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
weqwewe [10]
3 years ago
9

Zacharias Jansen was known for being a spectacle maker and is credited with making the 1st

Biology
2 answers:
BlackZzzverrR [31]3 years ago
8 0

Answer: False

Explanation: He only discovered helium and chemical chromosomes

Ratling [72]3 years ago
4 0

Answer:

True

Explanation:

Zacharias Jansen was known for being a spectacle maker and is credited with making the 1st microscope!

You might be interested in
How would you describe amino acids in<br> proteins?
Digiron [165]
Do you still need this answered
5 0
3 years ago
Read 2 more answers
Which of these provides the best evidence for the plate tectonic theory? (5 points)
kirza4 [7]

Answer:

Seafloor spreading at the mid-ocean ridge provides the mechanism for tectonic plate movement. The Earth's mantle moves through convection, showing that tectonic plates are able to glide. The location of the plates was determined by locating their boundaries, using data on the Earth's magnetic field.

3 0
3 years ago
What happens first at each origin of replication?
schepotkina [342]

Answer:

The answer is C.

Explanation:

At first, an enzymes called Helicase unwind the double helix in a DNA .

6 0
3 years ago
In many cells, the adhesion to the extracellular matrix through integrins causes the activation of kinases in the cytoplasm. Thi
Pachacha [2.7K]

Answer: There is presence of tumor.

Explanation: The adhesion of cells to extracellular matrix (EMC) through integrins ( cell-EMC binding molecules, which are collagens, laminins and fibronectin) causes the activation of kinases in the cytoplasm.

However, kinanes helps in controlling the epithelial cell differentiation and upholding the epithelial tissues. This is done by the addition of phosphate groups to a substrate protein which is termed Protein phosporylation. Then, the kinases direct the affairs of the cell and it's activities. For example, it determines the cell division, anabolic and catabolic activities of the cell, movement of ions between the cell and it's environment (signal transduction), protein functions and etc.

Conclusively, since the activities of the cell like cell division and protein functions is dictated by the kinase, reduction in cell division that gave rise to rapid growth is put on hold. Hence, the tumor is been suppressed.

Note: the binding of cell-EMC is regulated by Transforming Growth Factor (TGF) β.

4 0
3 years ago
24 I’ll put you as brainliest
Sholpan [36]

Answer:

A. Biodiversity will decrease .

Explanation:

  • The loss of a keystone species can cause extinction  or mass destruction of other species that are dependent on it because keystone species are those species which significantly influence the existence and survival of other species in an ecosystem
  • Since, beavers are considered as the keystone species, their removal  from the ecosystem will cause loss of many other species in the ecosystem resulting in Decrease in the biodiversity of that ecosystem.
7 0
3 years ago
Other questions:
  • Dinosaurs were the dominant land animal of the Mesozoic Era. true or false
    11·2 answers
  • Question 8 of 10
    15·1 answer
  • Which system coordinates the body’s response to changes in its internal and external environment
    14·1 answer
  • More than one million years ago, a single species of finch migrated to the Galapagos from the mainland of Central or South Ameri
    5·1 answer
  • Women have a smaller quantity of the enzyme ____, which breaks down alcohol.​
    14·1 answer
  • Occlusion of the left anterior descending artery during a myocardial infarction would interrupt blood supply to which structures
    7·1 answer
  • Can someone explain what in organelle
    5·2 answers
  • Which of the following is an example of an abiotic factor
    13·2 answers
  • What are the secretions produced by the inner lining of the stomach and explain their functions.
    7·1 answer
  • A valid scientific investigation must be able to be
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!