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
Nata [24]
3 years ago
8

Alfred Wegener believed that all of the continents were originally: a. a single landmass called Pangaea c. three landmasses call

ed Europe, Asia, and Gondwana b. two landmasses called Eurasia and Gondwana d. none of the above
Biology
2 answers:
xeze [42]3 years ago
7 0

Answer: is A

Explanation: because i just took unit test and made 100%

Nuetrik [128]3 years ago
3 0
<h3>Answer: </h3>

its A

<h3>Explanation:</h3>

You might be interested in
Which factors improve soil fertility
Ulleksa [173]
I think the answer is water
4 0
3 years ago
Signal molecules that travel through the vascular tissue to target cells where they have their effect
max2010maxim [7]
Where they have there effect on the tissues cells

8 0
3 years ago
The Brazil nut tree, Bertholletia excels (n = 17), is native to tropical rain forests of South America. It is a hardwood tree th
Anna71 [15]

Answer:

Answer is option A.

Orchid bees are to Brazil nut trees as breezes are to pine trees.

Explanation:

In Brazil nut trees, the female orchid bees act as pollinators that help in pollination. In pine trees, wind or breeze helps in pollination.

Pine trees are gymnosperms and so they do not have flowers to attract pollinators like bees or butterflies or birds. They are wind-pollinated. Pine trees are monoecious i.e., both male and female reproductive structures (pine cones) are present on the same tree.

The male cones (catkins) produce pollen grains that are lightweight, less sticky and have air bladders or small wing-like structures. As a result of these features, the pollen grains can be easily carried and dispersed by the breeze. In order to prevent self pollination (pollen falling on the female cones of the same tree), the male cones are normally located on the lower branches of the pine tree.  

The female cones are located on the upper branches of the tree and the center of the cone contains eggs or ovules. The pollen grains that are carried by the wind, fall on the female cone of another pine tree. Each pollen grain grows a pollen tube into the center of the cone and the nucleus cell of the pollen travels through the tube and reaches the egg, where it combines with the egg to form an embryo. The embryo eventually grows into a seed. The seeds of pine trees are then dispersed by wind or animals such as squirrels.

6 0
3 years ago
Patients forgetting to take their antibiotics are not the sole cause of antibiotic
lukranit [14]
Other reasons are
Not finishing the antibiotics.
Or
Taking antibiotics too often
6 0
3 years ago
Read 2 more answers
Chondrocytes are found in cavities called
Sloan [31]

Answer: The chondrocytes exist in cavities in the matrix called lacunae. A cartilage with few collagen and elastic fibers is hyaline cartilage

Explanation:

7 0
3 years ago
Other questions:
  • Reproductive isolation is _____.
    12·1 answer
  • What causes thermal convection that drives plate motion?
    11·2 answers
  • Which of the following will produce<br> the most genetic diversity in<br> offspring?
    5·1 answer
  • Draw the Punnett squares and write out the phenotypes pls ??☺​
    12·1 answer
  • What process ensures that organisms will have plenty of oxygen?
    10·2 answers
  • Ina concludes that color does influence the attraction of butterflies and moths do you think this is a logical conclusion
    7·2 answers
  • Explain the difference between negative growth rate and zero growth rate.​
    15·2 answers
  • The electrons are not shared equally creating a _________ molecule.
    13·1 answer
  • Which of the following describes how scientific law and a science theory are similar?
    6·1 answer
  • Supuie ) Prokaryotes have nucleus that is without : i) nuclear ii) membrane nucleous iii) nucle​
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!