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serious [3.7K]
3 years ago
6

What causes the different sessions on earth

Biology
1 answer:
const2013 [10]3 years ago
5 0
Earth has seasons because our planet's axis of rotation is tilted at an angle of 23.5 degrees relative to our orbital plane the plane of Earth's orbit around the sun. The tilt in the axis of the Earth is called its obliquity.
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In this lab, you used a dichotomous key to identify organisms. Why would this skill be valuable to you? Check all possible reaso
Oliga [24]

The reason why a dichotomous key to identify organism is valuable, is because it helps you classify organisms,it helps you identify eco -systems, it helps you analyze an organism's traits.

Explanation:

A dichotomous key is a skill that has been brought about by scientists, to help people to identify and classify organisms.

In Dichotomous key, the main way of identifying an object is by it scientific name.This is because, though two objects might look similar to each other but they might belong to a whole different species.

So, it is is easier to identify the organism from its scientific name, as it will tell us which species it belongs to.

This key is very useful to people who are novice, and don't know much about identifying an organism.

This key also helps identifying, whether an organism belongs to a particular closely related group of organisms or is a separate organism.

It helps one analyze the traits of an organism, and based on their characteristics, it will help you identify and classify the species of the object or organism.

3 0
3 years ago
Read 2 more answers
Part A: If one follows 70 primary oocytes in an animal through their various stages of oogenesis, how many secondary oocytes wou
olga nikolaevna [1]

Answer:

<u>Part A</u> : 70 secondary oocytes will be formed.

<u>Part B</u> : 70 first polar bodies will be formed.

<u>Part C</u> : 70 ootids will be formed.

Explanation:

During oogenesis growth maturation of a single oogonium produces one primary oogonium.

the primary oogonium then undergoes meiosis -1 and produces  one secondary oocyte and first polar body.

The secondary oocyte then undergoes meiosis - 2 and forms an ootid and second polar body.

The ootid then differentiates into the ovum.

As in the above scenario , 70 primary oocytes are present , they undergo meiosis-1 and produces 70 secondary oocytes and 70 first polar bodies. Hence answers of part A and B is 70.

As 70 secondary oocytes are formed , they undergo meiosis -2 and forms 70 ootids which then differentiate in 70 ovums.

8 0
3 years ago
Describe how cooperativity of oxygen binding in hemoglobin is advantageous for the transport of oxygen from the lungs to the tis
Nostrana [21]
The affinity of hemoglobin for oxygen is less than its structural analog myoglobin. However, this does not affect hemoglobin's usefulness for the body; on the contrary, it allows hemoglobin to be a  more efficient carrier than myoglobin. This is because hemoglobin can release oxygen more easily than can myoglobin. It is both important for oxygen to be carried to different areas and also to be released when needed. The higher affinity of a given protein for oxygen, the harder it will be for that protein to release oxygen when needed. Therefore, hemoglobin's lower affinity for oxygen serves it well because it allows hemoglobin to release oxygen more easily in the body. 
3 0
3 years ago
What is required for sexual reproduction to occur?
Dimas [21]

Answer:

a d*ck and a yk what-

Explanation:

no need for me to say more,

3 1
3 years ago
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What is natural selection? ​
lora16 [44]
A theory that states that only the organism with traits that are useful to the environment survive. For example, short-neck giraffes would’ve died out years ago as they can’t reach the trees nor eat grass on the ground.
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3 years ago
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