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snow_lady [41]
3 years ago
8

Who built the first microscope which allowed people to see things no one has ever seen before such as bacteria sperm in red bloo

d cells
Biology
1 answer:
jeka943 years ago
3 0

Zacharias Janssen was credited with inventing the microscope, however some say Hans Lippershey was the actual inventor as he patented the telescope, which has some similar properties.

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How do upwelling currents near the shore affect the abundance of aquatic organisms along the shoreline?
matrenka [14]

They bring the nutrients toward the shore and increasing the abundance of the organisms.

<u>Explanation:</u>

The deep water brought out to the surface of the land is often rich in the nutrients, coastal up-welling supports the growth of the seaweed and the plankton.

The nutrients are used as the food for the marine animals, birds, fish. The up welling method generates some of the world's most fertile ecosystems. The up welling is the process which helps to move the deeper water, which is rich in the nutrients to warmer the shallower water in the ground.

8 0
3 years ago
In this experiment, how many chromosomes were present when meiosis i started? 2. in this experiment, how many nuclei are present
wariber [46]
1. The answer depends on your picture.
DNA is packed and condensed with proteins in the form of chromosomes.

Since the process of division is going to start that means each chromosome will have an X shape. They had the DNA content copied once (in the S phase). The original, plus the copy created, form the X.

You just have to count the number of X's in the picture.

2. The answer is 4 nuclei.
Since the process of division happening is meiosis, that means that four new cells will be originated from a cell that's dividing.
So, four new cells each one with a nucleus, that means 4 nuclei in total.

If this was mitosis, only 2 new cells would be formed which means 2 nuclei

3. The number of chromosomes depends on your picture/exercise.

The answer would be half of the number of chromosomes that you started in the meiosis 1.
This time, chromosomes won't have an X shape since the copies were separated. At the end of the process, each chromosome has just one chromatid.
6 0
4 years ago
5 points
Naya [18.7K]

Answer:

A gene is a section of a double-stranded molecule known as DNA. This molecule is found within the nucleus of the cell, contained in threadlike structures called chromatin. The two strands form a double helix linked by a series of paired bases. The base adenine is always linked to thymine and the base cytosine is always linked to guanine.

4 0
3 years ago
Help me please !I’ll mark you brainly
grigory [225]

Answer:

1 is b

2 is c

3 is either b or c

i don't really remember 4, sorry

Explanation:

4 0
3 years ago
Explain the process by which Amoeba takes its food from the outside to inside the body​
Dovator [93]

Explanation:

Feeding And Digestion In Amoeba

Initially, it pushes out its pseudopodia so that it can encircle the food. After this, it engulfs the food, thus forming a bag-like structure called food vacuole. The process is known as “phagocytosis”. ... Well, the excess food gets stored in the form of glycogen as well as lipids.

8 0
3 years ago
Read 2 more answers
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