Plz answer this question: Read the passage and examine the photos. Then, suggest two reasons that scientists think developing pollen grains made vascular plants the most successful plants that live on land.

Answer:

D

Explanation:

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Answer:

Without rain, there would more than likely be no collection of water for animals to drink such as ponds, lakes, rivers, etc. Rain, in addition to providing these animals with water to drink, also provides them with their natural habitats such as fish, mosquitoes, and other water creatures. Without rain, animals would merely perish, and soon, humans would as well.

Explanation:

Answer: The steps used in scientific methods are to ask a question, form a hypothesis, test the hypothesis, analyze the results, draw conclusions, and communicate results. A controlled experiment tests only one factor at a time so that scientists can determine the effects of changes to just that one factor.

Answer:

The scientific method is the gold standard for exploring our natural world. You might have learned about it in school, but here’s a quick reminder: It’s the process that scientists use to understand everything from animal behavior to the forces that shape our planet—including climate change.

because it's overall final fee energy value is less than it's initial, meaning that it has a negative free energy amount. therefore, there is a net release of energy in cellular respiration, so we know it releases more energy than it invests into the bonds of its products.

Answer:

Generally, color alone is not the best tool in identification because color can be highly variable. Some minerals can occur in a variety of different colors due to impurities in the chemical makeup of the mineral.

Explanation: Hope that's what your looking for.

Answer:

there is no significant difference in nutrients between brown and white eggs.

Answer:

Disease

Propatogenic

Cell

include

Answer:epithelial

Explanation:

Answer:

D

Explanation:

Actually fat is the best source of energy, since it is time consuming to break down a molecule of fat, carbohydrate is now used as an alternative to that since the molecules are broken down quicker.

Answer:

Carrying capacity, or the greatest number of people that an environment can support over time without harming or degrading it, is controlled by a few basic factors: food supply, water availability, and space. Carrying capacity, or the greatest number of people that an environment can support over time without harming or degrading it, is controlled by a few basic factors: food supply, water availability, and space.

Explanation:

Answer: Sumerians

Explanation: www.whodiscoveredit.com/who-discovered-mercury.html  

Answer:

Galileo Galilei first discovered mercury my source https://www.nhm.ac.uk/discover/planet-mercury.html#:~:text=Mercury%20is%20one%20of%20the,Galileo%20Galilei%20and%20Thomas%20Harriot.    that link

Explanation:

Hope di helps

Answer:

B. Nutrients

Explanation:

Xylem transports water upwards through the stem from the soil

Dissolved in this water are nutrients such as nitrates which are vital for plants

Answer: See explanation

Explanation: High biodiversity help the ecosystem have better stability becuase if a diease affect a certain type of plant, and the ecosystem has high biodiversity only that species will die and the others will live on. But if it has low bio diversity the organism might die out completely.

Blood must travel through capillaries at a slow rate to assist with diffusion of fluid into the interstitial space.

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Wildlife species are defined as undomesticated animal, plant, or organism that grows in the wild and are not introduced to humans. The species that can be used by the state resource agencies are large mammals, small mammals, birds of prey, and waterfowl.

The animals that can be hunted legally must be:

Also, some species labeled as endangered must be protected by law. These species are on the verge of getting extinct and are present in the least numbers to harvest.

Thus, the state agencies may use large mammals, small mammals, and waterfowl.

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Answer:

Haploid

Explanation:

Answer:

C. 23

Explanation:

In humans (2n = 46), who have 23 pairs of chromosomes, the number of chromosomes is reduced by half at the end of meiosis I (n = 23).

Answer: SARS is not a common virus,  it is a viral respiratory illness that was recognized as a global threat. it is spread through close contact. Although it is a very serious illness, it is rare to get. only eight persons were laboratory-confirmed as SARS cases.

Explanation:

Answer:

Yes you are correct

Explanation:

The toll-like receptors do NOT directly lyse bound pathogens (Option C). These protein receptors play fundamental roles in the innate immune system.

Toll-like receptors (TLRs) are single-pass membrane-spanning protein receptors that play fundamental functions in the innate immune system.

TLRs are differentially expressed on the surface of antigen-presenting cells (i.e., macrophages and dendritic cells) in order to recognize evolutionary conserved antigenic domains in different pathogenic microorganisms (e.g. bacteria).

TLRs initiate innate immune responses such as, for example, inflammatory responses, by identifying conserved pathogen-associated molecule patterns (PAMPs).

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Answer:

In skeletal muscles with low glycogen, glucose will be stored as muscles glycogen.

Skeletal muscles are unable to release glucose because muscles lack glucose 6 phosphatase. Also, muscles glycogen is mainly a local energy substrate for exercise, rather than an energy source to maintain glucose concentration during fasting.

Answer:

Answer: Maintain body homeostasis with electrical signals.

Explanation:

Your nervous system is your body's command center. Originating from your brain, it controls your movements, thoughts and automatic responses to the world around you. It also controls other body systems and processes, such as digestion, breathing.

The amount of energy transferred to frog   is 10% of the energy contained in grasshopper.

This is a representation of energy levels and distribution in a food chain in an Ecosystem. When a group of organism  represent the same level in a food chain, in an ecosystem ,this is trophic level. Food chain represent a linear representation of nutrients and  therefore energy distributions in an ecosystem.

Basically, in an ecosystem, there is always reduction in energy transfer from one trophic level to another by 10%. This is because, as the energy is transferred from the producer (green plants) to the primary consumer, the hopper, only 10% of the available energy will pass through to the hopper because 90% of the energy will be used by the green plants for metabolic and other physiologic  activities.  As this is transferred to the next trophic level, the Frog, this will be  reduced (for the same reasons) so that  10% of the energy received by the grasshopper is transferred to the frog.

Practically, if 100,000Kcal of energy was obtained by hopper from the primary producer,10,000kcal(10%) of 100,000 will be transferred to frog.

This 10% occurs at each trophic levels.

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Answer:

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Answer: a) Friction

Explanation: Friction is a force that opposes motion. When two objects are in contact, friction is acts in a direction opposite to the motion of the object.

Answer:

Active Transport

Explanation:

Answer:

Ocean Acidification

Explanation:

The high level of acid in the ocean has caused the shellfishes shell to wear down.

Answer:

purse-seining

Explanation:

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