Why do roots always grow in a downward direction, no matter which way you turn the seed or seedling?
because roots weigh more than any other plant part
because the plant’s stem begins to grow, and it pushes the roots downward
because that is the direction that roots find necessary water and nutrients
because the root contains hormones that make it grow away from the sun

How?

Water is clear and clouds are white, BUT clouds are made of water...

Why are index fossils useful for determining the age of other fossils or rock layers?

diploid -> diploid in mitosis, meiosis, or both

A: A bright, egg shaped form. B: Dust, gas, and stars in a nonuniform arrangement. C: Dust, gas, and stars in the shape of a pinwheel.
Use the drop-down menus to identify each type of galaxy pictured.
Galaxy A:
Galaxy B:
Galaxy C:

Please answer I need help

1. A hurricane draws its energy from the cold, dry air near the ocean's surface. true or false


2. when a hurricane passes over land, it loses its energy source

true or false

Please help I don't understand

how does the rock cycle support the explanation that "matter is never created or destroyed?"

Will get brainliest for correct answer :)
No links please

does Growth and repair in mitosis, meiosis, or both

Which source of evidence for evolution is the weakest?

i need help

is it right to like girls

What are some potential consequences if there is damage to skin?

How are SA node cells similar to nerve cells?

True/False: Animal viruses can only infect animal cells.

i will give brainlst if the answer is right

Which image shows water being used in industry?

Grass being watered by a sprinkler.

Water spraying over machinery.

Water being used to wash dishes.

Viruses vary in size and structure, but what is one thing they have in common?
a. they destroy the host cell
b. they all cause terminal illness
c. they all hijack a host cell
d. none of the above

If a scientist conducts an experiment on plants and uses 1,000 plants in the control group and 1,000 plants in the test group, why is it still important that someone else be able to replicate the experiment and get similar results?
A. to help the experiment get published
B. to study the original methods and design new experiments
C. to confirm the original data and methods
D. to allow beginning scientists to practice designing experiments

How do different climate zones respond to severe weather?
What challenges does each climate zone face?
How can that climate zone be best prepared for severe weather?
Which climate zone is the safest to live in? Why?

What is the answer to number 2??

How are traits passed to offspring?

Carnivores and herbivores are both consumers. Which statement best describes how they differ from one another?

A) Carnivores produce all the energy they need

B) Carnivores only eat animals whereas herbivores only eat plants

C) Carnivores eat living organisms whereas herbivores eat organisms that have died

D) Carnivores obtain energy by eating food whereas herbivores obtain energy from sunlight

can someone please help me explain I don't understand

What are the substances?

How is mankind amping up the greenhouse effect?

Healthy human lungs look pink and spongy from the outside. The left lung is a little smaller than the right lung to make room for the heart. The lungs and heart are both protected by the rib cage. In the lungs, each main bronchus branches off into many smaller bronchi. The bronchi become smaller and smaller, and the smallest bronchi are called bronchioles. There are about 30,000 bronchioles in each lung, each about the same thickness as a strand of hair. The inhaled air eventually ends up in tiny air sacs called alveoli at the end of each bronchiole. There are about 300 million alveoli in each lung. They are covered with capillaries, tiny blood vessels that are only one cell thick. Oxygen travels from the alveoli through the capillaries to the bloodstream, heart and other cells.

Which of these best represents the progression of bronchi, bronchioles and alveoli in the lungs?

A
tree trunks that become smaller branches and twigs

B
a tight flower bud that has opened into a full bloom

C
whole apples that are sliced into separate wedges

D
a bridge that crosses two rivers