1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
yulyashka [42]
3 years ago
9

What is the hardness of copper and aluminum

Biology
1 answer:
Charra [1.4K]3 years ago
7 0
Aluminum is 15 and copper is 35
You might be interested in
Within a gymnosperm megasporangium, which of the following developmental sequences is correct, assuming fertilization occurs? Gr
yan [13]

Within a gymnosperm megasporangium, the following developmental sequences that are correct, assuming fertilization occurs is: megaspore, female gametophyte, egg cell, sporophyte embryo. The last Option (Option D) is correct.

In gymnosperm megasporangium, the meiotic division produces four haploid megaspores from a single cell, three of which generally degenerate. The female gametophyte is formed by mitosis from the surviving megaspore.

Prior to fertilization, the male mature gametophyte needs to be transferred to the female gametophyte for fertilization to take place.

When the nuclei of the sperm encounter the nucleus of the egg cell in gymnosperms, it fuses with the egg nucleus to produce a diploid zygote.

Mitosis occurs in the fertilized egg to initiate the growth of a new sporophyte generation (the multicellular embryo of the seed.)

Therefore, we can conclude that we've understood the mechanism of developmental sequence in the gymnosperm megasporangium.

Learn more about the gymnosperm here:

brainly.com/question/4526473?referrer=searchResults

3 0
2 years ago
Which organism was used to re-evaluate its position in
marta [7]

Answer:

Fungi

Explanation:

Fungi is a eukaryotic organism that is re-evaluating its position in  the tree of life.

Fungi are closely related to the animal kingdom in comparison to the plant kingdom. Because of the presence of the chitin in their cell walls, fungi is different from plant, bacteria, and protists. But fungi have cell wall while animal cells do not contain cell wall, so not classified as animals.

So, fungi is re-evaluating its position in  the tree of life and in present there is a individual kingdom for fungi.

6 0
3 years ago
If the speed of a player doubles (2x), his kinetic energy will​
SpyIntel [72]

Answer:

If you double the speed of an object, the kinetic energy increases by four times. The word "kinetic" comes from the Greek word "kinesis" which means motion. Kinetic energy can be passed from one object to another in the form of a collision.

Explanation:

The kinetic energy is proportional to the square of the speed, so doubling the speed increases the kinetic energy by a factor of 4.

8 0
2 years ago
Light and sound waves both carry energy. When light strikes an object, the colors seen are reflections of the visible light spec
Klio2033 [76]

A.

Sound absorption depends more on the thickness of a material than its color.

4 0
3 years ago
Wildlife can be scarce in many large, densely populated cities. A few plants and animals can be found in these areas. For exampl
Gwar [14]

the answer for PLATO is:

"Yes, because these organisms likely depend on each other for survival. For example, plants and grasses can make food for insects and other small animals, such as rats. Carnivores can eat the small animals and obtain energy from them. Humans are also living things, sk they contribute to the ecosystems of these organisms. They can provide food for rats and insects. Humans can also water the plants"

Paraphrase that as you will.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Magma that cools very slowly deep beneath the surface forms minerals with what type of crystals? a. small b. large c. very hard
    15·2 answers
  • The higher plant type that carries its seeds in cones is the ________.
    13·1 answer
  • Why its important that skull joints cannot move
    9·1 answer
  • Which does erosion do?
    12·2 answers
  • Even though natural gas is the cleanest of the fossil fuels, which of the following are problems with natural gas? Select
    9·1 answer
  • Is Osteoporosis an infectious disease or non-infectious?
    10·1 answer
  • Why high solute drinks increase thirst instead of relieve thirst?
    7·2 answers
  • Why is the use of stem cells so controversial?
    5·1 answer
  • When a person is cut, the injured tissue initially releases chemical signals into the bloodstream. These chemicals signal platel
    6·1 answer
  • Need help with this please
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!