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Jlenok [28]
3 years ago
6

If you look at the cross section of a long bone under a microscope, the rings of bone immediately internal to the periosteum of

the bone are called
Biology
1 answer:
mina [271]3 years ago
3 0
<span>External circumferential lamellae</span>
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Complete the sentences to describe natural selection
Vikentia [17]
  1. The environment needs to change in order to natural selection to occur.

Reason:

Because, Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.

2. Population has some genetic variations.

Reason:

Genetic variation is essential for natural selection because natural selection can only increase or decrease frequency of alleles that already exist in the population. Genetic variation is caused by:

mutation and random mating between organisms

3. Nature select organism with specific traits to survive and reproduce.

Reason:

According to Charles Darwin's theory of evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.

6 0
3 years ago
Explain how water enter the soil root hairs of the plant
Juli2301 [7.4K]

since the roots hairs grow in soil particles, they get water from the soil, thereby the cell wall and cell membrane absorbs the water through osmosis before transferring it to other parts of the roots

7 0
3 years ago
2. If a cell has a very large amount of ribosomes attached to its rough
Otrada [13]

Answer:

Protein

Explanation

Ribosome and Rough E.R are organelles  in the cell.

E.R are extensive membranes (which are continuous with the nuclear membrane) that exist as flattened compartment in the cytoplasm.These compartment form sacs in the cytoplasm. The sacs are interconnected with one another to form a complete system  called the reticulum.

Based on structure two types of E.R exists -the Smooth E.R and the Rough Endoplasmic reticulum.The later is called rough because of Ribosomes attached to its outer membrane. the smooth lacks ribosomes attachment on its outer membrane. Ribosomes are the site of Protein synthesis in the cell.

They are small in number and are made up of RNA and protein.Generally the protein  synthesised  in the Ribosomes,are moved into the sacs in the R.E.R,where they are modified.They are eventually budded off in vesicles which form the Golgi bodies

5 0
3 years ago
The purpose of Metosis is to
Basile [38]

Answer:

Mitosis is a mechanism in which a single cell separates into two separate cells of daughters. One cell in mitosis? Once splits two similar cells into two. Mitosis is primarily aimed at growth and replacement of depleted cells

Explanation:

7 0
3 years ago
Read 2 more answers
What is the best way to add more wolves and bees into a park?
Brut [27]
Bees are attracted to beautiful flowers to pollinate. Where ever you see flowers you see bees to pollinate and take nectar. In terms of wolves wooded areas where deers and their preys are you will find them.
4 0
3 years ago
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