Which statement describes how echolocation and ultrasound imaging are the same?

A. They both use the absorption of sound waves.
B. They both use the diffraction of sound waves.
C. They both use the reflection of sound waves.
D. They both use the transmission of sound waves.

Freshwater leeches attach to fish and suck blood from the fish for extended periods of time. This results in sores on the fish that often become infected.

This relationship is best described as .

When discussing evolution, adaptation is *
A. An inherited trait evolved through natural selection
B. A skill that an organism has learned to help them survive
C. An adjustment in the physical appearance or behavior of an organism that happens over a short period of time

How many internal parts or “organelles” are there in a plant cell?

im rewarding brainlist and 47 points too whoever answers this question ;-;

In YOUR OPINION, should the United States try to reduce the amount of nonrenewable resources we use to produce electricity? Why?

Help! With 22! And 21! I’ll give brainliest. ASAP!

The Sun is important in many ways. What is the purpose of the Sun in the food chain? *

Conduction is a method of energy transfer within Earth’s systems. Describe an example of conduction, including where the energy transfer takes place and how conduction occurs.

On the periodic table, which group of elements tend to form positive ions?

Group 16 and Group 17

Group 1 and Group 16

Group 2 and Group 17

Group 1 and Group 2

Please help with this science assignment

Although Leonardo Da Vinci was well-known for being an artist, how has he contributed to the fields of motion and medicine?

Thx if you help :D

How can you describe a mineral that has a measure of 1 on the hardness scale, looks dull, and breaks into square chunks?
A. It is soft, metallic, and has cleavage.
B. It is hard, non-metallic, and has cleavage.
C. It is hard, metallic, and does not have cleavage.
D. It is soft, non-metallic, and does not have cleavage.

HELP ! DUE IN 41 MINUTES!
WILL GIVE BRAINLISIT!!!!!!

please help me with this science question, please only answer if you know the answer. also help me asap, thanks

If the temperature of the Earth's layers increases by about 90 degrees Fahrenheit for every 1 mile from the surface and you are estimating the temperature of a point in the mantle 160 miles below the surface, how hot would the mantle be at that depth?
A. 12,800°F
B. 14,400°F
C. 1.78°F
D. 160°F

help me whith this
Describe the processes of photosynthesis

Which of the following statements BEST relates a star's color to its surface temperature?
Question 5 options:

blue stars have a relavtively high temperature

blue-white stars have a relativey low temperature

red stars have a relavtively high temperature

yellow stars have a relatively high temperature

The Miami Blue butterfly is an endangered species in South Florida. Which factor has most likely caused the population decline of this butterfly?


increase in the number of parks

increase in number of homes built

decline in the amount of predators

decline in the amount of seawater

Milk (pH 6.7)
Coffee (pH 5)
Ammonia (pH 11.6)
is most basic, and which one is most OH- concentrated

Jan drew a diagram to compare centipedes and millipedes.



Which belongs in the area labeled Y?

are active predators
have two pairs of legs on each segment
use specialized mouthparts to attach to hosts
use claws to inject venom

What identifies the levels of organization that make up the respiratory system in order of increasing complexity?

The International Date Line
Oruns through Greenwich, England
O roughly follows the 0° line of longitude
O is recognized as the location where new days begin
o divides the United States into different time zones

I need some help cuz i don't remember what that long word means!!

Pleeeeeease help I’ll give brainliest! With number 20.

Help i'll give Brainliest It's important
A student is trying to identify the different forms of energy described in the following chart:

Form of Energy

Description

Example(s)

Energy A

potential and kinetic energy are the basic types
describes how much work an object can do
a speeding car
a pebble sitting at the top of a mountain
Energy B

kinetic energy + potential energy of particles
determines the temperature of a substance
all matter

How should each form of energy be identified?
A. Energy A: gravitational energy
Energy B: chemical energy
B. Energy A: nuclear energy
Energy B: electrical energy
C. Energy A: electromagnetic energy
Energy B: sound energy
D. Energy A: mechanical energy
Energy B: thermal energy

A restaurant advertises that it is environmentally friendly. It describes the solar panels it uses to generate electricity and the locally grown produce it serves. All the meals it offers are prepared over an open wood fire. Food is served on recycled copper plates, and drinks are served in recycled aluminum cups.

Which correctly lists three renewable resources used by the restaurant?

aluminum, copper, produce
copper, produce, sunlight
produce, sunlight, wood
sunlight, wood, aluminum

Which product has a bitter taste, is slippery when mixed with water, and can damage skin and eyes?

sodium hydroxide

lactic acid

acetic acid

citric acid

Help please with number 3 don’t worry I will give brainliest to the best answer!

Please help me fill this ven diagram in its very simple I just need help

These celestial bodies are thought to originate from two different sources. Some are called long-period and originate from the Oort Cloud. These bodies orbit the Sun but may take as long as 200 years to complete one orbit. Others are called short-period and originate from the Kuiper Belt in our solar system.

What is this celestial body called?

A) Asteroid

B) Comet

C) Meteor

D) Planet

According to the pH scale, which pH measurement is basic?

7.0

5.5

1.2

9.5