organism that is significantly shared by two or more descendent lineages. In a more simple term, an ancestor that they have in common. These ancestors follow each taxon's lineage back in time until all the lineages meet up.

A Common Ancestor is a lineage that undergoes cladogenesis, that is, branching evolution, such that more than one species can trace its ancestry back to the common ancestor or, more accurately, to multiple common ancestors.

Therefore, the limbs of Whales, horses, birds, cats, and humans provide evidence of common ancestry because they have the same basic structure. Thus, the correct option for this question is A.

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Answer:

B

Explanation:

Answer:

B. That it will be the allele that will be shown in the offspring

Explanation:

If something is dominant, that means it's stronger or more assertive. Think of an alpha wolf. It is dominant and is more assertive over its pack. The same is true for alleles (in most cases)

Answer:

DNA

particular protein

polypeptide

Answer:

thank me later

Explanation:

Answer:

A. Vaccines

Explanation:

These are meant to prepare the body for the possibility of infection by building up immunity.

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Answer:

chromosomes are made up of a DNA protein complex called chromatin that is organized into subunits called nuclesomes...

Answer:

Explanation:

Gas exchange

When a plant is carrying out photosynthesis carbon dioxide needs to move from the air into the leaf. It does this by diffusing through small pores called stomata. At the same time oxygen moves out of the leaf through the stomata. This movement of gases in opposite directions is called gas exchange.

The classification of living things includes 7 levels: kingdom, phylum, classes, order, families, genus, and species. Characteristics such as appearance, reproduction, mobility, and functionality are just a few ways in which living organisms are grouped together. These specialized groups are collectively called the classification of living things.

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Answer:

What are the three species?

Answer:

Hydra carry out budding (reproduce asexually)

Plants carry out asexual reproduction

Animals carry out sexual reproduction

Explanation:

Answer:

b

Explanation:

Answer:

1: G to C

2: C to G

3: T to A

4: G to C

5: T to A

Explanation:

look at number 1 and number 4, they have the same box. Along with 3 and 4 they have the same arrow.

Answer:

as it settles deeper underwater ph tends to be higher and a sea urchin tends to be more resilient to change

Acidic seawater, at current pH levels found in the world's oceans, can have a negative impact on sea urchin larval development so it is taken to test the effect of changes in pH.

Sea urchins are spiny, globular echinoderms of the Echinoidea class. The urchins were able to compensate for internal pH in modest acidification (pH 7.8) and not in higher acidification (pH 7.6).

The pH of coelomic fluid was lower at higher temperatures.

Thus, due to this, the sea urchin was chosen to test the effect of changes in pH.

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Answer:

Both parents were heterozygous for black fur.

Answer:

46

Explanation:

The skin cells with 46 chromosomes will each produce daughter cells with 46 chromosomes after they complete the cell cycle.

The skin cell is a vegetative cell that can only divide through mitosis. Mitosis is also referred to as equational division during which a cell produces two daughter cells that are both genetically and phenotypically similar to the parent cell.

During the cell division, at the anaphase stage to be precise, the chromosomes are separated into sister chromatids and sister chromatids of the same chromosomes move in the opposite direction to the poles of the cell before the cytoplasm of the mother cell divides to produce two independent daughter cells. Each chromatid in the new daughter cells then goes ahead to become a complete chromosome with two sister chromatids.

Hence, at the end of the cycle, each daughter cell ends up having the same 46 chromosomes as the parent cells.

Explanation:

Frog undergoes a complete metamorphosis. It includes the egg, tadpole, froglet and then adult frog stages. In complete metamorphosis the hatchling does not resemble the parent and changes as it grows to be an adult.

During metamorphosis the tadpole will develop back legs first, then front legs.  Around 6 weeks of life the mouth starts to widen.  Sometime around 10 weeks the froglet’s, as it is now called, eyes start to bulge out and the tail begins to shrink and eventually disappear.  When the lungs finish developing the froglet makes it’s way onto the land and, Ta-da! It’s a frog!

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Answer:

A

Explanation:

they are nonrenewable meaning they aren't renewable

Answer:

Environmental science is the pursuit of knowledge about the workings of the environment and our interactions with it. Environmentalism is a social movement dedicated to protecting the natural world.

Explanation:

Answer:

When the carbon dioxide concentration goes up, temperature goes up. When the carbon dioxide concentration goes down, temperature goes down

Explanation:

Answer:

False.

Explanation:

The first living organisms were very simple and unicellular.