answer.
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
sveta [45]
2 years ago
15

A scientist studied four pieces of fossil evidence that show the evolution of the modern-day man. These date back to 2 million y

ears, 1 million years, 0.5 million years, and 0.25 million years ago. Which fossil is the least similar to the modern-day man? (4 points) a 0.25 million years b 0.5 million years c 1 million years d 2 million years
Biology
1 answer:
torisob [31]2 years ago
3 0

Answer:

D 2 million years  is the answer

Explanation:

You might be interested in
Write all possible codons recognized by each of the given anticodons. An anticodon strand reads 5'–GCG–3'. Fill in the missing b
gregori [183]

Answer:

Codon: 3'-CGC-5'

Codon: 3'-UGC-5'

Explanation:

The anticodons of tRNAs bind to the complementary codons of mRNA. The mRNA codons are always read in 5' to 3' direction. The 5' base of an mRNA codon pairs with 3' base of the anticodon of tRNAs. The first base of the anticodon (the  5' base) determines the number of mRNA codons that are recognized by the tRNA. When the 5' base of the tRNA anticodon is U or G, it binding with codon is less specific. A tRNA anticodon with 5’ G base can read two different codons.  

Anticodon:  5'–GCG–3'.

Codon: 3'-CGC-5'

Codon: 3'-UGC-5'

5 0
2 years ago
Use the drop-down menus to complete the statements. Are made of sugars. Are used by organisms for long-term energy storage. Are
Novosadov [1.4K]

Answer:

Are made of sugars = Carbohydrates

Are used by organisms for long-term energy storage = Lipids

Are used by organisms for energy = Carbohydrates

Are made of fatty acids = Lipids

8 0
2 years ago
Read 2 more answers
Drag each tile to the correct box. Explain the process in which hormones secreted by the pancreas function with respect to incre
olga55 [171]

Answer:

The correct order is:

  1. High amount of glucose in the blood, sending signals toward the pancreas.  
  2. Synthesis of hormones by beta cells.
  3. Binding of hormones with receptors on the liver.
  4. Intake of glucose molecules from the blood by specific transporters.
  5. Release of hormones from the receptors  

Explanation:

  • The pancreas produces two hormones important for the regulation of blood glucose levels.
  • The two hormones, glucagon and insulin, increase and decrease the blood sugar respectively.
  • Insulin lowers the blood glucose by stimulating the body cells to increase the intake of glucose.
  • The brain senses high/low blood glucose, then, sends signals to the pancreas to initiate the synthesis of insulin or glucagon by the beta cells.
  • These hormones bind to receptors on body cells; on hepatic cells, in case of insulin.
  • The receptors initiate cellular signaling that facilitates intake or exit of glucose in or out of body cells.
4 0
2 years ago
Read 2 more answers
Imagine you are a red blood cell sitting in the right atria of the heart. Write a paragraph that describes what happens to this
alexandr402 [8]

Answer:

A red blood cell, sitting in the right atria of the heart is chocolate-brown in color since its a deoxygenated red blood cell with carbon dioxide rather than oxygen in its hemoglobin.

 

First

The tricuspid valve pumps it through the right ventricle

Secondly

pulmonary valve pumps it from the right ventricle to the pulmonary circulation.

Then

In the alveoli of the lungs, gas exchange occurs during pulmonary circulation

The end product is oxyhemoglobin( bright red colour) I.e oxygenated blood

The next step

pulmonary veins is the means whereby the red blood cell go to the left atria from the pulmonary circulation through the aortic valve

to mitral valve then to the aorta and systemic circulation

Therefore

oxygen is replaced by carbon dioxide during systemic circulation indicating a end to cellular respiration

Lastly

It's transported back to the right atrium of the heart completing the cardiac cycle.

3 0
2 years ago
When enzymes are elongating (building) a newly synthesized dna strand in pcr, new nucleotides are being added to the ____ of the
Tamiku [17]
The correct answer is c. 3 ' hydroxyl of deoxyribose.  
<span>
During the DNA synthesis via PCR, polymerization occurs in 5’-3’ direction. This means that enzyme DNA polymerase which synthesizes a new DNA strand is complementary to the DNA template strand (3’-<span>5’ direction). 5’ phosphate group of the free nucleotides which are added is attached to the 3'-hydroxyl group at the end of the elongating DNA strand.</span></span>
3 0
2 years ago
Read 2 more answers
Other questions:
  • Tissue cultures (samples of cancer cells) are taken from cancer patients, and the cells are then grown in a laboratory. What is
    14·2 answers
  • Coach Taylor is trying to explain the negative side effects smoking has to athletic performance. Which of these options include
    8·2 answers
  • When a newly formed cell enters into interphase and begins conducting metabolic functions, it is in _____. G0 phase G1 phase G2
    13·2 answers
  • Which part of the cell surrounds the cell and allows molecules in and out this cell part also has holes in it and is said to be
    9·1 answer
  • What happens when you slowly pulled the cardboard? Explain.
    6·1 answer
  • How did the backyard bird feeders in the article increase competition in that ecosystem?
    14·1 answer
  • Which of the following correctly describes the relationship between hibiscus flowers and bumblebees that eat hibiscus nectar and
    15·1 answer
  • To perform the experiment, Jared will follow these instructions: Put one or two ice cubes in one cup of water. Chill the cup of
    7·1 answer
  • Biochemical and genetic experiments have demonstrated that the _________ of tRNA are important for recognition by its cognate am
    10·1 answer
  • Marc checked in to the urgent care with symptoms of fever, sore throat and fatigue. His strep test turned out to be positive. St
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!