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Andre45 [30]
4 years ago
15

Modern humans first appeared during the

Biology
2 answers:
stira [4]4 years ago
4 0
A. Most recent period of the Cenozoic era. 


ratelena [41]4 years ago
4 0

Answer:

The correct answer is A) most recent period of the Cenozoic era.

Explanation:

Modern humans belong to a species called Homo sapiens that first appeared approximately 200.000 years ago. The Cenozoic era is the latest, made of two periods (tertiary and quaternary) where the latest is the quaternary that goes from 1,8 to 0,01 million years.

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Some scientists have collected and stored seeds for many types of food-producing plants. The purpose of
allsm [11]
If scientists collect and store seeds samples this means that they want to have a collection of the species with the objective of being sure that the species won't disappear- with the objective of preserving the species.

If they collect seeds of many species, this means that they're interested in the diversity of species: the correct answer is (4) preserve the diversity of plant species
4 0
3 years ago
What are the ways oxygen is transported in the blood, ranked according to the way that is responsible for the majority of transp
lorasvet [3.4K]

Answer:

f. 1- Hb; 2- dissolved in plasma

Explanation:

Transport of oxygen in the body occurs in two way; oxygen bound to hemoglobin and oxygen dissolved in plasma.

1. Bound to hemoglobin :

Hemoglobin, or Hb, is a protein molecule found in red blood cells and is responsible for the colour of red blood cells. It is composed of four subunits of two types of the protein globin: two alpha subunits and two beta subunits. Each subunit surrounds a central heme group (red in color) that can bind one oxygen molecule.Therefore, each hemoglobin molecule can bind and transport four oxygen molecules. About 98.5% of oxygen is transported in the body bound to hemoglobin.

2. Oxygen is only fairly soluble in blood plasma. As a result, only 1.5 percent of oxygen in the blood is dissolved and transported in blood plasma.

4 0
3 years ago
What happened to the indigenous“medicine man” after Dr. Campbell showed up and why?
Alex

Answer:

The indigenous 'medicine man' flees seeing Dr. Campbell because both Dr Campbell and the medicine man, were in conflict with each other.

Explanation:

'Medicine Man' is a movie directed by John McTiernan, starring Sean Connery(as Dr. Robert Campbell) and Lorraine Bracco(as Dr. Rae Crane). The film is about Dr. Campbell who sets into the forest of Amazon and finds the cure to cancer.

The Medicine man is the one who informed Dr. Campbell about the flowers containing 'ju-ju' (powers to heal). But after Campbell cured a little boy having gas by 'alka-seltzer', they both were in conflict of each other.

So, when Dr. Campbell showed up with the man and a little boy suffering from malignant neoplasms at the medicine man doorsteps, the indigenous medicine man flees from there.

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3 years ago
Which is an advantage of sexual reproduction over asexual reproduction? A) increased number of organisms and decreased genetic v
ollegr [7]
B. is the answer hoped it helped
3 0
3 years ago
?????? Vbbnnxkds<br>Skzjyjdjzkamlalsc<br>D
Sunny_sXe [5.5K]

Answer:

uhhhh what?

I'm so confused- ;-;

6 0
3 years ago
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