BIOLOGY HIGH SCHOOL

Which molecules of the adaptive defense system provide humoral immunity by circulating freely in the blood and lymph, where they bind to extracellular antigens and inactivate them and mark them for destruction? A) antibodies
B) complement
C) proteins
D) antigens
E) interferons

Answers

Answer 1
Answer: A) antibodies is the answer.
Answer 2
Answer: V. OI Megan snn IN shnxh in dvnn in sh in us. Fb

Related Questions

Which of the following are factors that both unicellular and multicellular organisms actively balance in order to achieve homeostasis?A)size, shape, and massB)texture, density, and flexibilityC)wastes, nutrients, and waterD)sound, light, and temperatureCan any one explain this one for me
Which statement best describes an independent variable? A-The variable that responds to change in a investigation B- The variable you can change in an investigation C- The effect in a cause/effect relationship D- The factor that can never change in an investigation
Sustainability means developing practices which protect the environment while also providing for human needs. Which of the following changes would be most helpful in achieving sustainable agriculture? A)Clearing land for agriculture by cutting down trees instead of burning them B)Rotating crops to replenish the soil with nutrients C)Tilling the ground to remove weeds and create uniform crops D)Growing crops that produce only renewable resources
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Bright-field microscopes are used for most microscopic work. True or false?

Answers

Answer:

The correct answer will be option-true

Explanation:

A bright-field microscope is an optical instrument widely used by students and researchers all over the world.

The bright-field microscope is a compound light microscope which uses the light to see the samples. In the microscope the samples appear darker in color on the bright or light-coloured background.  This enables the viewer to clearly see the sample in the microscope.

Thus, true is the correct answer.
true, Bright-field microscopes are used for most microscopic work.

All of the following are functions of human skin, except A. absorbing mineral reserves, water, and waste. B. releasing excess heat to regulate body temperature. C. protecting the skin from pathogens. D. gathering information about the environment.

Answers

D.gathering information about the environment 

Which is the result of breeding individuals of different parentage?genetic disease
hybrid vigor
genetic engineering
natural selection

Answers

the answer its hybrid vigor

the answer is B. on ed2020

Use sperm and egg in the same sentence.

Answers

When a sperm fertilizes an egg, a baby is starting to begin its journey developing as a child

What drives the flow of water through the xylem? Question 4 options: passive transport by the endodermis active transport by tracheid and vessel elements the evaporation of water from the leaves the number of companion cells in the phloem

Answers

Xylem

Explanation:

The flow of water through the xylem is driven by the evaporation of water from the leaves

  • The xylem of a plant is the system of tubes and transport cells that circulates water and dissolved minerals
  • Water flows more efficiently through some parts of the plant than others
  • Water absorbed by roots must cross several cell layers before entering the specialized water transport tissue referred to as xylem
  • These cell layers act as a filtration system in the root and have a much greater resistance to water flow than the xylem, where transport occurs in open tubes
  • Once in the xylem tissue, water moves easily over long distances in these open tubes
  • There are two kinds of conducting elements (i.e., transport tubes) found in the xylem: 1) tracheids and 2) vessels
  • Tracheids are smaller than vessels in both diameter and length, and taper at each end, vessels consist of individual cells or vessel elements stacked end-to-end to form continuous open tubes
  • Water movement is passively driven by pressure and chemical potential gradients
  • The bulk of water absorbed and transported through plants is moved by negative pressure generated by the evaporation of water from the leaves (transpiration)

Describe how the parts of a cell are like a city or town. Identify what parts of a town are similar to cell organelles.

Answers

The nucleus is the control centre of the cell so the town hall or the police station might work.
The cell wall could relate to the outer limits of a city, or even a city wall.
Ribosomes are similar to small factories.
As for The lysosome, A landfill site or dump could work here.
A vacuole is where the cell stores sap. A warehouse in particular a food storage warehouse would be a good comparison.
The chloroplast would be close to A food production factory or a farm.
For The cell membrane, you could use Immigration control at the city airport..
The endoplasmic reticulum basically compares to a factory.
Mitochondria are the powerhouses of the cell, aka a power station.
Finally the golgi body is where proteins are modified and distributed. Some kind of distribution centre where goods are sent to shops would work


the nucleus is the like the president and the cell membrane is like the army, and the Golgi bodies are like the highways and interstates that are built for us to drive, and the ribosomes are the people of the city
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