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
Sveta_85 [38]
2 years ago
9

explain why the pollen grains and embryo sacs of flowers are considered the gametophyte generation in the alternation of generat

ions life cycle of angiosperms
Biology
1 answer:
podryga [215]2 years ago
3 0

Answer:

Both structures are multicellular, and they both reproduce using gametes.

Explanation:

You might be interested in
If we know the atoms mass in amu and we know the number of protons of the atom, can we calculate the number of neutrons that con
olga nikolaevna [1]
Yes you can. The atomic mass measured from the proteins and neutrons in an atom, since you know he number of protons, you can subtract and be left with the number of neutrons.
5 0
3 years ago
How did fossil<br> fuels form, and how<br> are they obtained<br> and used?
Usimov [2.4K]

Explanation:

Fossil fuels are important energy sources for our every day activities.

  Formation of fossil fuels

Fossil fuels forms from the accumulation and burial of organisms in a basin of deposition. Instead of the organisms decaying, they preserve their carbon content. To be worthy of becoming fossil fuels, organisms must be buried in an environment where there is little to no oxygen to fast-track decomposition of the buried organic matter. Increase in temperature and pressure causes the organic matter to transform into fossil fuels.

How are they obtained

First, different fossil fuels have their extraction techniques because they occur in different physical state of matter.

For the solids e.g coal: exploration is carried out first and if a prospect is delineated, mining engineers design the best way to extract the coal from nature. Coal is usually found laid in sedimentary beds in nature. Top layers of sediments can be removed to extract the coal.

For fluids such as crude oil and natural gas, after a prospect is identified, a rig is usually constructed to extract the fluid and gas. The natural pressure allows for the fluids the rise within the drill used in extraction.

How are they used

Coal and gas are used to power electrical generating plants. They are used to heat steams which drives turbines and produce electricity.

Natural gas is used as a domestic fuel for cooking and so also coal.

When crude is processed a lot of product is obtained. Gasoline is used to power most internal combustion engines. Some chemicals useful for manufacturing plastics, drugs e.t.c are also derived from the processed crude.

Learn more:

Harnessing fossil fuel brainly.com/question/9231468

#learnwithBrainly

8 0
3 years ago
Because it is difficult to excrete iron once it is in the body, iron balance is maintained primarily through absorption. The iro
Rzqust [24]
<h2>The given statement is true</h2>

Explanation:

Iron absorption occurs in the duodenum and upper jejunum of small intestine

  • At physiological pH ferrous iron is rapidly oxidized to the insoluble ferric form
  • Gastric acid lowers the pH in the duodenum which enhances the solubility and uptake of ferric iron
  • Once iron gets inside the enterocyte it can be stored as ferritin;Ferritin is a hollow spherical protein which helps in storage and regulation of iron levels within the body
  • Ferritin molecule have ferroxidase activity which helps in the mobility of Fe2+ out of the enterocyte by ferroportin
  • Transferrin is the major iron transport protein which transports iron through blood
  • Fe3+ binds to transferrin so Fe2+ transported through ferroportin must be oxidized to Fe3+
  • Fe2+ needs to be oxidized first so that it can be transported through ferroportin
  • Once iron gets inside the cell it can be used for various cellular processes
6 0
3 years ago
HUISWELLICH
drek231 [11]

Answer:

Nitrogen is an important nutrient for all plant cells, and it is component of the chlorophyll  found in leaves. Which of the following statements best describes how nitrogen is absorbed  and distributed to the leaves of the plant so that photosynthesis can take place?

Nitrogen is absorbed by the roots and distributed upwards through the xylem

Explanation:

Nitrogen are gotten from the ground by the plants before it is transported through xylem to the stem and then the leaves

4 0
3 years ago
What are brown bears doing as a result of panting
Elden [556K]
The 4th one. Maintaining body temperature and cooling down
6 0
3 years ago
Read 2 more answers
Other questions:
  • Relate the use of genetic engineering to the treatment of human illnesses such as hemophilia. I need help
    8·1 answer
  • The two strands of dna are hold together by
    7·1 answer
  • Many organisms could potentially provide new medicines for human use, making which of the following crucial?
    11·1 answer
  • How much energy is lost when one organism consumes another organism? A. 10% B. 90% C. 80% D. 5%
    14·2 answers
  • Compare a climax community to a pioneer species?
    6·1 answer
  • When DNA is duplicated during mitosis, _____.
    13·1 answer
  • Nancy's diet is deficient in iodine. This will affect the secretion of which hormone?
    7·1 answer
  • 9 Which of these best demonstrates mutualism between certain types of bacteria and humans?
    15·1 answer
  • . What is the ratio of C, H, and 0 atoms in carbohydrates? O1:2:1 O1:6:1 O1:3:T O2:3:2​
    10·1 answer
  • Explain why the size of a new moon would affect the appearance of a solar eclipse.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!