Which stage comes first in the process of embryonic development

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Answer 1

Answer: What is cell division during the first stage of embryonic development called? ... The blastula turns into the gastrula through a process known as gastrulation.

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Diffusion can be defined as active transport of particles up a concentration gradient.movement through a cell membrane using energy from ATPmovement of particles from a region of high concentration to a reaigon of low conentrationmovement of particles from a region of low concentration to a regoin or to a high region
A comet is a A. meteoroid that travels through Earth’s atmosphere and hits the surface. B. meteoroid that burns up in Earth’s atmosphere, producing a streak of light. C. small, rocky object that orbits the Sun and is usually found in a belt between the orbits of Mars and Jupiter. D. small object made of ice and dust that orbits the Sun and forms a coma as it approaches the Sun.
What type of mutation is the following: ATCGAC to TTCGACa)pointb)insertionc) deletion
What is required for the production of anterior pituitary gland hormones?a. neural stimuli (from the sympathetic division of the ANS) b. hormonal stimuli c. all of these d. humoral stimuli
Which of the following scenarios is representative of parasitism?a. Tapeworms living in a mammal’s intestinal tract b. Remora fish attaching themselves to sharks c. Birds feeding on insects stirred up by grazing animals d. Birds eating scraps of food from a crocodile’s teeth

The Earth is a unique planet in that it is covered by more than 70 percent water. There are several properties of water that make Earth a suitable environment for life, including how the density of solid water (ice) is about nine percent less than the density of liquid water. Which best explains why this feature of water is important for marine life?Ice forms from the bottom of the water column up, allowing organisms to freeze and enter hibernation.

Ice forms from the top of the water column down, creating a protective barrier over the liquid water.

The higher-density liquid water shelters organisms from cold air better than the less-dense ice.

The higher-density liquid water traps nutrients for primary producers better than the less-dense ice.

Answers

Answer:

The higher-density liquid water shelters organisms from cold air better than the less-dense ice.

Explanation:

Because of this difference in density, the waters of lakes and seas do not freeze completely because a less dense ice layer forms on the surface and creates a natural thermal insulator that makes the water below it remain in the liquid phase. This saves the animal and plant life of lakes and seas.

Ice works as a thermal insulator because its specific heat (2.03 J/g. ºC) is lower than that of water (4.18 J/g. ºC).

After the cold is over and the hot season comes, the surface ice melts easily. But that would not happen if the ice dropped to the bottom of lakes and seas. With this, the animal and plant life would be compromised.

Another important point is that, as already mentioned, liquid water reaches its maximum density at approximately 4ºC, which is 1,000 g/cm3. Therefore, during times such as spring and fall, the water reaches temperatures near this and becomes denser than the rest, going to the bottom. This causes a vertical movement called the convection current, which is responsible for mixing the nutrients dissolved in water.

The higher-density liquid water shelters organisms from cold air better than the less-dense ice.

Enlarged roots and stems in plants are adaptations for _________________ and are often found in _______________ plants that must endure winter.

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Enlarged roots and stems are found in plants that need to adapt for food storage in winter months. These types of plants lose their leaves during the winter months and cannot participate in photosynthesis, so the extra food storage helps them to survive.
The category of plants that lose their leaves are called deciduous plants.

food storage; deciduous.

What are the number of vertebrae in each section of the vertebral column

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Answer: the vertebral column is made up of 5 sections of individual bones. There are 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 1 sacral bone and the coccyx

Explanation: .

CAN SOMEONE HELP ME PLEASE Nerve cells called _______________ form networks within the body (like a system of wires), in order to communicate with each other in a type of chain reaction.Neurons

Myofibrils

Sarcomeres

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Neuron is the correct answer. They form a network that is connected to the brain through the spinal cord. This results in an impulse which allows you to do whatever it is you have to do.

Which best describes the nature of cellular respiration?

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Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products.

Hope this helps...

it occurs in every body cell.

Most scientists maintain that the release of carbon gases from industries leads to which ecological crisis?

Answers

Answer: Global warming

Explanation:

Global warming can be defined as the phenomenon in which there is an increase in the global temperature of the world.

This is because there is an increase in the carbon dioxide concentration in the environment.

The increase in the overall carbon dioxide absorbs more heat which tends to increase the temperature of earth.

Scientists maintain that the release of carbon gas from industry is contributing to global warming.

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Describe the trend for mushroom yield as the concentration of heavy metals in the soil is increased.

What happens to E. coli when lactose is not present? a. The enzymes needed to break down lactose are continually produced. b. The genes that produce the enzymes needed to break down lactose are not expressed. c. E. coli is not able to survive without lactose. d. The genes required to produce the enzymes that break down lactose are destroyed.